Technical Report

NREL/TP-500-45889

June 2010

Assessment of Offshore Wind 

Energy Resources for the

United States

Marc Schwartz, Donna Heimiller, Steve Haymes, 

and Walt Musial
National Renewable Energy Laboratory

1617 Cole Boulevard, Golden, Colorado 80401-3393

303-275-3000 • www.nrel.gov

NREL is a national laboratory of the U.S. Department of Energy

Office of Energy Efficiency and Renewable Energy

Operated by the Alliance for Sustainable Energy, LLC

Contract No. DE-AC36-08-GO28308

Technical Report

NREL/TP-500-45889

June 2010

Assessment of Offshore Wind 

Energy Resources for the

United States

Marc Schwartz, Donna Heimiller, Steve 

Haymes, and Walt Musial

Prepared under Task No. WE10.1211
NOTICE

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iii

Table of Contents

Executive Summary............................................................................................................ 1

Offshore Wind Resource..................................................................................................... 5

GIS Database Structure....................................................................................................... 6

Database Components..................................................................................................... 6

Wind Resource Estimates............................................................................................... 7

Bathymetry...................................................................................................................... 9

Distance from shore ...................................................................................................... 11

Offshore Administrative Units...................................................................................... 12

Database Summary ........................................................................................................... 13

Future Plans ...................................................................................................................... 23

Acknowledgements........................................................................................................... 23

References......................................................................................................................... 23

Appendix A. Data Sources............................................................................................... 25

A1. State-to-State Boundary Data................................................................................ 25

A2. Wind Map Data..................................................................................................... 27

Appendix B. Detailed maps and tables............................................................................ 28

Appendix B. U.S. Detailed Wind Database Information by Element ............................. 29
iv

List of Tables

Table 1. Offshore wind resource area and potential by wind speed interval and state 

within 50 nm of shore. ......................................................................................... 3

Table 2. Offshore wind resource area by state with potential by wind speed interval, 

water depth, distance from shore ....................................................................... 14

Table A1. State-to-State Boundary Data........................................................................ 25

Table A2. Wind Map Datasets....................................................................................... 27

Table B1. U.S. offshore wind resource by state and wind speed interval. Resource 

areas limited to >7.0 m/s at 90-m height and within 50 nm of shore............ 29

Table B1.1. U.S. offshore wind resource by state and water depth category. Resource 

areas limited to >7.0 m/s at 90-m height and within 50 nm of shore............ 32

Table B1.2. U.S. offshore wind resource by state and distance from shore. Resource 

areas limited to >7.0 m/s at 90-m height and within 50 nm of shore............ 34

Table B1.3. Offshore wind resource by state, wind speed interval, water depth and 

distance from shore within 50 nm of shore. .................................................. 36

Table B2. California offshore wind resource by wind speed interval, water depth and 

distance from shore within 50 nm of shore. .................................................. 45

Table B3. Connecticut offshore wind resource by wind speed interval, water depth 

and distance from shore within 50 nm of shore. ........................................... 47

Table B4. Delaware offshore wind resource by wind speed interval, water depth and 

distance from shore within 50 nm of shore. .................................................. 49

Table B5. Georgia offshore wind resource by wind speed interval, water depth and 

distance from shore within 50 nm of shore. .................................................. 51

Table B6. Hawaii offshore wind resource by wind speed interval, water depth and 

distance from shore within 50 nm of shore. .................................................. 53

Table B7. Illinois offshore wind resource by wind speed interval, water depth and 

distance from shore within 50 nm of shore. .................................................. 55

Table B8. Indiana offshore wind resource by wind speed interval, water depth and 

distance from shore within 50 nm of shore. .................................................. 57

Table B9. Louisiana offshore wind resource by wind speed interval, water depth and 

distance from shore within 50 nm of shore. .................................................. 59

Table B10. Maine offshore wind resource by wind speed interval, water depth and 

distance from shore within 50 nm of shore. .................................................. 61

Table B11. Maryland offshore wind resource by wind speed interval, water depth and 

distance from shore within 50 nm of shore. .................................................. 63

Table B12. Massachusetts offshore wind resource by wind speed interval, water depth 

and distance from shore within 50 nm of shore. ........................................... 65

Table B13. Michigan offshore wind resource by wind speed interval, water depth and 

distance from shore within 50 nm of shore. .................................................. 67

Table B14. Minnesota offshore wind resource by wind speed interval, water depth and 

distance from shore within 50 nm of shore. .................................................. 69

Table B15. New Hampshire offshore wind resource by wind speed interval, water depth 

and distance from shore within 50 nm of shore. ........................................... 71

Table B16. New Jersey offshore wind resource by wind speed interval, water depth and 

distance from shore within 50 nm of shore. .................................................. 73
v

Table B17. New York offshore wind resource by wind speed interval, water depth and 

distance from shore within 50 nm of shore. .................................................. 75

Table B18. North Carolina offshore wind resource by wind speed interval, water depth 

and distance from shore within 50 nm of shore. ........................................... 77

Table B19. Ohio offshore wind resource by wind speed interval, water depth and 

distance from shore within 50 nm of shore. .................................................. 79

Table B20. Oregon offshore wind resource by wind speed interval, water depth and 

distance from shore within 50 nm of shore. .................................................. 81

Table B21. Pennsylvania offshore wind resource by wind speed interval, water depth and 

distance from shore within 50 nm of shore. .................................................. 83

Table B22. Rhode Island offshore wind resource by wind speed interval, water depth and 

distance from shore within 50 nm of shore. .................................................. 85

Table B23. South Carolina offshore wind resource by wind speed interval, water depth 

and distance from shore within 50 nm of shore. ........................................... 87

Table B24. Texas offshore wind resource by wind speed interval, water depth and 

distance from shore within 50 nm of shore. .................................................. 89

Table B25. Virginia offshore wind resource by wind speed interval, water depth and 

distance from shore within 50 nm of shore. .................................................. 91

Table B26. Washington offshore wind resource by wind speed interval, water depth and 

distance from shore within 50 nm of shore. .................................................. 93

Table B27. Wisconsin offshore wind resource by wind speed interval, water depth and 

distance from shore within 50 nm of shore. .................................................. 95

List of Figures

Figure 1. United States offshore wind resource at 90 m above the surface. ............... 10

Figure 2. United States bathymetry distribution. ........................................................ 11

Figure 3. Distance from United States shoreline (nm)................................................ 12

Figure 4. State administrative areas. ........................................................................... 13

Figure B1. United States offshore wind resource at 90 m above the surface. ............... 44

Figure B2. California detailed map................................................................................ 46

Figure B3. Connecticut detailed map............................................................................. 48

Figure B4. Delaware detailed map................................................................................. 50

Figure B5. Georgia detailed map ................................................................................... 52

Figure B6. Hawaii detailed map .................................................................................... 54

Figure B7. Illinois detailed map..................................................................................... 56

Figure B8. Indiana detailed map.................................................................................... 58

Figure B9. Louisiana detailed map ................................................................................ 60

Figure B10. Maine detailed map...................................................................................... 62

Figure B11. Maryland detailed map ................................................................................ 64

Figure B12. Massachusetts detailed map......................................................................... 66

Figure B13. Michigan detailed map................................................................................. 68

Figure B14. Minnesota detailed tables and maps ............................................................ 70

Figure B15. New Hampshire detailed map...................................................................... 72
vi

Figure B16. New Jersey detailed map ............................................................................. 74

Figure B17. New York detailed map ............................................................................... 76

Figure B18. North Carolina detailed map........................................................................ 78

Figure B19. Ohio detailed map........................................................................................ 80

Figure B20. Oregon detailed map.................................................................................... 82

Figure B21. Pennsylvania detailed map........................................................................... 84

Figure B22. Rhode Island detailed map........................................................................... 86

Figure B23. South Carolina detailed map........................................................................ 88

Figure B24. Texas detailed map ...................................................................................... 90

Figure B25. Virginia detailed map................................................................................... 92

Figure B26. Washington detailed map............................................................................. 94

Figure B27. Wisconsin detailed map ............................................................................... 96
1

Executive Summary

This report summarizes the offshore wind resource potential, based on map estimates, for

the contiguous United States and Hawaii, as of May 2009. The development of this 

assessment has evolved over multiple stages as new regional meso-scale assessments 

became available, new validation data were obtained, and better modeling capabilities 

were implemented. It is expected that further updates to the current assessment will be 

made in future reports. 

Offshore wind energy development promises to be a significant domestic renewable 

energy source, especially for coastal energy loads with limited access to interstate grid 

transmission. The definition of the magnitude and distribution of this resource required

the development of a standard and flexible database. Developed using Geographic 

Information System (GIS) techniques, the database includes offshore wind resource 

characteristics such as wind speed, water depth, and distance from shore. It combines the 

resource characteristics with state administrative areas and quantifies the resource for 

several scenarios. In the future, the database may be expanded to include other important 

characteristics such as wave power density, extreme wind and wave, ocean currents, and 

a number of other parameters important to the design of offshore wind turbines.

The primary method used to present the offshore wind resource data are maps that 

categorize the resource by annual average wind speed at 90 meters (m) above the surface. 

The resource maps extend from the shoreline out to 50 nautical miles (nm) offshore. 

Exceptions to the 50 nm mapped distance are the Great Lakes that were mapped in their 

entirety for the offshore resource and Massachusetts, where the computed resource did 

not extend 50 nm from the edge of the Nantucket Island and Martha’s Vineyard in 

southeastern Massachusetts. The offshore maps for some states do not extend 50 nm 

because of state and administrative boundaries.

There were several sources for the offshore resource maps. The oldest offshore wind 

resource maps were generated from data mapped as part of onshore state wind resource 

mapping projects. Recently, some regions have had their resource maps updated using the 

latest computer mapping techniques optimized for offshore modeling. For this

evaluation, updated maps were available for the offshore areas of Georgia, 

Texas/Louisiana, northern New England (Massachusetts, New Hampshire, and Maine),

and states that border the Great Lakes. The preliminary numerical modeling was 

performed by AWS Truepower (AWST), of Albany, New York, under subcontract to the 

National Renewable Energy Laboratory (NREL), using their proprietary MesoMap

system. The preliminary model estimates were validated by NREL using data from a 

variety of sources including ocean buoys, marine automated stations, Coast Guard 

stations and lighthouses, and satellite-derived 10-m wind speeds over the ocean estimated 

from the “state of the sea” as measured by microwave imaging. Final modifications to 

the preliminary estimates were agreed to after consultations between NREL and AWST. 

AWST adjusted the model output to reflect the modifications and sent the final grids to 

NREL, where the data were converted into wind resource maps. The calculation of the 

offshore wind resource estimates for states without updated maps depended on the 

availability of older offshore wind maps that were completed as part of onshore wind 
2

mapping projects. Where older preliminary and final offshore wind maps were available, 

the wind speed data from those maps were interpolated to 90 m height and, if necessary, 

extrapolated to the 50 nm lines. The offshore areas treated in this manner included the 

Atlantic coast, from Rhode Island to South Carolina, the Pacific coast, from California to 

Washington, and Hawaii. The states of Florida, Alabama, and Mississippi did not have 

any preliminary or final wind maps available. The offshore wind resource for these states 

is not included in this report.

Table 1 shows the offshore wind resource by available square kilometers (km2

) of water 

and potential installed capacity in gigawatts (GW) for annual average wind speeds greater 

than 7.0 meters/second (m/s) at 90 m above the surface. A uniform factor of 5 

megawatts/km2 was applied to calculate the potential installed capacity. The resource is 

presented for individual states and the country as a whole. These resource estimates have 

not been reduced by any environmental or water-use considerations. Detailed 

information by database element for each state is presented in Appendix B. The data 

presented in this report represents the first version of the offshore database.
3

Table 1. Offshore wind resource area and potential by wind speed interval and state within 

50 nm of shore.

Wind Speed (m/s) at 90 m 

7.0 - 7.5 7.5 - 8.0 8.0 - 8.5 8.5 - 9.0 9.0 - 9.5 9.5 - 10.0 >10.0

Total 

>7.0

State

km2

(GW)

km2

(GW)

km2

(GW)

km2

(GW)

km2

(GW)

km2

(GW)

km2

(GW)

km2

(GW)

California 11,439 24,864 23,059 22,852 13,185 15,231 6,926 117,555

(57.2) (124.3) (115.3) (114.3) (65.9) (76.2) (34.6) (587.8)

Connecticut 530 702 40 0 0 0 0 1,272

(2.7) (3.5) (0.2) (0.0) (0.0) (0.0) (0.0) (6.4)

Delaware 223 724 1,062 931 0 0 0 2,940

(1.1) (3.6) (5.3) (4.7) (0.0) (0.0) (0.0) (14.7)

Georgia 3,820 7,741 523 0 0 0 0 12,085

(19.1) (38.7) (2.6) (0.0) (0.0) (0.0) (0.0) (60.4)

Hawaii 18,873 42,298 33,042 13,913 7,779 6,720 4,852 127,477

(94.4) (211.5) (165.2) (69.6) (38.9) (33.6) (24.3) (637.4)

Illinois 92 166 3,844 90 0 0 0 4,192

(0.5) (0.8) (19.2) (0.4) (0.0) (0.0) (0.0) (21.0)

Indiana 82 216 286 0 0 0 0 584

(0.4) (1.1) (1.4) (0.0) (0.0) (0.0) (0.0) (2.9)

Louisiana 48,043 15,032 0 0 0 0 0 63,075

(240.2) (75.2) (0.0) (0.0) (0.0) (0.0) (0.0) (315.4)

Maine 906 1,142 1,976 3,331 8,429 15,485 42 31,311

(4.5) (5.7) (9.9) (16.7) (42.1) (77.4) (0.2) (156.6)

Maryland 2,192 1,946 1,540 5,078 0 0 0 10,756

(11.0) (9.7) (7.7) (25.4) (0.0) (0.0) (0.0) (53.8)

Massachusetts 202 526 1,639 3,606 20,351 13,674 0 39,997

(1.0) (2.6) (8.2) (18.0) (101.8) (68.4) (0.0) (200.0)

Michigan 4,459 18,074 31,086 34,305 8,719 0 0 96,642

(22.3) (90.4) (155.4) (171.5) (43.6) (0.0) (0.0) (483.2)

Minnesota 3,102 994 0 0 0 0 0 4,096

(15.5) (5.0) (0.0) (0.0) (0.0) (0.0) (0.0) (20.5)

New Hampshire 19 46 171 336 102 0 0 672

(0.1) (0.2) (0.9) (1.7) (0.5) (0.0) (0.0) (3.4)

New Jersey 528 1,508 4,965 12,934 0 0 0 19,935

(2.6) (7.5) (24.8) (64.7) (0.0) (0.0) (0.0) (99.7)

New York 1,105 4,358 8,324 2,876 7,453 5,322 0 29,439

(5.5) (21.8) (41.6) (14.4) (37.3) (26.6) (0.0) (147.2)

North Carolina 1,847 4,098 13,655 39,875 16 0 0 59,491

(9.2) (20.5) (68.3) (199.4) (0.1) (0.0) (0.0) (297.5)

Ohio 341 3,067 5,829 0 0 0 0 9,237

(1.7) (15.3) (29.1) (0.0) (0.0) (0.0) (0.0) (46.2)

Oregon 388 1,493 8,644 13,925 7,394 6,065 5,986 43,894

(1.9) (7.5) (43.2) (69.6) (37.0) (30.3) (29.9) (219.5)
4

Table 1 (continued) Offshore wind resource area and potential by wind speed interval and 

state within 50 nm of shore.

Wind Speed (m/s) at 90 m 

7.0 - 7.5 7.5 - 8.0 8.0 - 8.5 8.5 - 9.0 9.0 - 9.5 9.5 - 10.0 >10.0

Total 

>7.0

Pennsylvania 34 211 1,679 0 0 0 0 1,924

(0.2) (1.1) (8.4) (0.0) (0.0) (0.0) (0.0) (9.6)

Rhode Island 224 126 283 671 1,461 2,360 0 5,126

(1.1) (0.6) (1.4) (3.4) (7.3) (11.8) (0.0) (25.6)

South Carolina 1,457 8,202 10,384 6,007 0 0 0 26,049

(7.3) (41.0) (51.9) (30.0) (0.0) (0.0) (0.0) (130.2)

Texas 2,019 24,823 16,556 12,273 0 0 0 55,671

(10.1) (124.1) (82.8) (61.4) (0.0) (0.0) (0.0) (278.4)

Virginia 889 3,658 6,549 7,794 0 0 0 18,890

(4.4) (18.3) (32.7) (39.0) (0.0) (0.0) (0.0) (94.4)

Washington 1,573 4,621 18,261 0 0 0 0 24,455

(7.9) (23.1) (91.3) (0.0) (0.0) (0.0) (0.0) (122.3)

Wisconsin 3,715 3,405 7,761 8,417 0 0 0 23,298

(18.6) (17.0) (38.8) (42.1) (0.0) (0.0) (0.0) (116.5)

Total 108,102 174,040 201,159 189,213 74,888 64,856 17,805 830,064

(540.5) (870.2) (1,005.8) (946.1) (374.4) (324.3) (89.0) (4,150.3)
5

Offshore Wind Resource

In May 2008, the U.S. Department of Energy (DOE) released a report detailing a 

deployment scenario by which the United States could achieve 20% of its electric energy 

supply from wind energy (U.S. Department of Energy 2008). Under this scenario, 

offshore wind was an essential contributor, providing 54 gigawatts of installed electric 

capacity to the grid. When President Obama took office in January 2009, his message 

clearly reinforced this challenge in a broader context of energy independence, 

environmental stewardship, and a strengthened economy based on clean renewable 

energy sources. 

To achieve the deployment levels described in the 20% wind report, many technical and 

economic challenges must be faced. Many coastal areas in the United States have large 

electricity demand but have limited access to a high-quality land-based wind resource,

and these areas are typically limited in their access to interstate grid transmission. 

Offshore wind resources have the potential to be a significant domestic renewable energy 

source for coastal electricity loads. The development of a reference and validated

offshore wind resource database is one of the first steps necessary to understand the 

magnitude of the resource and to plan the distribution and development of future offshore 

wind power facilities. 

DOE and the National Renewable Energy Laboratory (NREL) are working to assess the 

full potential of the nation’s indigenous wind energy resources by creating a validated, 

national database that defines the significant characteristics used to quantify resource

availability and its distribution. These elements include level of resource (annual average 

wind speed), water depth, distance from shore, and state administrative areas. The 

database will be periodically revised to reflect better wind resource estimates and to 

include updated information from other datasets.

This database serves as the foundation for future modifications that may include specific 

exclusion areas for the calculation of offshore wind resource potential. Earlier estimates 

of offshore wind potential in the United States made conservative assumptions to exclude 

large areas from development, based on their distance from shore (Musial and Butterfield 

2004). In the 2004 study, all wind resources within 5 nautical miles (nm) of shore were 

excluded from development, two-thirds of the resource, 5 nm to 20 nm from shore, was 

excluded, and one-third of the resource was excluded for those areas greater than 20 nm 

from shore. 

The paper by Musial and Butterfield detailed the rationale for exclusion factors but did 

not contain a detailed analysis of this subject. The basis for exclusion is a complex issue 

that should involve multiple stakeholders and negotiations. The development of offshore 

resources will be influenced by environmental and other ocean-use factors not currently 

included in the wind resource database.

Therefore, the current standard database quantifies the gross offshore wind resource. 

Exclusions from offshore development, of which there will be many, must be done on a 

state or regional basis to assure that local issues are addressed properly such as was 
6 

attempted for areas along the Atlantic coast (Dhanju et. al 2008, Applied Technology and 

Management 2007). 

The database provides the core information useful for the planning of resource-based 

offshore renewable energy development. The database incorporates the best offshore 

wind resource estimates with parameters that have a significant impact on offshore 

resource development. The main parameters include annual average wind speed, water 

depth (U.S. Department of Commerce's National Oceanic and Atmospheric 

Administration's [NOAA] Coastal Relief Model), distance from shore (shoreline 

delineation by NOAA), and administrative jurisdiction (U.S. Department of the Interior's 

Minerals Management Service [MMS]). As previously mentioned, the database was 

developed using Geographic Information Systems (GIS) techniques, allowing for spatial 

correlation of these characteristics. The offshore information presented on a state-bystate basis in this report is the first published version of the NREL offshore database. 

The database will be updated periodically as new offshore wind resource studies are 

completed and/or new information layers become available that directly impact offshore 

development. 

GIS Database Structure

A GIS database was chosen to house the offshore resource data because the datasets have 

a significant spatial component. All of the component datasets are spatially referenced to 

the same spatial base allowing rapid indexing of the different datasets to each other. A 

database user may compare information from different datasets in the same geographic 

location. The GIS database also allows portions of a dataset to be quickly updated as new 

information becomes available. The database is sufficiently flexible to allow new 

elements such as environmental exclusion areas and shipping lanes/navigation zones, for 

example, to be included in future versions. The horizontal resolution of the database grid 

cells is 100 m by 100 m. The database extends out from the shoreline to 50 nm and 

includes major bays and inlets. Exceptions to the 50 nm mapped distance are the Great 

Lakes, where the entire lakes were mapped for the offshore resource, and Massachusetts, 

where the computed resource did not extend 50 nm from the edge of Nantucket Island 

and Martha’s Vineyard in southeastern Massachusetts.

For ease of use and maintenance, the database has been divided into four regions initially: 

1) Pacific coast (California, Oregon and Washington); 2) Atlantic coast (Maine, New 

Hampshire, Massachusetts, Rhode Island, Connecticut, New York, New Jersey, 

Delaware, Maryland, Virginia, North Carolina, South Carolina, Georgia, and Florida);

Lakes (New York, Pennsylvania, Ohio, Michigan, Indiana, Illinois, Wisconsin, and 

Minnesota). Hawaii, Alaska, and U.S. territories are handled separately.

3) Gulf of Mexico (Florida, Alabama, Mississippi, Louisiana, and Texas); and 4) Great 

Database Components

The database contains wind resource information in two types of fields. The first field is 

wind power class introduced in the “Wind Energy Resource Atlas of the United States”

(Elliott et. al. 1987) at a 50 m height above the surface. The second field is the annual 
7

average wind speed at 90 m above the surface, the approximate hub-height of many 

current-day offshore wind turbines. This report presents information from this second 

field in the maps, figures, and tables in the body and appendices. The annual speeds in

the database are binned in 0.25 meters per second (m/s) intervals, with the speed in the 

database defined as the midpoint of the interval. For example, a grid cell with an annual 

speed between 7.0 and 7.25 m/s receives a database value of 7.125 m/s. The speeds (and 

power classes) are binned because the elements in the database are required to be

represented in discrete intervals. The database indexes wind resource potential by water 

depth at intervals of 10 m, distance from shore out to 50 nm in increments of 1 nm, and 

the best available offshore state and federal administrative boundaries, provided primarily 

by the MMS. Indexing allows the database to be summarized in different ways using 

these attributes (e.g. resource within 0-5 nm or 0-3 nm of shoreline).

Wind Resource Estimates

Annual average wind speeds are closely related to the available energy at a particular 

location and are categorized in the database by their value at a height of 90 m above the 

surface. The offshore wind resources of the United States were first estimated by NREL 

in 2003 (Musial and Butterfield 2004). Since then, updated offshore wind mapping 

projects (e.g. Elliott and Schwartz 2006) are gradually being completed. The updated 

maps provide a better estimate of the offshore wind resource than was previously 

available. At present, updated maps are available for the offshore areas of Georgia, 

Texas/Louisiana, northern New England (Massachusetts, New Hampshire, and Maine) 

and the states bordering the Great Lakes. 

The updated wind resource maps were produced using a physics-based numerical 

computer model that provided preliminary estimates of the annual average wind resource. 

The modeling was developed by AWS Truepower (AWST) of Albany, New York, under 

subcontract to NREL, using their proprietary MesoMap system. The horizontal 

resolution of the model output is 200 m. The preliminary model estimates were validated 

by NREL using data from a variety of sources including ocean buoys, marine automated 

stations, Coast Guard stations and lighthouses, and satellite-derived 10 m wind speeds 

over the ocean estimated from the “state of the sea” as measured by microwave imaging. 

The wind measurements from the stations or grid points (in the case of satellite 

measurements) were extrapolated to 50 m above the surface and compared to the model 

estimates at the same height using sheer exponents from the Power Law Equation (Elliott 

et. al. 1987). The results of the validation model-measurement comparison were 

assembled into a spreadsheet and reviewed by AWST. In addition, NREL also produced

qualitative comments on the validation results including recommended modifications to 

the preliminary resource estimates. Final modifications were agreed to after 

consultations between NREL and AWST. AWST adjusted the model output to reflect the 

modifications. There were not sufficient tall tower data to perform a high-quality 

validation at 90 m. Therefore, the modifications to the preliminary 90 m wind speed 

model output were based on the 50 m validation results. This adds some uncertainty to 

the final potential estimates, but should not significantly affect the scope of the offshore 

potential. NREL converted the final data into wind resource maps. The wind resource 
8

data were re-sampled from 200 m to 100 m horizontal resolution for inclusion in the 

database.

Calculations of the offshore wind resource estimates for states with older offshore wind 

maps (originally completed as part of an onshore wind mapping project) were done in 

two ways. For eight states, data from an older non-validated preliminary (model 

estimate) offshore wind map and a validated older final map were combined to calculate

the offshore resource. Preliminary non-validated maps were used because: 1) older final

wind maps extended only 5-10 nm offshore, while the preliminary maps extended further 

off the coast, thus reducing the area extrapolated to 50 nm; and 2) using the preliminary 

data resulted in more realistic offshore wind speed gradients than the gradients produced

by extrapolating the older final map values from their seaward edges out to an additional 

40-45 nm to the 50 nm line. Older final maps for five states (including the Atlantic coast 

of New York) extended either to the 50 nm line or the state boundary. In these cases, the 

data from the older final map was used to calculate the offshore potential without

extrapolation. The complete listing of the older and updated offshore maps used for this 

project is in Appendix A. The states of Florida, Alabama, and Mississippi did not have 

any preliminary or final wind maps available. The lack of tall tower wind measurement 

data and offshore wind maps for this region made an estimate of the 90 m wind speeds 

problematic. Therefore, the offshore wind resource for these states was not included in 

this report. They will be included in the database once updated offshore maps for these 

states are complete.

The 90 m average wind speeds were calculated in several ways depending on the 

available height of the older preliminary and final map data. The states along the Atlantic 

coast from Rhode Island to North Carolina, and the state of Hawaii had offshore map 

wind speed values at 70 m and 100 m above the surface. For these states, the 90 m wind 

speed was calculated by a linear interpolation between the 70 m and 100 m wind speeds. 

The states of South Carolina, Washington, and Oregon had only 50 m map wind speeds 

available. The 90 m wind speeds for these states were calculated using a power law wind 

speed shear exponent (Elliott et. al. 1987) of 0.11. This exponent value was chosen based 

on the validation experience with the updated offshore wind maps and because other

analyses of offshore wind resources indicate that the shear exponent is most often in the 

range from 0.08 to 0.14 for the offshore regions of the United States. The wind speeds at 

90 m were about 6.5% higher than the 50 m wind speeds using the 0.11 shear exponent. 

Wind speed maps at 50 m and 70 m were available for California. The 90 m speed off 

the California coast was calculated assuming the speed shear exponent calculated 

between the 50 m and 70 m levels was also valid for the wind speeds between 70 m and 

90 m.

For eight states (the Pacific coast and the Atlantic Coast from New Jersey to North 

Carolina), where both the older preliminary and final maps were used to estimate the 

wind resource, a blend of the calculated 90 m speeds from the preliminary and final maps 

was used to extrapolate the offshore potential to 50 nm. Speed values from the final maps 

were used to calculate the wind resource from close to shore out to the boundary between 

the final and preliminary maps. The speed at this boundary was calculated as a blend of 

the two final and preliminary map values. The preliminary map wind speeds were used 
9

from this boundary to the seaward edge of the preliminary map data. The wind speed 

values at the seaward edge of the preliminary map were held constant and expanded to 

the 50 nm line. The extrapolation from the edge of the preliminary map is a source of 

uncertainty in the final results for these eight states.

Horizontal discontinuities (seams) in the wind resource are present at several state 

boundaries. The discontinuities result from offshore data that is based on different

versions of the numerical model used for the different onshore mapping projects and the

way the extrapolation software interprets the data on either side of the seam. The most 

prominent seam appears near the border of Oregon and California. The resulting wind 

speed gradients in that region are not realistic. Other noticeable seams are located on the 

borders of New York and New Jersey and North Carolina and South Carolina. These 

seams in the maps and data interpretations further demonstrate the need to complete the 

updated offshore wind resource maps along the Atlantic and Pacific coasts.

Individual state and regional datasets were combined to form a composite image, based 

on 2009 map estimates, of the national offshore wind resource (Figure 1). The datasets 

are listed in Appendix A. The wind resource information is categorized by wind speed. 

However, for this initial report only areas with annual average wind speeds of 7.0 m/s 

and greater are included in the wind potential estimates. Economic factors make 

development of areas with less than 7.0 m/s average wind speeds unlikely. This 

delineation may be adjusted in future versions of the database as warranted. 

Examinations of the offshore wind resource distribution show an abundant wind resource 

pool, with wind resources greater than 7.0 m/s, located in many offshore areas of the 

country. 

Bathymetry

The depth of the water affects the type of technology used to develop a given offshore 

wind resource project (Musial 2007). Current offshore wind turbine technology uses 

monopoles and gravity foundations in shallow water (0 m to 30 m). In transitional depths 

(30 m to 60 m), tripods, jackets and truss-type towers will be used. Deep water (> 60 m 

depth) may require floating structures instead of fixed bottom foundations, but this 

technology is currently in an early stage of development. 

The bathymetry data used in the database has been categorized into 10 m water depth 

intervals, with depth calculated relative to the mean water surface height (Figure 2). The

majority of the data was acquired from the U.S. Department of Commerce National

Oceanic and Atmospheric Administration (NOAA) Coastal Relief Model. This dataset

has a spatial resolution of 90 m. However, Lake Superior and some coastal areas further 

from shore were not included in the NOAA dataset. For those areas, bathymetry was 

interpolated from a spatially coarser global NOAA bathymetry dataset.

The East coast and the Gulf of Mexico have extensive areas of shallow water relatively 

far from shore. On the West coast, the continental shelf descends rapidly into the deep 

water category. The water depth also increases rapidly away from shore around Hawaii. 

In the Great Lakes region, Lake Erie and portions of Lake Ontario can be characterized as 
10

shallow; the other lakes are primarily deep water, with narrow bands of shallow and 

transitional water near the shore.

Figure 1. United States offshore wind resource at 90 m above the surface.
11

Figure 2. United States bathymetry distribution.

Distance From Shore

The distance a wind project is from shore determines a project’s visibility from shore, 

and whether it is located in state or federal jurisdiction. Distance affects the potential 

cost of development through considerations such as the length of underwater cable 

needed to connect the offshore wind project to land-based electricity distribution 

facilities. In addition, coastline definition is complex because it is derived from a series 

of baseline points representing the mean lower low water line in direct contact with the 

open ocean (Thormahlen 1999). Some of these points can be seaward of the contiguous 

shoreline and change over time due to accretion and erosion of the shoreline. The MMS

computed geographic lines from these points determining the boundary of state/federal 

offshore jurisdictions required by the Submerged Lands Act (SLA) (Thormahlen 1999). 

In Hawaii, the state/federal boundary was determined by NOAA. The database uses nm 

in its distance calculations. Federal jurisdiction begins 3 nm from the MMS baseline, 

except for Texas and the Gulf coast of Florida, where it begins at 9 nm. For the Atlantic 

coast, Pacific coast, and Gulf of Mexico distances are measured from the SLA line 

towards or away from shore, extending seaward a maximum of 50 nm. For the Great 

Lakes and Hawaii, distances were measured from the shoreline (Figure 3).
12

Figure 3. Distance from United States shoreline (nm).

Offshore Administrative Units

The determination of offshore jurisdiction encompasses complex legal agreements 

between individual states, legal agreements between the individual states and the federal 

government, and treaties between the United States and adjacent countries. Some of 

these boundaries are currently unresolved (New Jersey v. Delaware, Supreme Court 

Decision No. 134 Original, October Term 2007, and Thormahlen 1999). The 

state/federal offshore boundary is determined by the SLA and individual Supreme Court 

decisions for Texas and Florida (Thormahlen 1999). Seaward of the SLA, the MMS has 

proposed state boundaries that extend from the SLA line to the limit of the United States 

Outer Continental Shelf (OCS) based on the United Nations Convention on the Law of 

the Sea (Federal Register). Landward of the SLA line, state boundaries are based on 

legal agreements dating back to the Colonial period. A national dataset is still under 

development by the MMS and NOAA. For this report, NREL constructed an offshore 

administrative boundaries dataset from the MMS SLA, OCS, and OCS Administrative 

Boundaries, and individual state and local government administrative boundary datasets 

(Figure 4, by color). Where there was no available state data landward of the SLA, 

NREL constructed lines from the SLA to the shoreline. The list of data sources is 

provided in Appendix A.
13

Figure 4. State administrative areas.

Database Summary 

The offshore wind resource database contains the wind resource, water depth, distance

from shore, and administrative unit for each 100 m by 100 m area out to a distance of 50 

nm. The data consist of the gross wind energy resources without considering any 

exclusion areas. In other words, these tables do not exclude the wind resource as a 

function of distance from shore (Musial and Butterfield 2004), nor do they exclude the 

available resource due to environmental and other ocean-use factors. These data are the 

best available offshore wind resource data at present. The uncertainty of these resource 

estimates will significantly decrease as additional updated maps are completed.

Table 2 shows the gross wind resource at 90 m by state. The available square kilometers 

(km2) of water and potential installed capacity in gigawatts (GW) is presented by wind 

speed interval (for annual wind speeds 7.0 m/s and higher), water depth, and distance 

from shore. A uniform factor of 5 megawatts/km2 was applied to calculate the potential 

installed capacity. Detailed information by database element for each state is presented in 

Appendix B. 
14

Table 2. Offshore wind resource area by state with potential by wind speed interval, water depth, distance from shore 

Distance from Shoreline

0 - 3 nm 3 - 12 nm 12 - 50 nm

Wind Depth Category (m) Depth Category (m) Depth Category (m)

Speed 0 - 30 30 - 60 > 60 0 - 30 30 - 60 > 60 0 - 30 30 - 60 > 60 Total

at 90m km2 km2 km2 km2 km2 km2 km2 km2 km2 km2

State m/s (GW) (GW) (GW) (GW) (GW) (GW) (GW) (GW) (GW) (GW)

California 7.0-7.5 266.2 236.2 257.4 100.9 456.8 4,554.0 7.7 22.9 5,536.8 11,438.9

(1.3) (1.2) (1.3) (0.5) (2.3) (22.8) (0.0) (0.1) (27.7) (57.2)

7.5-8.0 239.1 256.9 189.6 78.8 595.7 3,854.6 0.0 32.9 19,616.1 24,863.7

(1.2) (1.3) (0.9) (0.4) (3.0) (19.3) (0.0) (0.2) (98.1) (124.3)

8.0-8.5 125.2 178.2 281.8 7.1 105.8 4,539.1 0.0 0.0 17,822.2 23,059.3

(0.6) (0.9) (1.4) (0.0) (0.5) (22.7) (0.0) (0.0) (89.1) (115.3)

8.5-9.0 43.2 141.7 176.4 0.6 38.0 4,559.8 0.0 0.0 17,892.0 22,851.6

(0.2) (0.7) (0.9) (0.0) (0.2) (22.8) (0.0) (0.0) (89.5) (114.3)

9.0-9.5 2.1 18.8 14.9 0.0 0.9 988.0 0.0 0.0 12,160.2 13,184.8

(0.0) (0.1) (0.1) (0.0) (0.0) (4.9) (0.0) (0.0) (60.8) (65.9)

9.5-10.0 0.0 6.0 13.9 0.0 0.0 656.1 0.0 0.0 14,554.8 15,230.7

(0.0) (0.0) (0.1) (0.0) (0.0) (3.3) (0.0) (0.0) (72.8) (76.2)

>10.0 0.0 0.0 0.1 0.0 0.0 288.1 0.0 0.0 6,637.6 6,925.8

(0.0) (0.0) (0.0) (0.0) (0.0) (1.4) (0.0) (0.0) (33.2) (34.6)

Connecticut 7.0-7.5 500.1 30.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 530.4

(2.5) (0.2) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (2.7)

7.5-8.0 617.3 83.0 1.2 0.0 0.0 0.0 0.0 0.0 0.0 701.6

(3.1) (0.4) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (3.5)

8.0-8.5 34.6 5.0 0.4 0.0 0.0 0.0 0.0 0.0 0.0 40.1

(0.2) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.2)

Delaware 7.0-7.5 223.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 223.2

(1.1) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (1.1)

7.5-8.0 716.5 2.0 0.0 5.2 0.0 0.0 0.0 0.0 0.0 723.7

(3.6) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (3.6)

8.0-8.5 135.4 10.5 0.0 658.0 8.6 0.0 240.4 8.9 0.0 1,061.9

(0.7) (0.1) (0.0) (3.3) (0.0) (0.0) (1.2) (0.0) (0.0) (5.3)

8.5-9.0 0.0 0.0 0.0 0.0 0.0 0.0 254.0 677.4 0.0 931.4

(0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (1.3) (3.4) (0.0) (4.7)
15

Table 2 (continued). Offshore wind resource area by state with potential by wind speed interval, water depth, distance from shore

Distance from Shoreline

0 - 3 nm1 3 - 12 nm 12 - 50 nm

Wind Depth Category (m) Depth Category (m) Depth Category (m)

Speed 0 - 30 30 - 60 > 60 0 - 30 30 - 60 > 60 0 - 30 30 - 60 > 60 Total

at 90m km2 km2 km2 km2 km2 km2 km2 km2 km2 km2

State m/s (GW) (GW) (GW) (GW) (GW) (GW) (GW) (GW) (GW) (GW)

Georgia 7.0-7.5 547.5 0.0 0.0 2,162.3 0.0 0.0 1,110.6 0.0 0.0 3,820.4

(2.7) (0.0) (0.0) (10.8) (0.0) (0.0) (5.6) (0.0) (0.0) (19.1)

7.5-8.0 85.2 0.0 0.0 529.6 0.0 0.0 5,204.3 1,922.1 0.0 7,741.2

(0.4) (0.0) (0.0) (2.6) (0.0) (0.0) (26.0) (9.6) (0.0) (38.7)

8.0-8.5 0.0 0.0 0.0 0.0 0.0 0.0 3.9 519.5 0.0 523.4

(0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (2.6) (0.0) (2.6)

Hawaii 7.0-7.5 111.5 97.2 2,631.5 0.0 42.6 2,213.3 44.4 116.8 13,615.3 18,872.6

(0.6) (0.5) (13.2) (0.0) (0.2) (11.1) (0.2) (0.6) (68.1) (94.4)

7.5-8.0 65.5 107.0 2,404.0 0.0 145.0 5,051.6 6.9 250.7 34,267.6 42,298.3

(0.3) (0.5) (12.0) (0.0) (0.7) (25.3) (0.0) (1.3) (171.3) (211.5)

8.0-8.5 92.2 114.8 2,364.3 0.0 15.0 4,755.7 0.2 0.3 25,699.5 33,042.0

(0.5) (0.6) (11.8) (0.0) (0.1) (23.8) (0.0) (0.0) (128.5) (165.2)

8.5-9.0 65.6 67.0 2,105.2 0.0 0.0 2,625.5 0.0 0.0 9,050.0 13,913.3

(0.3) (0.3) (10.5) (0.0) (0.0) (13.1) (0.0) (0.0) (45.3) (69.6)

9.0-9.5 25.7 39.0 995.6 0.0 0.0 1,853.0 0.0 0.0 4,865.5 7,778.8

(0.1) (0.2) (5.0) (0.0) (0.0) (9.3) (0.0) (0.0) (24.3) (38.9)

9.5-10.0 22.0 39.8 666.0 0.0 0.0 1,064.9 0.0 0.0 4,926.8 6,719.6

(0.1) (0.2) (3.3) (0.0) (0.0) (5.3) (0.0) (0.0) (24.6) (33.6)

>10.0 26.3 70.5 1,344.0 0.0 0.0 2,027.6 0.0 0.0 1,383.5 4,852.0

(0.1) (0.4) (6.7) (0.0) (0.0) (10.1) (0.0) (0.0) (6.9) (24.3)

Illinois 7.0-7.5 91.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 91.6

(0.5) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.5)

7.5-8.0 164.6 0.0 0.0 0.0 0.1 0.0 0.0 1.3 0.0 166.0

(823.1) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.8)

8.0-8.5 244.2 1.0 0.0 830.4 512.2 140.7 7.1 426.1 1,682.8 3,844.5

(1.2) (0.0) (0.0) (4.2) (2.6) (0.7) (0.0) (2.1) (8.4) (19.2)

8.5-9.0 0.0 0.0 0.0 13.4 76.6 0.0 0.0 0.0 0.0 89.9

(0.0) (0.0) (0.0) (0.1) (0.4) (0.0) (0.0) (0.0) (0.0) (0.4)
16

Table 2 (continued). Offshore wind resource area by state with potential by wind speed interval, water depth, distance from shore

Distance from Shoreline

0 - 3 nm1 3 - 12 nm 12 - 50 nm

Wind Depth Category (m) Depth Category (m) Depth Category (m)

Speed 0 - 30 30 - 60 > 60 0 - 30 30 - 60 > 60 0 - 30 30 - 60 > 60 Total

at 90m km2 km2 km2 km2 km2 km2 km2 km2 km2 km2

State m/s (GW) (GW) (GW) (GW) (GW) (GW) (GW) (GW) (GW) (GW)

Indiana 7.0-7.5 82.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 82.1

(0.4) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.4)

7.5-8.0 153.8 0.0 0.0 62.6 0.0 0.0 0.0 0.0 0.0 216.3

(0.8) (0.0) (0.0) (0.3) (0.0) (0.0) (0.0) (0.0) (0.0) (1.1)

8.0-8.5 101.5 0.0 0.0 184.0 0.0 0.0 0.0 0.0 0.0 285.5

(0.5) (0.0) (0.0) (0.9) (0.0) (0.0) (0.0) (0.0) (0.0) (1.4)

Louisiana 7.0-7.5 7,759.6 28.6 0.0 7,825.2 643.4 1,460.4 11,163.9 5,479.1 13,682.4 48,042.7

(38.8) (0.1) (0.0) (39.1) (3.2) (7.3) (55.8) (27.4) (68.4) (240.2)

7.5-8.0 155.3 0.0 0.0 1,624.5 0.0 0.0 8,169.9 2,228.7 2,854.1 15,032.5

(0.8) (0.0) (0.0) (8.1) (0.0) (0.0) (40.8) (11.1) (14.3) (75.2)

Maine 7.0-7.5 787.0 91.2 11.9 7.8 4.8 3.5 0.0 0.0 0.0 906.2

(3.9) (0.5) (0.1) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (4.5)

7.5-8.0 797.2 285.4 19.4 6.7 19.6 14.1 0.0 0.0 0.0 1,142.3

(4.0) (1.4) (0.1) (0.0) (0.1) (0.1) (0.0) (0.0) (0.0) (5.7)

8.0-8.5 777.0 440.8 74.2 63.4 385.6 234.5 0.0 0.0 0.0 1,975.6

(3.9) (2.2) (0.4) (0.3) (1.9) (1.2) (0.0) (0.0) (0.0) (9.9)

8.5-9.0 513.4 614.0 157.6 18.2 219.1 1,401.9 0.0 0.0 406.8 3,331.1

(2.6) (3.1) (0.8) (0.1) (1.1) (7.0) (0.0) (0.0) (2.0) (16.7)

9.0-9.5 142.2 390.0 309.2 25.9 469.0 3,504.1 0.0 57.8 3,530.9 8,429.2

(0.7) (2.0) (1.5) (0.1) (2.3) (17.5) (0.0) (0.3) (17.7) (42.1)

9.5-10.0 5.5 24.9 42.3 1.0 38.3 1,459.8 0.0 7.4 13,905.6 15,484.7

(0.0) (0.1) (0.2) (0.0) (0.2) (7.3) (0.0) (0.0) (69.5) (77.4)

>10.0 0.0 0.0 0.0 0.0 0.0 41.6 0.0 0.0 0.0 41.6

(0.0) (0.0) (0.0) (0.0) (0.0) (0.2) (0.0) (0.0) (0.0) (0.2)

Maryland 7.0-7.5 2,175.4 16.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2,192.0

(10.9) (0.1) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (11.0)

7.5-8.0 1,922.5 14.0 0.0 9.9 0.0 0.0 0.0 0.0 0.0 1,946.4

(9.6) (0.1) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (9.7)
17

Table 2 (continued). Offshore wind resource area by state with potential by wind speed interval, water depth, distance from shore

Distance from Shoreline

0 - 3 nm 3 - 12 nm 12 - 50 nm

Wind Depth Category (m) Depth Category (m) Depth Category (m)

Speed 0 - 30 30 - 60 > 60 0 - 30 30 - 60 > 60 0 - 30 30 - 60 > 60 Total

at 90m km2 km2 km2 km2 km2 km2 km2 km2 km2 km2

State m/s (GW) (GW) (GW) (GW) (GW) (GW) (GW) (GW) (GW) (GW)

Maryland 8.0-8.5 163.3 0.0 0.0 924.0 0.0 0.0 435.4 17.2 0.0 1,539.9

(cont.) (0.8) (0.0) (0.0) (4.6) (0.0) (0.0) (2.2) (0.1) (0.0) (7.7)

8.5-9.0 0.0 0.0 0.0 0.0 0.0 0.0 531.3 3,210.7 1,336.1 5,078.1

(0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (2.7) (16.1) (6.7) (25.4)

Massachusetts 7.0-7.5 201.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 201.6

(1.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (1.0)

7.5-8.0 521.4 4.7 0.0 0.0 0.0 0.0 0.0 0.0 0.0 526.1

(2.6) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (2.6)

8.0-8.5 927.4 327.3 28.6 78.2 152.0 125.5 0.0 0.0 0.0 1,639.1

(4.6) (1.6) (0.1) (0.4) (0.8) (0.6) (0.0) (0.0) (0.0) (8.2)

8.5-9.0 1,508.2 378.1 12.6 315.0 354.5 812.2 11.4 23.5 190.4 3,606.0

(7.5) (1.9) (0.1) (1.6) (1.8) (4.1) (0.1) (0.1) (1.0) (18.0)

9.0-9.5 1,137.0 322.6 20.0 2,696.9 1,418.6 1,006.5 1,689.9 5,051.8 7,007.4 20,350.7

(5.7) (1.6) (0.1) (13.5) (7.1) (5.0) (8.4) (25.3) (35.0) (101.8)

9.5-10.0 2.0 0.0 0.0 8.6 119.2 0.0 472.1 3,459.5 9,612.5 13,674.0

(0.0) (0.0) (0.0) (0.0) (0.6) (0.0) (2.4) (17.3) (48.1) (68.4)

Michigan 7.0-7.5 3,411.4 330.6 243.7 142.6 49.8 268.0 1.2 0.0 12.1 4,459.3

(17.1) (1.7) (1.2) (0.7) (0.2) (1.3) (0.0) (0.0) (0.1) (22.3)

7.5-8.0 4,632.7 1,258.2 635.3 3,069.0 2,916.4 2,991.0 14.2 108.5 2,448.4 18,073.7

(23.2) (6.3) (3.2) (15.3) (14.6) (15.0) (0.1) (0.5) (12.2) (90.4)

8.0-8.5 2,588.1 1,253.3 769.0 2,770.6 5,889.7 9,411.9 30.9 876.1 7,496.4 31,085.9

(12.9) (6.3) (3.8) (13.9) (29.4) (47.1) (0.2) (4.4) (37.5) (155.4)

8.5-9.0 138.7 156.2 396.5 145.1 550.6 8,580.8 118.5 1,383.9 22,834.5 34,304.7

(0.7) (0.8) (2.0) (0.7) (2.8) (42.9) (0.6) (6.9) (114.2) (171.5)

9.0-9.5 0.0 0.0 0.0 0.0 0.0 69.9 114.6 249.6 8,284.5 8,718.7

(0.0) (0.0) (0.0) (0.0) (0.0) (0.3) (0.6) (1.2) (41.4) (43.6)
18

Table 2 (continued). Offshore wind resource area by state with potential by wind speed interval, water depth, distance from shore 

Distance from Shoreline

0 - 3 nm 3 - 12 nm 12 - 50 nm

Wind Depth Category (m) Depth Category (m) Depth Category (m)

Speed 0 - 30 30 - 60 > 60 0 - 30 30 - 60 > 60 0 - 30 30 - 60 > 60 Total

at 90m km2 km2 km2 km2 km2 km2 km2 km2 km2 km2

State m/s (GW) (GW) (GW) (GW) (GW) (GW) (GW) (GW) (GW) (GW)

Minnesota 7.0-7.5 5.1 43.6 272.6 0.0 31.5 1,718.1 0.0 0.0 1,031.1 3,101.9

(0.0) (0.2) (1.4) (0.0) (0.2) (8.6) (0.0) (0.0) (5.2) (15.5)

7.5-8.0 0.0 0.1 12.7 0.0 0.0 60.8 0.0 0.0 920.7 994.3

(0.0) (0.0) (0.1) (0.0) (0.0) (0.3) (0.0) (0.0) (4.6) (5.0)

New Hampshire 7.0-7.5 18.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 18.6

(0.1) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.1)

7.5-8.0 45.8 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 45.8

(0.2) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.2)

8.0-8.5 44.6 29.7 0.0 6.9 75.5 14.0 0.0 0.0 0.0 170.6

(0.2) (0.1) (0.0) (0.0) (0.4) (0.1) (0.0) (0.0) (0.0) (0.9)

8.5-9.0 0.0 8.0 7.2 0.0 12.4 255.7 0.0 10.1 42.2 335.7

(0.0) (0.0) (0.0) (0.0) (0.1) (1.3) (0.0) (0.1) (0.2) (1.7)

9.0-9.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 35.2 66.4 101.6

(0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.2) (0.3) (0.5)

New Jersey 7.0-7.5 520.2 0.0 0.0 8.2 0.0 0.0 0.0 0.0 0.0 528.5

(2.6) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (2.6)

7.5-8.0 960.4 0.0 0.0 518.6 27.9 0.7 0.0 0.0 0.0 1,507.6

(4.8) (0.0) (0.0) (2.6) (0.1) (0.0) (0.0) (0.0) (0.0) (7.5)

8.0-8.5 776.9 0.0 0.0 2,764.8 127.1 3.2 899.4 372.4 21.6 4,965.4

(3.9) (0.0) (0.0) (13.8) (0.6) (0.0) (4.5) (1.9) (0.1) (24.8)

8.5-9.0 13.1 0.0 0.0 214.7 0.0 0.0 2,019.5 10,382.4 303.8 12,933.5

(0.1) (0.0) (0.0) (1.1) (0.0) (0.0) (10.1) (51.9) (1.5) (64.7)

New York 7.0-7.5 1,047.9 54.2 0.0 2.8 0.0 0.0 0.0 0.0 0.0 1,104.8

(5.2) (0.3) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (5.5)

7.5-8.0 1,983.1 354.7 11.6 472.7 609.0 866.8 0.0 0.0 59.9 4,357.8

(9.9) (1.8) (0.1) (2.4) (3.0) (4.3) (0.0) (0.0) (0.3) (21.8)

8.0-8.5 1,329.3 602.9 196.5 375.6 535.7 3,122.0 42.2 12.6 2,107.4 8,324.1

(6.6) (3.0) (1.0) (1.9) (2.7) (15.6) (0.2) (0.1) (10.5) (41.6)
19

Table 2 (continued). Offshore wind resource area by state with potential by wind speed interval, water depth, distance from shore 

Distance from Shoreline

0 - 3 nm 3 - 12 nm 12 - 50 nm

Wind Depth Category (m) Depth Category (m) Depth Category (m)

Speed 0 - 30 30 - 60 > 60 0 - 30 30 - 60 > 60 0 - 30 30 - 60 > 60 Total

at 90m km2 km2 km2 km2 km2 km2 km2 km2 km2 km2

State m/s (GW) (GW) (GW) (GW) (GW) (GW) (GW) (GW) (GW) (GW)

New York 8.5-9.0 535.1 110.6 0.6 1,042.6 93.8 0.0 261.5 727.8 104.5 2,876.4

(cont.) (2.7) (0.6) (0.0) (5.2) (0.5) (0.0) (1.3) (3.6) (0.5) (14.4)

9.0-9.5 5.4 0.0 0.0 391.9 1,407.6 0.0 6.4 4,926.1 716.0 7,453.3

(0.0) (0.0) (0.0) (2.0) (7.0) (0.0) (0.0) (24.6) (3.6) (37.3)

9.5-10.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1,817.6 3,504.8 5,322.4

(0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (9.1) (17.5) (26.6)

North Carolina 7.0-7.5 1,847.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1,847.4

(9.2) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (9.2)

7.5-8.0 3,002.1 0.0 0.0 1,096.1 0.0 0.0 0.0 0.0 0.0 4,098.3

(15.0) (0.0) (0.0) (5.5) (0.0) (0.0) (0.0) (0.0) (0.0) (20.5)

8.0-8.5 3,920.0 0.1 0.1 4,653.8 0.0 0.0 4,034.9 746.5 299.2 13,654.7

(19.6) (0.0) (0.0) (23.3) (0.0) (0.0) (20.2) (3.7) (1.5) (68.3)

8.5-9.0 105.0 0.0 0.0 2,964.1 261.4 8.9 6,382.4 14,519.6 15,633.3 39,874.8

(0.5) (0.0) (0.0) (14.8) (1.3) (0.0) (31.9) (72.6) (78.2) (199.4)

9.0-9.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 16.0 0.0 16.0

(0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.1) (0.0) (0.1)

Ohio 7.0-7.5 341.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0 341.0

(1.7) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (1.7)

7.5-8.0 1,106.8 0.0 0.0 1,959.8 0.0 0.0 0.0 0.0 0.0 3,066.7

(5.5) (0.0) (0.0) (9.8) (0.0) (0.0) (0.0) (0.0) (0.0) (15.3)

8.0-8.5 565.2 0.0 0.0 2,193.1 0.0 0.0 3,071.2 0.0 0.0 5,829.5

(2.8) (0.0) (0.0) (11.0) (0.0) (0.0) (15.4) (0.0) (0.0) (29.1)

Oregon 7.0-7.5 355.8 20.6 0.0 0.9 9.2 1.2 0.0 0.0 0.0 387.6

(1.8) (0.1) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (1.9)

7.5-8.0 523.0 319.2 37.6 46.5 231.8 335.0 0.0 0.0 0.0 1,493.0

(2.6) (1.6) (0.2) (0.2) (1.2) (1.7) (0.0) (0.0) (0.0) (7.5)

8.0-8.5 198.3 277.0 6.6 19.0 595.7 2,558.5 0.0 0.0 4,989.5 8,644.4

(1.0) (1.4) (0.0) (0.1) (3.0) (12.8) (0.0) (0.0) (24.9) (43.2)
20

Table 2 (continued). Offshore wind resource area by state with potential by wind speed interval, water depth, distance from shore

Distance from Shoreline

0 - 3 nm 3 - 12 nm 12 - 50 nm

Wind Depth Category (m) Depth Category (m) Depth Category (m)

Speed 0 - 30 30 - 60 > 60 0 - 30 30 - 60 > 60 0 - 30 30 - 60 > 60 Total

at 90m km2 km2 km2 km2 km2 km2 km2 km2 km2 km2

State m/s (GW) (GW) (GW) (GW) (GW) (GW) (GW) (GW) (GW) (GW)

Oregon 8.5-9.0 64.1 98.8 0.6 0.0 108.0 1,967.2 0.0 45.6 11,640.3 13,924.6

(cont.) (0.3) (0.5) (0.0) (0.0) (0.5) (9.8) (0.0) (0.2) (58.2) (69.6)

9.0-9.5 64.1 55.4 38.6 0.0 32.6 614.9 0.0 0.0 6,588.2 7,393.7

(0.3) (0.3) (0.2) (0.0) (0.2) (3.1) (0.0) (0.0) (32.9) (37.0)

9.5-10.0 47.3 80.4 14.6 0.0 33.8 634.6 0.0 0.0 5,254.6 6,065.3

(0.2) (0.4) (0.1) (0.0) (0.2) (3.2) (0.0) (0.0) (26.3) (30.3)

>10.0 0.2 19.4 33.3 0.0 18.2 1,368.5 0.0 0.0 4,546.0 5,985.5

(0.0) (0.1) (0.2) (0.0) (0.1) (6.8) (0.0) (0.0) (22.7) (29.9)

Pennsylvania 7.0-7.5 34.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 34.2

(0.2) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.2)

7.5-8.0 113.4 0.0 0.0 53.2 44.2 0.0 0.0 0.0 0.0 210.8

(0.6) (0.0) (0.0) (0.3) (0.2) (0.0) (0.0) (0.0) (0.0) (1.1)

8.0-8.5 276.2 0.9 0.0 750.8 358.1 0.0 222.9 70.2 0.0 1,679.1

(1.4) (0.0) (0.0) (3.8) (1.8) (0.0) (1.1) (0.4) (0.0) (8.4)

Rhode Island 7.0-7.5 216.3 8.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 224.3

(1.1) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (1.1)

7.5-8.0 123.2 2.8 0.0 0.0 0.0 0.0 0.0 0.0 0.0 126.0

(0.6) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.6)

8.0-8.5 139.9 39.8 0.0 34.5 69.2 0.0 0.0 0.0 0.0 283.5

(0.7) (0.2) (0.0) (0.2) (0.3) (0.0) (0.0) (0.0) (0.0) (1.4)

8.5-9.0 120.3 93.0 0.0 183.6 274.2 0.0 0.0 0.0 0.0 671.2

(0.6) (0.5) (0.0) (0.9) (1.4) (0.0) (0.0) (0.0) (0.0) (3.4)

9.0-9.5 53.7 17.6 0.0 176.0 782.7 0.0 0.0 430.2 1.3 1,461.5

(0.3) (0.1) (0.0) (0.9) (3.9) (0.0) (0.0) (2.2) (0.0) (7.3)

9.5-10.0 0.0 0.0 0.0 0.0 5.8 0.0 0.0 967.2 1,386.8 2,359.8

(0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (4.8) (6.9) (11.8)
21

Table 2 (continued). Offshore wind resource area by state with potential by wind speed interval, water depth, distance from shore 

Distance from Shoreline

0 - 3 nm1 3 - 12 nm 12 - 50 nm

Wind Depth Category (m) Depth Category (m) Depth Category (m)

Speed 0 - 30 30 - 60 > 60 0 - 30 30 - 60 > 60 0 - 30 30 - 60 > 60 Total

at 90m km2 km2 km2 km2 km2 km2 km2 km2 km2 km2

State m/s (GW) (GW) (GW) (GW) (GW) (GW) (GW) (GW) (GW) (GW)

South Carolina 7.0-7.5 848.2 0.0 0.0 608.4 0.0 0.0 0.0 0.0 0.0 1,456.5

(4.2) (0.0) (0.0) (3.0) (0.0) (0.0) (0.0) (0.0) (0.0) (7.3)

7.5-8.0 593.5 0.0 0.0 3,053.9 0.0 0.0 4,267.6 287.0 0.0 8,202.1

(3.0) (0.0) (0.0) (15.3) (0.0) (0.0) (21.3) (1.4) (0.0) (41.0)

8.0-8.5 22.9 0.0 0.0 1,609.4 0.0 0.0 4,151.4 3,925.6 674.5 10,383.7

(0.1) (0.0) (0.0) (8.0) (0.0) (0.0) (20.8) (19.6) (3.4) (51.9)

8.5-9.0 0.0 0.0 0.0 0.0 0.0 0.0 2,027.0 3,109.7 869.9 6,006.5

(0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (10.1) (15.5) (4.3) (30.0)

Texas1 7.0-7.5 1,785.5 0.0 0.1 96.2 0.0 0.0 137.2 0.0 0.0 2,019.1

(8.9) (0.0) (0.0) (0.5) (0.0) (0.0) (0.7) (0.0) (0.0) (10.1)

7.5-8.0 9,046.1 0.0 0.0 1,165.2 0.0 0.1 8,045.2 6,174.7 391.5 24,822.7

(45.2) (0.0) (0.0) (5.8) (0.0) (0.0) (40.2) (30.9) (2.0) (124.1)

8.0-8.5 5,928.5 125.4 0.0 742.1 136.9 0.0 583.5 4,442.8 4,597.1 16,556.3

(29.6) (0.6) (0.0) (3.7) (0.7) (0.0) (2.9) (22.2) (23.0) (82.8)

8.5-9.0 3,798.0 601.0 0.0 42.9 945.1 0.0 0.0 3,210.9 3,674.6 12,272.5

(19.0) (3.0) (0.0) (0.2) (4.7) (0.0) (0.0) (16.1) (18.4) (61.4)

Virginia 7.0-7.5 889.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 889.2

(4.4) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (0.0) (4.4)

7.5-8.0 3,605.5 15.3 0.0 37.0 0.0 0.0 0.0 0.0 0.0 3,657.8

(18.0) (0.1) (0.0) (0.2) (0.0) (0.0) (0.0) (0.0) (0.0) (18.3)

8.0-8.5 1,135.8 2.0 0.0 2,985.9 0.0 0.0 2,355.9 69.1 0.0 6,548.7

(5.7) (0.0) (0.0) (14.9) (0.0) (0.0) (11.8) (0.3) (0.0) (32.7)

8.5-9.0 0.0 0.0 0.0 23.7 0.0 0.0 2,030.5 4,839.8 900.0 7,794.0

(0.0) (0.0) (0.0) (0.1) (0.0) (0.0) (10.2) (24.2) (4.5) (39.0)

1 Federal waters begin at 3 nm with the exception of Texas, which begins at 9 nm. The area reported for Texas represents 0-9 nm; 9-12 nm; and 12-50 nm 

respectively.
22

Table 2 (continued). Offshore wind resource area by state with potential by wind speed interval, water depth, distance from shore 

Distance from Shoreline

0 - 3 nm1 3 - 12 nm 12 - 50 nm

Wind Depth Category (m) Depth Category (m) Depth Category (m)

Speed 0 - 30 30 - 60 > 60 0 - 30 30 - 60 > 60 0 - 30 30 - 60 > 60 Total

at 90m km2 km2 km2 km2 km2 km2 km2 km2 km2 km2

State m/s (GW) (GW) (GW) (GW) (GW) (GW) (GW) (GW) (GW) (GW)

Washington 7.0-7.5 622.9 133.5 57.3 231.9 350.2 176.7 0.0 0.0 0.2 1,572.7

(3.1) (0.7) (0.3) (1.2) (1.8) (0.9) (0.0) (0.0) (0.0) (7.9)

7.5-8.0 370.6 0.0 0.0 203.0 841.6 1,173.0 0.0 0.0 2,033.1 4,621.4

(1.9) (0.0) (0.0) (1.0) (4.2) (5.9) (0.0) (0.0) (10.2) (23.1)

8.0-8.5 61.7 0.0 0.0 211.7 977.9 475.1 0.0 19.6 16,514.8 18,260.7

(0.3) (0.0) (0.0) (1.1) (4.9) (2.4) (0.0) (0.1) (82.6) (91.3)

Wisconsin 7.0-7.5 1,053.8 268.2 145.8 349.9 616.6 1,085.0 0.0 34.2 162.0 3,715.4

(5.3) (1.3) (0.7) (1.7) (3.1) (5.4) (0.0) (0.2) (0.8) (18.6)

7.5-8.0 1,417.2 235.5 23.7 361.7 223.0 779.3 0.0 0.0 364.2 3,404.5

(7.1) (1.2) (0.1) (1.8) (1.1) (3.9) (0.0) (0.0) (1.8) (17.0)

8.0-8.5 830.6 372.7 0.0 451.4 1,386.1 2,539.0 0.0 21.3 2,160.1 7,761.1

(4.2) (1.9) (0.0) (2.3) (6.9) (12.7) (0.0) (0.1) (10.8) (38.8)

8.5-9.0 25.5 8.1 0.0 11.7 300.8 1,347.3 0.0 62.8 6,661.0 8,417.3

(0.1) (0.0) (0.0) (0.1) (1.5) (6.7) (0.0) (0.3) (33.3) (42.1)
23

Future Plans

The data base is designed to be an evolving product with its elements subject to modification and 

change. The offshore wind resource is anticipated to undergo notable change as new updated 

resource maps are completed. The mid-Atlantic states, from Rhode Island to South Carolina,

will be the next group of states to be mapped and validated. The database will be modified to 

include the new information from this region upon completion of the maps. The database will 

continue to be periodically updated as additional offshore mapping projects are finished along 

the Atlantic coast of Florida, the Gulf coast, the Pacific coast, and Alaska. The database will 

eventually contain the wind resource for all 50 states. 

Incorporation of environmental exclusions and ocean-use factors impacting offshore wind 

development will be included in future editions of the database. These exclusions could include 

many factors including shipping lanes, marine habitat areas, submerged obstacles, military areas, 

and ocean-bottom topography. In addition, the database may be expanded to include other 

important characteristics such as wave power density, extreme wind and wave, ocean currents,

and a number of other parameters important to the design of offshore wind turbines. Wave 

power resource estimates are the first type of water power data likely to be included in future 

versions of the database.

Acknowledgements

Thanks to George Scott and Dennis Elliott of the NREL wind resource assessment group for 

their work in processing and analyzing the offshore wind measurement data. We also thank the 

staff of AWS Truepower for producing the model data used to create the updated offshore wind 

resource maps. This paper was written at NREL in support of DOE under contract number DEAC36-08-GO28308.

References

Applied Technology and Management Incorporated. (2007). RIWINDS Final Report Phase 1-

Wind Energy Siting Study. 124pp.

Dhanju, A.; P. Whitaker, W Kempton. (2008). Assessing Offshore Wind Resources: An 

Accessible Methodology. Renewable Energy vol. 33(1) p. 55-64.

Elliott, D.; Holliday, C.; Barchet, W.; Foote, H.; Sandusky, W. (1987). Wind Energy Resource 

Atlas of the United States. DOE/CH 10093-4, Golden, Colorado: Solar Energy Research 

Institute. 

Elliott, D.; Schwartz, M. (2006). Wind Resource Mapping for United States Offshore Areas: 

NREL/CP-500-40045. Golden, Colorado: NREL, 12 pp

Federal Register / Vol. 71, No. 1 / Tuesday, January 3, 2006 / Notices, page 127-131
24

Musial, W; Butterfield, C. (2004). Future for Offshore Wind Energy in the United States.

NREL/CP-500-36313 in EnergyOcean Proceedings. Palm Beach, Florida

Musial, W. D. (2007). Offshore Wind: Viable Option for Coastal Regions of the United States.

Marine Technology Society Journal, Published Fall 2007. 

Thormahlen, L. (1999). Boundary Development of the Outer Continental Shelf. OCS Report 

MMS 99-006.: Department of the Interior Minerals Management Service. Lakewood, Colorado

U.S. Department of Energy, Energy Efficiency and Renewable Energy. (2008). 20% Wind 

Energy by 2030, Increasing Wind Energy’s Contribution to U.S. Electricity Supply. Executive 

Summary. DOE/GO 102008-2578. Washington, D.C. 23 pp

U.S. Department of the Interior Minerals Management Service. (2007). Programmatic 

Environmental Impact Statement for Alternative Energy Development and Production and 

Alternate Use of Facilities on the Outer Continental Shelf – Draft Environmental Impact 

Statement. 

U.S. Department of the Interior Minerals Management Service Web portal 

http://www.mms.gov/ld/Maps.htm.

U.S. Supreme Court, STATE OF NEW JERSEY, Plaintiff, v. STATE OF DELAWARE, 

Defendant. No. 134 Original, October Term 2007.
25

Appendix A. Data Sources

A1. State-to-State Boundary Data

Table A1. State-to-State Boundary Data

State Source

California 1 NREL digitized line from the MMS SLA line to the California/Oregon 

state line

Connecticut http://www.ct.gov/dep/site/default.asp -

http://www.nyswaterfronts.com/index.asp

Georgia http://gis.state.ga.us/

Illinois

http://www.isgs.uiuc.edu/nsdihome/ -

http://www.mcgi.state.mi.us/mgdl/

Louisiana 1 http://atlas.lsu.edu/ - http://www.glo.state.tx.us/ - NREL digitized line 

from the MMS SLA line to the Texas/Louisiana state line

Maine http://megis.maine.gov/

Maryland http://www.marylandgis.net/SHAdata/

Massachusetts http://www.whoi.edu/

Michigan http://www.mcgi.state.mi.us/mgdl/

Minnesota http://deli.dnr.state.mn.us/data_catalog.html

Mississippi 1 http://www.maris.state.ms.us/ - http://atlas.lsu.edu/ - NREL digitized 

line from the MMS SLA line to the Mississippi/Alabama state line

New Jersey

http://www.state.nj.us/dep/njgs/ -

http://www.nyswaterfronts.com/index.asp

New York http://www.nyswaterfronts.com/index.asp

North Carolina

http://www.cgia.state.nc.us/ -

http://www.ors.state.sc.us/digital/gisdata.asp
26

Ohio http://www.dnr.state.oh.us/gims/ - http://www.mcgi.state.mi.us/mgdl/

Oregon 1 NREL digitized line from the MMS SLA line to the Oregon/California 

and Oregon/Washington state lines

Pennsylvania http://nationalatlas.gov/atlasftp.html -

http://www.dnr.state.oh.us/gims/ -

http://www.nyswaterfronts.com/index.asp

South Carolina http://www.ors.state.sc.us/digital/gisdata.asp - http://gis.state.ga.us/

Texas 1 http://www.glo.state.tx.us - NREL digitized line from the MMS SLA 

line to the Texas/Louisiana state line

Washington http://www.ecy.wa.gov/services/gis/data/data.htm

1 Environmental Systems Research Institute, Inc. Data & Maps 9.1 Detailed States
27

A2. Wind Map Data

Table A2. Wind Map Datasets

State Method Preliminary 

Date

Final 

Date

California Old Offshore Map 2002 2002

Connecticut Old Offshore Map 2002

Delaware Old Offshore Map 2002 2003

Georgia Updated Offshore Map 2006

Hawaii Old Offshore Map 2004

Illinois Updated Offshore Map 2008

Indiana Updated Offshore Map 2008

Louisiana Updated Offshore Map 2007

Maine Updated Offshore Map 2008

Maryland Old Offshore Map 2002 2003

Massachusetts Updated Offshore Map 2008

Michigan Updated Offshore Map 2008

Minnesota Updated Offshore Map 2008

New Hampshire Updated Offshore Map 2008

New Jersey Old Offshore Map 2002 2003

New York (Atlantic) Old Offshore Map 2003

New York (Great Lakes) Updated Offshore Map 2008

North Carolina Old Offshore Map 2002 2003

Ohio Updated Offshore Map 2008

Oregon Old Offshore Map 2001 2002

Pennsylvania Updated Offshore Map 2008

Rhode Island Old Offshore Map 2002

South Carolina Old Offshore Map 2006

Texas Updated Offshore Map 2007

Virginia Old Offshore Map 2002 2003

Washington Old Offshore Map 2001 2002

Wisconsin Updated Offshore Map 2008
28

Appendix B. Detailed maps and tables

B1. United States

B2. California

B3. Connecticut

B4. Delaware

B5. Georgia

B6. Hawaii

B7. Illinois

B8. Indiana

B9. Louisiana

B10. Maine

B11. Maryland

B12. Massachusetts

B13. Michigan

B14. Minnesota

B15. New Hampshire

B16. New Jersey

B17. New York

B18. North Carolina

B19. Ohio

B20. Oregon

B21. Pennsylvania

B22. Rhode Island

B23. South Carolina

B24. Texas

B25. Virginia

B26. Washington

B27. Wisconsin

NOTE: AWS Truepower produced the offshore wind resource estimates under the 

name AWS Truewind.
29

Appendix B. U.S. Detailed Wind Database Information by Element

Table B1. U.S. offshore wind resource by state and wind speed interval. Resource areas limited to >7.0 m/s at 90-m height 

and within 50 nm of shore.

Wind Speed at 90 m (m/s)

7.0 - 7.5 7.5 - 8.0 8.0 - 8.5 8.5 - 9.0 9.0 - 9.5 9.5 - 10.0 >10.0

Total 

>7.0

State

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

California 11,439 24,864 23,059 22,852 13,185 15,231 6,926 117,555

(57,195) (124,318) (115,296) (114,258) (65,924) (76,153) (34,629) (587,773)

Connecticut 530 702 40 0 0 0 0 1,272

(2,652) (3,508) (201) (0) (0) (0) (0) (6,360)

Delaware 223 724 1,062 931 0 0 0 2,940

(1,116) (3,618) (5,310) (4,657) (0) (0) (0) (14,701)

Georgia 3,820 7,741 523 0 0 0 0 12,085

(19,102) (38,706) (2,617) (0) (0) (0) (0) (60,425)

Hawaii 18,873 42,298 33,042 13,913 7,779 6,720 4,852 127,477

(94,363) (211,492) (165,210) (69,567) (38,894) (33,598) (24,260) (637,383)

Illinois 92 166 3,844 90 0 0 0 4,192

(458) (830) (19,222) (450) (0) (0) (0) (20,960)

Indiana 82 216 286 0 0 0 0 584

(410) (1,082) (1,428) (0) (0) (0) (0) (2,919)

Louisiana 48,043 15,032 0 0 0 0 0 63,075

(240,214) (75,162) (0) (0) (0) (0) (0) (315,376)

Maine 906 1,142 1,976 3,331 8,429 15,485 42 31,311

(4,531) (5,711) (9,878) (16,655) (42,146) (77,424) (208) (156,553)

Maryland 2,192 1,946 1,540 5,078 0 0 0 10,756

(10,960) (9,732) (7,700) (25,390) (0) (0) (0) (53,782)

Massachusetts 202 526 1,639 3,606 20,351 13,674 0 39,997

(1,008) (2,631) (8,195) (18,030) (101,753) (68,370) (0) (199,987)

Michigan 4,459 18,074 31,086 34,305 8,719 0 0 96,642

(22,297) (90,368) (155,430) (171,524) (43,593) (0) (0) (483,212)
30

Table B1 (continued). U.S. offshore wind resource by state and wind speed interval. Resource areas limited to >7.0 m/s at 

90-m height and within 50 nm of shore.

Wind Speed at 90 m (m/s)

7.0 - 7.5 7.5 - 8.0 8.0 - 8.5 8.5 - 9.0 9.0 - 9.5 9.5 - 10.0 >10.0

Total 

>7.0

State

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Minnesota 3,102 994 0 0 0 0 0 4,096

(15,510) (4,972) (0) (0) (0) (0) (0) (20,481)

New Hampshire 19 46 171 336 102 0 0 672

(93) (229) (853) (1,678) (508) (0) (0) (3,361)

New Jersey 528 1,508 4,965 12,934 0 0 0 19,935

(2,642) (7,538) (24,827) (64,668) (0) (0) (0) (99,675)

New York 1,105 4,358 8,324 2,876 7,453 5,322 0 29,439

(5,524) (21,789) (41,621) (14,382) (37,267) (26,612) (0) (147,194)

North Carolina 1,847 4,098 13,655 39,875 16 0 0 59,491

(9,237) (20,491) (68,274) (199,374) (80) (0) (0) (297,456)

Ohio 341 3,067 5,829 0 0 0 0 9,237

(1,705) (15,333) (29,147) (0) (0) (0) (0) (46,186)

Oregon 388 1,493 8,644 13,925 7,394 6,065 5,986 43,894

(1,938) (7,465) (43,222) (69,623) (36,969) (30,327) (29,928) (219,471)

Pennsylvania 34 211 1,679 0 0 0 0 1,924

(171) (1,054) (8,395) (0) (0) (0) (0) (9,620)

Rhode Island 224 126 283 671 1,461 2,360 0 5,126

(1,121) (630) (1,417) (3,356) (7,307) (11,799) (0) (25,631)

South Carolina 1,457 8,202 10,384 6,007 0 0 0 26,049

(7,283) (41,010) (51,919) (30,033) (0) (0) (0) (130,244)

Texas1 2,019 24,823 16,556 12,273 0 0 0 55,671

(10,095) (124,114) (82,782) (61,363) (0) (0) (0) (278,353)

Virginia 889 3,658 6,549 7,794 0 0 0 18,890

(4,446) (18,289) (32,743) (38,970) (0) (0) (0) (94,448)
31

Table B1 (continued). U.S. offshore wind resource by state and wind speed interval. Resource areas limited to >7.0 m/s 

at 90-m height and within 50 nm of shore.

Wind Speed at 90 m (m/s)

7.0 - 7.5 7.5 - 8.0 8.0 - 8.5 8.5 - 9.0 9.0 - 9.5 9.5 - 10.0 >10.0 Total >7.0

State

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Washington 1,573 4,621 18,261 0 0 0 0 24,455

(7,863) (23,107) (91,304) (0) (0) (0) (0) (122,274)

Wisconsin 3,715 3,405 7,761 8,417 0 0 0 23,298

(18,577) (17,023) (38,806) (42,087) (0) (0) (0) (116,492)

Total 108,102 174,040 201,159 189,213 74,888 64,856 17,805 830,064

(540,510) (870,202) (1,005,795) (946,063) (374,441) (324,282) (89,024) (4,150,319)
32

Table B1.1. U.S. offshore wind resource by state and water depth category. Resource areas 

limited to >7.0 m/s at 90-m height and within 50 nm of shore. 

Shallow 

(0 - 30m)

Transitional 

(30 - 60m)

Deep 

(> 60m) Total

State

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

California 871 2,091 114,593 117,555

(4,354) (10,453) (572,966) (587,773)

Connecticut 1,152 118 2 1,272

(5,760) (592) (8) (6,360)

Delaware 2,233 707 0 2,940

(11,164) (3,537) (0) (14,701)

Georgia 9,643 2,442 0 12,085

(48,217) (12,208) (0) (60,425)

Hawaii 460 1,106 125,910 127,477

(2,302) (5,529) (629,552) (637,383)

Illinois 1,351 1,017 1,824 4,192

(6,757) (5,086) (9,118) (20,960)

Indiana 584 0 0 584

(2,919) (0) (0) (2,919)

Louisiana 36,698 8,380 17,997 63,075

(183,492) (41,899) (89,985) (315,376)

Maine 3,145 3,048 25,117 31,311

(15,727) (15,239) (125,587) (156,553)

Maryland 6,162 3,258 1,336 10,756

(30,809) (16,292) (6,681) (53,782)

Massachusetts 9,570 11,612 18,816 39,997

(47,849) (58,059) (94,079) (199,987)

Michigan 17,177 15,023 64,442 96,642

(85,887) (75,115) (322,210) (483,212)

Minnesota 5 75 4,016 4,096

(25) (376) (20,080) (20,481)

New Hampshire 116 171 386 672

(579) (854) (1,928) (3,361)

New Jersey 8,696 10,910 329 19,935

(43,480) (54,549) (1,647) (99,675)

New York 7,496 11,253 10,690 29,439

(37,481) (56,263) (53,450) (147,194)

North Carolina 28,006 15,544 15,942 59,491

(140,029) (77,719) (79,708) (297,456)

Ohio 9,237 0 0 9,237

(46,186) (0) (0) (46,186)

Oregon 1,319 1,946 40,630 43,894

(6,595) (9,728) (203,148) (219,471)
33

Table B1.1 (continued). U.S. offshore wind resource by state and water depth category. Resource 

areas limited to >7.0 m/s at 90-m height and within 50 nm of shore.

Shallow 

(0 - 30m)

Transitional 

(30 - 60m)

Deep 

(> 60m) Total

State

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Pennsylvania 1,451 473 0 1,924

(7,253) (2,367) (0) (9,620)

Rhode Island 1,048 2,691 1,388 5,126

(5,238) (13,453) (6,940) (25,631)

South Carolina 17,182 7,322 1,544 26,049

(85,911) (36,611) (7,722) (130,244)

Texas1 31,370 15,637 8,663 55,671

(156,852) (78,184) (43,317) (278,353)

Virginia 13,063 4,926 900 18,890

(65,317) (24,631) (4,500) (94,448)

Washington 1,702 2,323 20,430 24,455

(8,509) (11,614) (102,151) (122,274)

Wisconsin 4,502 3,529 15,267 23,298

(22,508) (17,647) (76,337) (116,492)

Total 214,240 125,601 490,223 830,064

(1,071,202) (628,004) (2,451,113) (4,150,319)
34

Table B1.2. U.S. offshore wind resource by state and distance from shore. Resource areas 

limited to >7.0 m/s at 90-m height and within 50 nm of shore. 

0 - 3 nm 3 - 12 nm

12 - 50 

nm Total

State

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

California 2,447 20,824 94,283 117,555

(12,237) (104,121) (471,416) (587,773)

Connecticut 1,272 0 0 1,272

(6,360) (0) (0) (6,360)

Delaware 1,088 672 1,181 2,940

(5,438) (3,359) (5,904) (14,701)

Georgia 633 2,692 8,760 12,085

(3,164) (13,459) (43,802) (60,425)

Hawaii 13,455 19,794 94,228 127,477

(67,275) (98,971) (471,138) (637,383)

Illinois 501 1,573 2,117 4,192

(2,507) (7,867) (10,586) (20,960)

Indiana 337 247 0 584

(1,687) (1,233) (0) (2,919)

Louisiana 7,944 11,554 43,578 63,075

(39,718) (57,768) (217,891) (315,376)

Maine 5,483 7,919 17,909 31,311

(27,416) (39,594) (89,543) (156,553)

Maryland 4,292 934 5,531 10,756

(21,459) (4,670) (27,653) (53,782)

Massachusetts 5,392 7,087 27,519 39,997

(26,958) (35,436) (137,593) (199,987)

Michigan 15,814 36,855 43,973 96,642

(79,068) (184,277) (219,867) (483,212)

Minnesota 334 1,810 1,952 4,096

(1,670) (9,052) (9,759) (20,481)

New Hampshire 154 364 154 672

(769) (1,822) (770) (3,361)

New Jersey 2,271 3,665 13,999 19,935

(11,353) (18,327) (69,995) (99,675)

New York 6,232 8,920 14,287 29,439

(31,159) (44,602) (71,434) (147,194)

North Carolina 8,875 8,985 41,632 59,491

(44,373) (44,923) (208,160) (297,456)

Ohio 2,013 4,153 3,071 9,237

(10,065) (20,765) (15,356) (46,186)

Oregon 2,255 8,575 33,064 43,894

(11,274) (42,876) (165,320) (219,471)
35

Table B1.2 (continued). U.S. offshore wind resource by state and distance from shore. Resource 

areas limited to >7.0 m/s at 90-m height and within 50 nm of shore. 

0 - 3 nm 3 - 12 nm 12 - 50 nm Total

State

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Pennsylvania 425 1,206 293 1,924

(2,123) (6,032) (1,465) (9,620)

Rhode Island 815 1,526 2,785 5,126

(4,074) (7,630) (13,927) (25,631)

South Carolina 1,465 5,272 19,313 26,049

(7,323) (26,358) (96,563) (130,244)

Texas1 21,285 3,128 31,257 55,671

(106,423) (15,642) (156,287) (278,353)

Virginia 5,648 3,047 10,195 18,890

(28,239) (15,233) (50,976) (94,448)

Washington 1,246 4,641 18,568 24,455

(6,230) (23,205) (92,839) (122,274)

Wisconsin 4,381 9,452 9,466 23,298

(21,905) (47,258) (47,328) (116,492)

Total 116,053 174,896 539,114 830,064

(580,267) (874,481) (2,695,572) (4,150,319)

1 Federal waters begin at 3 nm with the exception of Texas, which begins at 9 nm. For Texas, the area reported is 

for 0 - 9 nm; 9 - 12 nm; and 12 - 50 nm respectively.
36

Table B1.3. Offshore wind resource by state, wind speed interval, water depth and distance from shore within 50 nm of shore. 

Distance from Shoreline

0 - 3 nm1 3 - 12 nm 12 - 50 nm

Wind Depth Category (m) Depth Category (m) Depth Category (m)

Speed 0 - 30 30 - 60 > 60 0 - 30 30 - 60 > 60 0 - 30 30 - 60 > 60 Total

at 90m Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2)

State m/s (MW) (MW) (MW) (MW) (MW) (MW) (MW) (MW) (MW) (MW)

California 7.0-7.5 266.2 236.2 257.4 100.9 456.8 4,554.0 7.7 22.9 5,536.8 11,438.9

(1,331) (1,181) (1,287) (504) (2,284) (22,770) (38) (115) (27,684) (57,195)

7.5-8.0 239.1 256.9 189.6 78.8 595.7 3,854.6 0.0 32.9 19,616.1 24,863.7

(1,196) (1,285) (948) (394) (2,978) (19,273) (0) (165) (98,080) (124,318)

8.0-8.5 125.2 178.2 281.8 7.1 105.8 4,539.1 0.0 0.0 17,822.2 23,059.3

(626) (891) (1,409) (36) (529) (22,695) (0) (0) (89,111) (115,296)

8.5-9.0 43.2 141.7 176.4 0.6 38.0 4,559.8 0.0 0.0 17,892.0 22,851.6

(216) (708) (882) (3) (190) (22,799) (0) (0) (89,460) (114,258)

9.0-9.5 2.1 18.8 14.9 0.0 0.9 988.0 0.0 0.0 12,160.2 13,184.8

(10) (94) (74) (0) (4) (4,940) (0) (0) (60,801) (65,924)

9.5-10.0 0.0 6.0 13.9 0.0 0.0 656.1 0.0 0.0 14,554.8 15,230.7

(0) (30) (69) (0) (0) (3,280) (0) (0) (72,774) (76,153)

>10.0 0.0 0.0 0.1 0.0 0.0 288.1 0.0 0.0 6,637.6 6,925.8

(0) (0) (1) (0) (0) (1,441) (0) (0) (33,188) (34,629)

Connecticut 7.0-7.5 500.1 30.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 530.4

(2,501) (151) (0) (0) (0) (0) (0) (0) (0) (2,652)

7.5-8.0 617.3 83.0 1.2 0.0 0.0 0.0 0.0 0.0 0.0 701.6

(3,087) (415) (6) (0) (0) (0) (0) (0) (0) (3,508)

8.0-8.5 34.6 5.0 0.4 0.0 0.0 0.0 0.0 0.0 0.0 40.1

(173) (25) (2) (0) (0) (0) (0) (0) (0) (201)

Delaware 7.0-7.5 223.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 223.2

(1,116) (0) (0) (0) (0) (0) (0) (0) (0) (1,116)

7.5-8.0 716.5 2.0 0.0 5.2 0.0 0.0 0.0 0.0 0.0 723.7

(3,583) (10) (0) (26) (0) (0) (0) (0) (0) (3,618)

8.0-8.5 135.4 10.5 0.0 658.0 8.6 0.0 240.4 8.9 0.0 1,061.9

(677) (53) (0) (3,290) (43) (0) (1,202) (44) (0) (5,310)

8.5-9.0 0.0 0.0 0.0 0.0 0.0 0.0 254.0 677.4 0.0 931.4

(0) (0) (0) (0) (0) (0) (1,270) (3,387) (0) (4,657)
37

Table B.1.3 (continued) Offshore wind resource by state, wind speed interval, water depth and distance from shore within 50 nm of 

shore.

Distance from Shoreline

0 - 3 nm1 3 - 12 nm 12 - 50 nm

Wind Depth Category (m) Depth Category (m) Depth Category (m)

Speed 0 - 30 30 - 60 > 60 0 - 30 30 - 60 > 60 0 - 30 30 - 60 > 60 Total

at 90m Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2)

State m/s (MW) (MW) (MW) (MW) (MW) (MW) (MW) (MW) (MW) (MW)

Georgia 7.0-7.5 547.5 0.0 0.0 2,162.3 0.0 0.0 1,110.6 0.0 0.0 3,820.4

(2,737) (0) (0) (10,811) (0) (0) (5,553) (0) (0) (19,102)

7.5-8.0 85.2 0.0 0.0 529.6 0.0 0.0 5,204.3 1,922.1 0.0 7,741.2

(426) (0) (0) (2,648) (0) (0) (26,021) (9,610) (0) (38,706)

8.0-8.5 0.0 0.0 0.0 0.0 0.0 0.0 3.9 519.5 0.0 523.4

(0) (0) (0) (0) (0) (0) (19) (2,598) (0) (2,617)

Hawaii 7.0-7.5 111.5 97.2 2,631.5 0.0 42.6 2,213.3 44.4 116.8 13,615.3 18,872.6

(557) (486) (13,157) (0) (213) (11,067) (222) (584) (68,077) (94,363)

7.5-8.0 65.5 107.0 2,404.0 0.0 145.0 5,051.6 6.9 250.7 34,267.6 42,298.3

(328) (535) (12,020) (0) (725) (25,258) (34) (1,254) (171,338) (211,492)

8.0-8.5 92.2 114.8 2,364.3 0.0 15.0 4,755.7 0.2 0.3 25,699.5 33,042.0

(461) (574) (11,822) (0) (75) (23,778) (1) (1) (128,498) (165,210)

8.5-9.0 65.6 67.0 2,105.2 0.0 0.0 2,625.5 0.0 0.0 9,050.0 13,913.3

(328) (335) (10,526) (0) (0) (13,128) (0) (0) (45,250) (69,567)

9.0-9.5 25.7 39.0 995.6 0.0 0.0 1,853.0 0.0 0.0 4,865.5 7,778.8

(129) (195) (4,978) (0) (0) (9,265) (0) (0) (24,328) (38,894)

9.5-10.0 22.0 39.8 666.0 0.0 0.0 1,064.9 0.0 0.0 4,926.8 6,719.6

(110) (199) (3,330) (0) (0) (5,324) (0) (0) (24,634) (33,598)

>10.0 26.3 70.5 1,344.0 0.0 0.0 2,027.6 0.0 0.0 1,383.5 4,852.0

(132) (353) (6,720) (0) (0) (10,138) (0) (0) (6,918) (24,260)

Illinois 7.0-7.5 91.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 91.6

(458) (0) (0) (0) (0) (0) (0) (0) (0) (458)

7.5-8.0 164.6 0.0 0.0 0.0 0.1 0.0 0.0 1.3 0.0 166.0

(823) (0) (0) (0) (1) (0) (0) (6) (0) (830)

8.0-8.5 244.2 1.0 0.0 830.4 512.2 140.7 7.1 426.1 1,682.8 3,844.5

(1,221) (5) (0) (4,152) (2,561) (704) (35) (2,130) (8,414) (19,222)

8.5-9.0 0.0 0.0 0.0 13.4 76.6 0.0 0.0 0.0 0.0 89.9

(0) (0) (0) (67) (383) (0) (0) (0) (0) (450)
38

Table B.1.3 (continued) Offshore wind resource by state, wind speed interval, water depth and distance from shore within 50 nm of 

shore.

Distance from Shoreline

0 - 3 nm1 3 - 12 nm 12 - 50 nm

Wind Depth Category (m) Depth Category (m) Depth Category (m)

Speed 0 - 30 30 - 60 > 60 0 - 30 30 - 60 > 60 0 - 30 30 - 60 > 60 Total

at 90m Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2)

State m/s (MW) (MW) (MW) (MW) (MW) (MW) (MW) (MW) (MW) (MW)

Indiana 7.0-7.5 82.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 82.1

(410) (0) (0) (0) (0) (0) (0) (0) (0) (410)

7.5-8.0 153.8 0.0 0.0 62.6 0.0 0.0 0.0 0.0 0.0 216.3

(769) (0) (0) (313) (0) (0) (0) (0) (0) (1,082)

8.0-8.5 101.5 0.0 0.0 184.0 0.0 0.0 0.0 0.0 0.0 285.5

(507) (0) (0) (920) (0) (0) (0) (0) (0) (1,428)

Louisiana 7.0-7.5 7,759.6 28.6 0.0 7,825.2 643.4 1,460.4 11,163.9 5,479.1 13,682.4 48,042.7

(38,798) (143) (0) (39,126) (3,217) (7,302) (55,819) (27,396) (68,412) (240,214)

7.5-8.0 155.3 0.0 0.0 1,624.5 0.0 0.0 8,169.9 2,228.7 2,854.1 15,032.5

(776) (0) (0) (8,123) (0) (0) (40,850) (11,143) (14,271) (75,162)

Maine 7.0-7.5 787.0 91.2 11.9 7.8 4.8 3.5 0.0 0.0 0.0 906.2

(3,935) (456) (59) (39) (24) (18) (0) (0) (0) (4,531)

7.5-8.0 797.2 285.4 19.4 6.7 19.6 14.1 0.0 0.0 0.0 1,142.3

(3,986) (1,427) (97) (33) (98) (70) (0) (0) (0) (5,711)

8.0-8.5 777.0 440.8 74.2 63.4 385.6 234.5 0.0 0.0 0.0 1,975.6

(3,885) (2,204) (371) (317) (1,928) (1,173) (0) (0) (0) (9,878)

8.5-9.0 513.4 614.0 157.6 18.2 219.1 1,401.9 0.0 0.0 406.8 3,331.1

(2,567) (3,070) (788) (91) (1,095) (7,010) (0) (0) (2,034) (16,655)

9.0-9.5 142.2 390.0 309.2 25.9 469.0 3,504.1 0.0 57.8 3,530.9 8,429.2

(711) (1,950) (1,546) (129) (2,345) (17,520) (0) (289) (17,655) (42,146)

9.5-10.0 5.5 24.9 42.3 1.0 38.3 1,459.8 0.0 7.4 13,905.6 15,484.7

(28) (124) (211) (5) (191) (7,299) (0) (37) (69,528) (77,424)

>10.0 0.0 0.0 0.0 0.0 0.0 41.6 0.0 0.0 0.0 41.6

(0) (0) (0) (0) (0) (208) (0) (0) (0) (208)

Maryland 7.0-7.5 2,175.4 16.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2,192.0

(10,877) (83) (0) (0) (0) (0) (0) (0) (0) (10,960)

7.5-8.0 1,922.5 14.0 0.0 9.9 0.0 0.0 0.0 0.0 0.0 1,946.4

(9,613) (70) (0) (49) (0) (0) (0) (0) (0) (9,732)
39

Table B.1.3 (continued) Offshore wind resource by state, wind speed interval, water depth and distance from shore within 50 nm of 

shore.

Distance from Shoreline

0 - 3 nm1 3 - 12 nm 12 - 50 nm

Wind Depth Category (m) Depth Category (m) Depth Category (m)

Speed 0 - 30 30 - 60 > 60 0 - 30 30 - 60 > 60 0 - 30 30 - 60 > 60 Total

at 90m Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2)

State m/s (MW) (MW) (MW) (MW) (MW) (MW) (MW) (MW) (MW) (MW)

Maryland 8.0-8.5 163.3 0.0 0.0 924.0 0.0 0.0 435.4 17.2 0.0 1,539.9

(cont.) (817) (0) (0) (4,620) (0) (0) (2,177) (86) (0) (7,700)

8.5-9.0 0.0 0.0 0.0 0.0 0.0 0.0 531.3 3,210.7 1,336.1 5,078.1

(0) (0) (0) (0) (0) (0) (2,656) (16,053) (6,681) (25,390)

Massachusetts 7.0-7.5 201.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 201.6

(1,008) (0) (0) (0) (0) (0) (0) (0) (0) (1,008)

7.5-8.0 521.4 4.7 0.0 0.0 0.0 0.0 0.0 0.0 0.0 526.1

(2,607) (23) (0) (0) (0) (0) (0) (0) (0) (2,631)

8.0-8.5 927.4 327.3 28.6 78.2 152.0 125.5 0.0 0.0 0.0 1,639.1

(4,637) (1,636) (143) (391) (760) (628) (0) (0) (0) (8,195)

8.5-9.0 1,508.2 378.1 12.6 315.0 354.5 812.2 11.4 23.5 190.4 3,606.0

(7,541) (1,890) (63) (1,575) (1,773) (4,061) (57) (118) (952) (18,030)

9.0-9.5 1,137.0 322.6 20.0 2,696.9 1,418.6 1,006.5 1,689.9 5,051.8 7,007.4 20,350.7

(5,685) (1,613) (100) (13,484) (7,093) (5,033) (8,449) (25,259) (35,037) (101,753)

9.5-10.0 2.0 0.0 0.0 8.6 119.2 0.0 472.1 3,459.5 9,612.5 13,674.0

(10) (0) (0) (43) (596) (0) (2,361) (17,298) (48,063) (68,370)

Michigan 7.0-7.5 3,411.4 330.6 243.7 142.6 49.8 268.0 1.2 0.0 12.1 4,459.3

(17,057) (1,653) (1,218) (713) (249) (1,340) (6) (0) (61) (22,297)

7.5-8.0 4,632.7 1,258.2 635.3 3,069.0 2,916.4 2,991.0 14.2 108.5 2,448.4 18,073.7

(23,163) (6,291) (3,177) (15,345) (14,582) (14,955) (71) (542) (12,242) (90,368)

8.0-8.5 2,588.1 1,253.3 769.0 2,770.6 5,889.7 9,411.9 30.9 876.1 7,496.4 31,085.9

(12,940) (6,267) (3,845) (13,853) (29,448) (47,059) (155) (4,381) (37,482) (155,430)

8.5-9.0 138.7 156.2 396.5 145.1 550.6 8,580.8 118.5 1,383.9 22,834.5 34,304.7

(693) (781) (1,983) (726) (2,753) (42,904) (592) (6,920) (114,172) (171,524)

9.0-9.5 0.0 0.0 0.0 0.0 0.0 69.9 114.6 249.6 8,284.5 8,718.7

(0) (0) (0) (0) (0) (350) (573) (1,248) (41,423) (43,593)

Minnesota 7.0-7.5 5.1 43.6 272.6 0.0 31.5 1,718.1 0.0 0.0 1,031.1 3,101.9

(25) (218) (1,363) (0) (158) (8,590) (0) (0) (5,155) (15,510)

7.5-8.0 0.0 0.1 12.7 0.0 0.0 60.8 0.0 0.0 920.7 994.3

(0) (0) (64) (0) (0) (304) (0) (0) (4,603) (4,972)
40

Table B.1.3 (continued) Offshore wind resource by state, wind speed interval, water depth and distance from shore within 50 nm of 

shore.

Distance from Shoreline

0 - 3 nm1 3 - 12 nm 12 - 50 nm

Wind Depth Category (m) Depth Category (m) Depth Category (m)

Speed 0 - 30 30 - 60 > 60 0 - 30 30 - 60 > 60 0 - 30 30 - 60 > 60 Total

at 90m Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2)

State m/s (MW) (MW) (MW) (MW) (MW) (MW) (MW) (MW) (MW) (MW)

New 

Hampshire 7.0-7.5 18.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 18.6

(93) (0) (0) (0) (0) (0) (0) (0) (0) (93)

7.5-8.0 45.8 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 45.8

(229) (0) (0) (0) (0) (0) (0) (0) (0) (229)

8.0-8.5 44.6 29.7 0.0 6.9 75.5 14.0 0.0 0.0 0.0 170.6

(223) (148) (0) (34) (378) (70) (0) (0) (0) (853)

8.5-9.0 0.0 8.0 7.2 0.0 12.4 255.7 0.0 10.1 42.2 335.7

(0) (40) (36) (0) (62) (1,279) (0) (51) (211) (1,678)

9.0-9.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 35.2 66.4 101.6

(0) (0) (0) (0) (0) (0) (0) (176) (332) (508)

New Jersey 7.0-7.5 520.2 0.0 0.0 8.2 0.0 0.0 0.0 0.0 0.0 528.5

(2,601) (0) (0) (41) (0) (0) (0) (0) (0) (2,642)

7.5-8.0 960.4 0.0 0.0 518.6 27.9 0.7 0.0 0.0 0.0 1,507.6

(4,802) (0) (0) (2,593) (140) (4) (0) (0) (0) (7,538)

8.0-8.5 776.9 0.0 0.0 2,764.8 127.1 3.2 899.4 372.4 21.6 4,965.4

(3,885) (0) (0) (13,824) (636) (16) (4,497) (1,862) (108) (24,827)

8.5-9.0 13.1 0.0 0.0 214.7 0.0 0.0 2,019.5 10,382.4 303.8 12,933.5

(66) (0) (0) (1,074) (0) (0) (10,098) (51,912) (1,519) (64,668)

New York 7.0-7.5 1,047.9 54.2 0.0 2.8 0.0 0.0 0.0 0.0 0.0 1,104.8

(5,239) (271) (0) (14) (0) (0) (0) (0) (0) (5,524)

7.5-8.0 1,983.1 354.7 11.6 472.7 609.0 866.8 0.0 0.0 59.9 4,357.8

(9,915) (1,774) (58) (2,363) (3,045) (4,334) (0) (0) (300) (21,789)

8.0-8.5 1,329.3 602.9 196.5 375.6 535.7 3,122.0 42.2 12.6 2,107.4 8,324.1

(6,646) (3,015) (982) (1,878) (2,679) (15,610) (211) (63) (10,537) (41,621)

8.5-9.0 535.1 110.6 0.6 1,042.6 93.8 0.0 261.5 727.8 104.5 2,876.4

(2,675) (553) (3) (5,213) (469) (0) (1,307) (3,639) (522) (14,382)

9.0-9.5 5.4 0.0 0.0 391.9 1,407.6 0.0 6.4 4,926.1 716.0 7,453.3

(27) (0) (0) (1,959) (7,038) (0) (32) (24,631) (3,580) (37,267)

9.5-10.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1,817.6 3,504.8 5,322.4

(0) (0) (0) (0) (0) (0) (0) (9,088) (17,524) (26,612)
41

Table B.1.3 (continued) Offshore wind resource by state, wind speed interval, water depth and distance from shore within 50 nm of 

shore.

Distance from Shoreline

0 - 3 nm1 3 - 12 nm 12 - 50 nm

Wind Depth Category (m) Depth Category (m) Depth Category (m)

Speed 0 - 30 30 - 60 > 60 0 - 30 30 - 60 > 60 0 - 30 30 - 60 > 60 Total

at 90m Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2)

State m/s (MW) (MW) (MW) (MW) (MW) (MW) (MW) (MW) (MW) (MW)

North Carolina 7.0-7.5 1,847.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1,847.4

(9,237) (0) (0) (0) (0) (0) (0) (0) (0) (9,237)

7.5-8.0 3,002.1 0.0 0.0 1,096.1 0.0 0.0 0.0 0.0 0.0 4,098.3

(15,010) (0) (0) (5,481) (0) (0) (0) (0) (0) (20,491)

8.0-8.5 3,920.0 0.1 0.1 4,653.8 0.0 0.0 4,034.9 746.5 299.2 13,654.7

(19,600) (1) (0) (23,269) (0) (0) (20,174) (3,733) (1,496) (68,274)

8.5-9.0 105.0 0.0 0.0 2,964.1 261.4 8.9 6,382.4 14,519.6 15,633.3 39,874.8

(525) (0) (0) (14,821) (1,307) (45) (31,912) (72,598) (78,167) (199,374)

9.0-9.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 16.0 0.0 16.0

(0) (0) (0) (0) (0) (0) (0) (80) (0) (80)

Ohio 7.0-7.5 341.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0 341.0

(1,705) (0) (0) (0) (0) (0) (0) (0) (0) (1,705)

7.5-8.0 1,106.8 0.0 0.0 1,959.8 0.0 0.0 0.0 0.0 0.0 3,066.7

(5,534) (0) (0) (9,799) (0) (0) (0) (0) (0) (15,333)

8.0-8.5 565.2 0.0 0.0 2,193.1 0.0 0.0 3,071.2 0.0 0.0 5,829.5

(2,826) (0) (0) (10,965) (0) (0) (15,356) (0) (0) (29,147)

Oregon 7.0-7.5 355.8 20.6 0.0 0.9 9.2 1.2 0.0 0.0 0.0 387.6

(1,779) (103) (0) (4) (46) (6) (0) (0) (0) (1,938)

7.5-8.0 523.0 319.2 37.6 46.5 231.8 335.0 0.0 0.0 0.0 1,493.0

(2,615) (1,596) (188) (232) (1,159) (1,675) (0) (0) (0) (7,465)

8.0-8.5 198.3 277.0 6.6 19.0 595.7 2,558.5 0.0 0.0 4,989.5 8,644.4

(991) (1,385) (33) (95) (2,978) (12,792) (0) (0) (24,947) (43,222)

8.5-9.0 64.1 98.8 0.6 0.0 108.0 1,967.2 0.0 45.6 11,640.3 13,924.6

(320) (494) (3) (0) (540) (9,836) (0) (228) (58,201) (69,623)

9.0-9.5 64.1 55.4 38.6 0.0 32.6 614.9 0.0 0.0 6,588.2 7,393.7

(321) (277) (193) (0) (163) (3,074) (0) (0) (32,941) (36,969)

9.5-10.0 47.3 80.4 14.6 0.0 33.8 634.6 0.0 0.0 5,254.6 6,065.3

(237) (402) (73) (0) (169) (3,173) (0) (0) (26,273) (30,327)

>10.0 0.2 19.4 33.3 0.0 18.2 1,368.5 0.0 0.0 4,546.0 5,985.5

(1) (97) (166) (0) (91) (6,843) (0) (0) (22,730) (29,928)
42

Table B.1.3 (continued) Offshore wind resource by state, wind speed interval, water depth and distance from shore within 50 nm of 

shore.

Distance from Shoreline

0 - 3 nm1 3 - 12 nm 12 - 50 nm

Wind Depth Category (m) Depth Category (m) Depth Category (m)

Speed 0 - 30 30 - 60 > 60 0 - 30 30 - 60 > 60 0 - 30 30 - 60 > 60 Total

at 90m Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2)

State m/s (MW) (MW) (MW) (MW) (MW) (MW) (MW) (MW) (MW) (MW)

Pennsylvania 7.0-7.5 34.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 34.2

(171) (0) (0) (0) (0) (0) (0) (0) (0) (171)

7.5-8.0 113.4 0.0 0.0 53.2 44.2 0.0 0.0 0.0 0.0 210.8

(567) (0) (0) (266) (221) (0) (0) (0) (0) (1,054)

8.0-8.5 276.2 0.9 0.0 750.8 358.1 0.0 222.9 70.2 0.0 1,679.1

(1,381) (4) (0) (3,754) (1,790) (0) (1,114) (351) (0) (8,395)

Rhode Island 7.0-7.5 216.3 8.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 224.3

(1,082) (40) (0) (0) (0) (0) (0) (0) (0) (1,121)

7.5-8.0 123.2 2.8 0.0 0.0 0.0 0.0 0.0 0.0 0.0 126.0

(616) (14) (0) (0) (0) (0) (0) (0) (0) (630)

8.0-8.5 139.9 39.8 0.0 34.5 69.2 0.0 0.0 0.0 0.0 283.5

(700) (199) (0) (173) (346) (0) (0) (0) (0) (1,417)

8.5-9.0 120.3 93.0 0.0 183.6 274.2 0.0 0.0 0.0 0.0 671.2

(602) (465) (0) (918) (1,371) (0) (0) (0) (0) (3,356)

9.0-9.5 53.7 17.6 0.0 176.0 782.7 0.0 0.0 430.2 1.3 1,461.5

(269) (88) (0) (880) (3,914) (0) (0) (2,151) (6) (7,307)

9.5-10.0 0.0 0.0 0.0 0.0 5.8 0.0 0.0 967.2 1,386.8 2,359.8

(0) (0) (0) (0) (29) (0) (0) (4,836) (6,934) (11,799)

South 

Carolina 7.0-7.5 848.2 0.0 0.0 608.4 0.0 0.0 0.0 0.0 0.0 1,456.5

(4,241) (0) (0) (3,042) (0) (0) (0) (0) (0) (7,283)

7.5-8.0 593.5 0.0 0.0 3,053.9 0.0 0.0 4,267.6 287.0 0.0 8,202.1

(2,968) (0) (0) (15,269) (0) (0) (21,338) (1,435) (0) (41,010)

8.0-8.5 22.9 0.0 0.0 1,609.4 0.0 0.0 4,151.4 3,925.6 674.5 10,383.7

(115) (0) (0) (8,047) (0) (0) (20,757) (19,628) (3,372) (51,919)

8.5-9.0 0.0 0.0 0.0 0.0 0.0 0.0 2,027.0 3,109.7 869.9 6,006.5

(0) (0) (0) (0) (0) (0) (10,135) (15,548) (4,349) (30,033)
43

Table B.1.3 (cont'd) Offshore wind resource by state, wind speed interval, water depth and distance from shore within 50 nm of shore.

Distance from Shoreline

0 - 3 nm1 3 - 12 nm 12 - 50 nm

Wind Depth Category (m) Depth Category (m) Depth Category (m)

Speed 0 - 30 30 - 60 > 60 0 - 30 30 - 60 > 60 0 - 30 30 - 60 > 60 Total

at 90m Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2) Area (km2)

State m/s (MW) (MW) (MW) (MW) (MW) (MW) (MW) (MW) (MW) (MW)

Texas1 7.0-7.5 1,785.5 0.0 0.1 96.2 0.0 0.0 137.2 0.0 0.0 2,019.1

(8,928) (0) (1) (481) (0) (0) (686) (0) (0) (10,095)

7.5-8.0 9,046.1 0.0 0.0 1,165.2 0.0 0.1 8,045.2 6,174.7 391.5 24,822.7

(45,230) (0) (0) (5,826) (0) (0) (40,226) (30,873) (1,958) (124,114)

8.0-8.5 5,928.5 125.4 0.0 742.1 136.9 0.0 583.5 4,442.8 4,597.1 16,556.3

(29,643) (627) (0) (3,711) (684) (0) (2,918) (22,214) (22,985) (82,782)

8.5-9.0 3,798.0 601.0 0.0 42.9 945.1 0.0 0.0 3,210.9 3,674.6 12,272.5

(18,990) (3,005) (0) (215) (4,726) (0) (0) (16,055) (18,373) (61,363)

Virginia 7.0-7.5 889.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 889.2

(4,446) (0) (0) (0) (0) (0) (0) (0) (0) (4,446)

7.5-8.0 3,605.5 15.3 0.0 37.0 0.0 0.0 0.0 0.0 0.0 3,657.8

(18,028) (77) (0) (185) (0) (0) (0) (0) (0) (18,289)

8.0-8.5 1,135.8 2.0 0.0 2,985.9 0.0 0.0 2,355.9 69.1 0.0 6,548.7

(5,679) (10) (0) (14,929) (0) (0) (11,780) (345) (0) (32,743)

8.5-9.0 0.0 0.0 0.0 23.7 0.0 0.0 2,030.5 4,839.8 900.0 7,794.0

(0) (0) (0) (119) (0) (0) (10,152) (24,199) (4,500) (38,970)

Washington 7.0-7.5 622.9 133.5 57.3 231.9 350.2 176.7 0.0 0.0 0.2 1,572.7

(3,115) (667) (286) (1,159) (1,751) (884) (0) (0) (1) (7,863)

7.5-8.0 370.6 0.0 0.0 203.0 841.6 1,173.0 0.0 0.0 2,033.1 4,621.4

(1,853) (0) (0) (1,015) (4,208) (5,865) (0) (0) (10,166) (23,107)

8.0-8.5 61.7 0.0 0.0 211.7 977.9 475.1 0.0 19.6 16,514.8 18,260.7

(308) (0) (0) (1,059) (4,889) (2,375) (0) (98) (82,574) (91,304)

Wisconsin 7.0-7.5 1,053.8 268.2 145.8 349.9 616.6 1,085.0 0.0 34.2 162.0 3,715.4

(5,269) (1,341) (729) (1,749) (3,083) (5,425) (0) (171) (810) (18,577)

7.5-8.0 1,417.2 235.5 23.7 361.7 223.0 779.3 0.0 0.0 364.2 3,404.5

(7,086) (1,177) (119) (1,808) (1,115) (3,896) (0) (0) (1,821) (17,023)

8.0-8.5 830.6 372.7 0.0 451.4 1,386.1 2,539.0 0.0 21.3 2,160.1 7,761.1

(4,153) (1,863) (0) (2,257) (6,930) (12,695) (0) (107) (10,800) (38,806)

8.5-9.0 25.5 8.1 0.0 11.7 300.8 1,347.3 0.0 62.8 6,661.0 8,417.3

(128) (41) (0) (58) (1,504) (6,737) (0) (314) (33,305) (42,087) 1 Federal waters begin at 3 nm with the exception of Texas, which begins at 9 nm. For Texas, area reported is 0 - 9, 9 - 12; and 12 - 50 nm.
44

Figure B1. United States offshore wind resource at 90 m above the surface.
45

Table B2. California offshore wind resource by wind speed interval, water depth and distance from shore within 50 nm of shore.

Distance from Shore (nm)

0 - 3 3 - 12 12 - 50

Depth Category

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

90 m Wind 

Speed Interval 

(m/s)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

7.0 - 7.5 266 236 257 101 457 4,554 8 23 5,537

(1,331) (1,181) (1,287) (504) (2,284) (22,770) (38) (115) (27,684)

7.5 - 8.0 239 257 190 79 596 3,855 0 33 19,616

(1,196) (1,285) (948) (394) (2,978) (19,273) (0) (165) (98,080)

8.0 - 8.5 125 178 282 7 106 4,539 0 0 17,822

(626) (891) (1,409) (36) (529) (22,695) (0) (0) (89,111)

8.5 - 9.0 43 142 176 1 38 4,560 0 0 17,892

(216) (708) (882) (3) (190) (22,799) (0) (0) (89,460)

9.0 - 9.5 2 19 15 0 1 988 0 0 12,160

(10) (94) (74) (0) (4) (4,940) (0) (0) (60,801)

9.5 - 10.0 0 6 14 0 0 656 0 0 14,555

(0) (30) (69) (0) (0) (3,280) (0) (0) (72,774)

>10.0 0 0 0 0 0 288 0 0 6,638

(0) (0) (1) (0) (0) (1,441) (0) (0) (33,188)

Total >7.0 676 838 934 187 1,197 19,440 8 56 94,220

(3,379) (4,189) (4,670) (937) (5,985) (97,198) (38) (279) (471,098)
46

Figure B2. California detailed map
47

Table B3. Connecticut offshore wind resource by wind speed interval, water depth and distance from shore within 50 nm of shore.

Distance from Shore (nm)

0 - 3 3 - 12 12 - 50

Depth Category

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

90 m Wind 

Speed Interval 

(m/s)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

7.0 - 7.5 500 30 0 0 0 0 0 0 0

(2,501) (151) (0) (0) (0) (0) (0) (0) (0)

7.5 - 8.0 617 83 1 0 0 0 0 0 0

(3,087) (415) (6) (0) (0) (0) (0) (0) (0)

8.0 - 8.5 35 5 0 0 0 0 0 0 0

(173) (25) (2) (0) (0) (0) (0) (0) (0)

8.5 - 9.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

9.0 - 9.5 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

9.5 - 10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

>10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

Total >7.0 1,152 118 2 0 0 0 0 0 0

(5,760) (592) (8) (0) (0) (0) (0) (0) (0)
48

Figure B3. Connecticut detailed map
49

Table B4. Delaware offshore wind resource by wind speed interval, water depth and distance from shore within 50 nm of shore.

Distance from Shore (nm)

0 - 3 3 - 12 12 - 50

Depth Category

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

90 m Wind 

Speed Interval 

(m/s)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

7.0 - 7.5 223 0 0 0 0 0 0 0 0

(1,116) (0) (0) (0) (0) (0) (0) (0) (0)

7.5 - 8.0 717 2 0 5 0 0 0 0 0

(3,583) (10) (0) (26) (0) (0) (0) (0) (0)

8.0 - 8.5 135 11 0 658 9 0 240 9 0

(677) (53) (0) (3,290) (43) (0) (1,202) (44) (0)

8.5 - 9.0 0 0 0 0 0 0 254 677 0

(0) (0) (0) (0) (0) (0) (1,270) (3,387) (0)

9.0 - 9.5 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

9.5 - 10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

>10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

Total >7.0 1,075 13 0 663 9 0 494 686 0

(5,375) (63) (0) (3,316) (43) (0) (2,472) (3,431) (0)
50

Figure B4. Delaware detailed map
51

Table B5. Georgia offshore wind resource by wind speed interval, water depth and distance from shore within 50 nm of shore.

Distance from Shore (nm)

0 - 3 3 - 12 12 - 50

Depth Category

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

90 m Wind 

Speed Interval 

(m/s)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

7.0 - 7.5 547 0 0 2,162 0 0 1,111 0 0

(2,737) (0) (0) (10,811) (0) (0) (5,553) (0) (0)

7.5 - 8.0 85 0 0 530 0 0 5,204 1,922 0

(426) (0) (0) (2,648) (0) (0) (26,021) (9,610) (0)

8.0 - 8.5 0 0 0 0 0 0 4 520 0

(0) (0) (0) (0) (0) (0) (19) (2,598) (0)

8.5 - 9.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

9.0 - 9.5 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

9.5 - 10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

>10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

Total >7.0 633 0 0 2,692 0 0 6,319 2,442 0

(3,164) (0) (0) (13,459) (0) (0) (31,594) (12,208) (0)
52

Figure B5. Georgia detailed map
53

Table B6. Hawaii offshore wind resource by wind speed interval, water depth and distance from shore within 50 nm of shore.

Distance from Shore (nm)

0 - 3 3 - 12 12 - 50

Depth Category

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

90 m Wind 

Speed Interval 

(m/s)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

7.0 - 7.5 111 97 2,631 0 43 2,213 44 117 13,615

(557) (486) (13,157) (0) (213) (11,067) (222) (584) (68,077)

7.5 - 8.0 66 107 2,404 0 145 5,052 7 251 34,268

(328) (535) (12,020) (0) (725) (25,258) (34) (1,254) (171,338)

8.0 - 8.5 92 115 2,364 0 15 4,756 0 0 25,700

(461) (574) (11,822) (0) (75) (23,778) (1) (1) (128,498)

8.5 - 9.0 66 67 2,105 0 0 2,626 0 0 9,050

(328) (335) (10,526) (0) (0) (13,128) (0) (0) (45,250)

9.0 - 9.5 26 39 996 0 0 1,853 0 0 4,866

(129) (195) (4,978) (0) (0) (9,265) (0) (0) (24,328)

9.5 - 10.0 22 40 666 0 0 1,065 0 0 4,927

(110) (199) (3,330) (0) (0) (5,324) (0) (0) (24,634)

>10.0 26 71 1,344 0 0 2,028 0 0 1,384

(132) (353) (6,720) (0) (0) (10,138) (0) (0) (6,918)

Total >7.0 409 535 12,511 0 203 19,592 51 368 93,808

(2,045) (2,677) (62,553) (0) (1,013) (97,958) (257) (1,839) (469,041)
54

Figure B6. Hawaii detailed map
55

Table B7. Illinois offshore wind resource by wind speed interval, water depth and distance from shore within 50 nm of shore.

Distance from Shore (nm)

0 - 3 3 - 12 12 - 50

Depth Category

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

90 m Wind 

Speed Interval 

(m/s)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

7.0 - 7.5 92 0 0 0 0 0 0 0 0

(458) (0) (0) (0) (0) (0) (0) (0) (0)

7.5 - 8.0 165 0 0 0 0 0 0 1 0

(823) (0) (0) (0) (1) (0) (0) (6) (0)

8.0 - 8.5 244 1 0 830 512 141 7 426 1,683

(1,221) (5) (0) (4,152) (2,561) (704) (35) (2,130) (8,414)

8.5 - 9.0 0 0 0 13 77 0 0 0 0

(0) (0) (0) (67) (383) (0) (0) (0) (0)

9.0 - 9.5 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

9.5 - 10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

>10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

Total >7.0 500 1 0 844 589 141 7 427 1,683

(2,502) (5) (0) (4,219) (2,944) (704) (35) (2,137) (8,414)
56

Figure B7. Illinois detailed map
57

Table B8. Indiana offshore wind resource by wind speed interval, water depth and distance from shore within 50 nm of shore.

Distance from Shore (nm)

0 - 3 3 - 12 12 - 50

Depth Category

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

90 m Wind 

Speed Interval 

(m/s)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

7.0 - 7.5 82 0 0 0 0 0 0 0 0

(410) (0) (0) (0) (0) (0) (0) (0) (0)

7.5 - 8.0 154 0 0 63 0 0 0 0 0

(769) (0) (0) (313) (0) (0) (0) (0) (0)

8.0 - 8.5 101 0 0 184 0 0 0 0 0

(507) (0) (0) (920) (0) (0) (0) (0) (0)

8.5 - 9.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

9.0 - 9.5 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

9.5 - 10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

>10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

Total >7.0 337 0 0 247 0 0 0 0 0

(1,687) (0) (0) (1,233) (0) (0) (0) (0) (0)
58

Figure B8. Indiana detailed map
59

Table B9. Louisiana offshore wind resource by wind speed interval, water depth and distance from shore within 50 nm of shore.

Distance from Shore (nm)

0 - 3 3 - 12 12 - 50

Depth Category

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

90 m Wind 

Speed Interval 

(m/s)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

7.0 - 7.5 7,760 29 0 7,825 643 1,460 11,164 5,479 13,682

(38,798) (143) (0) (39,126) (3,217) (7,302) (55,819) (27,396) (68,412)

7.5 - 8.0 155 0 0 1,625 0 0 8,170 2,229 2,854

(776) (0) (0) (8,123) (0) (0) (40,850) (11,143) (14,271)

8.0 - 8.5 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

8.5 - 9.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

9.0 - 9.5 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

9.5 - 10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

>10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

Total >7.0 7,915 29 0 9,450 643 1,460 19,334 7,708 16,537

(39,574) (143) (0) (47,249) (3,217) (7,302) (96,669) (38,539) (82,683)
60

Figure B9. Louisiana detailed map
61

Table B10. Maine offshore wind resource by wind speed interval, water depth and distance from shore within 50 nm of shore.

Distance from Shore (nm)

0 - 3 3 - 12 12 - 50

Depth Category

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

90 m Wind 

Speed Interval 

(m/s)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

7.0 - 7.5 787 91 12 8 5 4 0 0 0

(3,935) (456) (59) (39) (24) (18) (0) (0) (0)

7.5 - 8.0 797 285 19 7 20 14 0 0 0

(3,986) (1,427) (97) (33) (98) (70) (0) (0) (0)

8.0 - 8.5 777 441 74 63 386 235 0 0 0

(3,885) (2,204) (371) (317) (1,928) (1,173) (0) (0) (0)

8.5 - 9.0 513 614 158 18 219 1,402 0 0 407

(2,567) (3,070) (788) (91) (1,095) (7,010) (0) (0) (2,034)

9.0 - 9.5 142 390 309 26 469 3,504 0 58 3,531

(711) (1,950) (1,546) (129) (2,345) (17,520) (0) (289) (17,655)

9.5 - 10.0 6 25 42 1 38 1,460 0 7 13,906

(28) (124) (211) (5) (191) (7,299) (0) (37) (69,528)

>10.0 0 0 0 0 0 42 0 0 0

(0) (0) (0) (0) (0) (208) (0) (0) (0)

Total >7.0 3,022 1,846 615 123 1,136 6,659 0 65 17,843

(15,111) (9,231) (3,073) (615) (5,682) (33,297) (0) (326) (89,217)
62

Figure B10. Maine detailed map
63

Table B11. Maryland offshore wind resource by wind speed interval, water depth and distance from shore within 50 nm of shore.

Distance from Shore (nm)

0 - 3 3 - 12 12 - 50

Depth Category

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

90 m Wind 

Speed Interval 

(m/s)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

7.0 - 7.5 2,175 17 0 0 0 0 0 0 0

(10,877) (83) (0) (0) (0) (0) (0) (0) (0)

7.5 - 8.0 1,923 14 0 10 0 0 0 0 0

(9,613) (70) (0) (49) (0) (0) (0) (0) (0)

8.0 - 8.5 163 0 0 924 0 0 435 17 0

(817) (0) (0) (4,620) (0) (0) (2,177) (86) (0)

8.5 - 9.0 0 0 0 0 0 0 531 3,211 1,336

(0) (0) (0) (0) (0) (0) (2,656) (16,053) (6,681)

9.0 - 9.5 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

9.5 - 10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

>10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

Total >7.0 4,261 31 0 934 0 0 967 3,228 1,336

(21,306) (153) (0) (4,670) (0) (0) (4,833) (16,139) (6,681)
64

Figure B11. Maryland detailed map
65

Table B12. Massachusetts offshore wind resource by wind speed interval, water depth and distance from shore within 50 nm of shore.

Distance from Shore (nm)

0 - 3 3 - 12 12 - 50

Depth Category

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

90 m Wind 

Speed Interval 

(m/s)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

7.0 - 7.5 202 0 0 0 0 0 0 0 0

(1,008) (0) (0) (0) (0) (0) (0) (0) (0)

7.5 - 8.0 521 5 0 0 0 0 0 0 0

(2,607) (23) (0) (0) (0) (0) (0) (0) (0)

8.0 - 8.5 927 327 29 78 152 126 0 0 0

(4,637) (1,636) (143) (391) (760) (628) (0) (0) (0)

8.5 - 9.0 1,508 378 13 315 355 812 11 24 190

(7,541) (1,890) (63) (1,575) (1,773) (4,061) (57) (118) (952)

9.0 - 9.5 1,137 323 20 2,697 1,419 1,007 1,690 5,052 7,007

(5,685) (1,613) (100) (13,484) (7,093) (5,033) (8,449) (25,259) (35,037)

9.5 - 10.0 2 0 0 9 119 0 472 3,460 9,613

(10) (0) (0) (43) (596) (0) (2,361) (17,298) (48,063)

>10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

Total >7.0 4,298 1,033 61 3,099 2,044 1,944 2,173 8,535 16,810

(21,489) (5,163) (307) (15,493) (10,222) (9,721) (10,867) (42,674) (84,051)
66

Figure B12. Massachusetts detailed map
67

Table B13. Michigan offshore wind resource by wind speed interval, water depth and distance from shore within 50 nm of shore.

Distance from Shore (nm)

0 - 3 3 - 12 12 - 50

Depth Category

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

90 m Wind 

Speed Interval 

(m/s)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

7.0 - 7.5 3,411 331 244 143 50 268 1 0 12

(17,057) (1,653) (1,218) (713) (249) (1,340) (6) (0) (61)

7.5 - 8.0 4,633 1,258 635 3,069 2,916 2,991 14 108 2,448

(23,163) (6,291) (3,177) (15,345) (14,582) (14,955) (71) (542) (12,242)

8.0 - 8.5 2,588 1,253 769 2,771 5,890 9,412 31 876 7,496

(12,940) (6,267) (3,845) (13,853) (29,448) (47,059) (155) (4,381) (37,482)

8.5 - 9.0 139 156 397 145 551 8,581 118 1,384 22,834

(693) (781) (1,983) (726) (2,753) (42,904) (592) (6,920) (114,172)

9.0 - 9.5 0 0 0 0 0 70 115 250 8,285

(0) (0) (0) (0) (0) (350) (573) (1,248) (41,423)

9.5 - 10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

>10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

Total >7.0 10,771 2,998 2,044 6,127 9,407 21,322 279 2,618 41,076

(53,854) (14,991) (10,222) (30,636) (47,033) (106,608) (1,397) (13,090) (205,379)
68

Figure B13. Michigan detailed map
69

Table B14. Minnesota offshore wind resource by wind speed interval, water depth and distance from shore within 50 nm of shore.

Distance from Shore (nm)

0 - 3 3 - 12 12 - 50

Depth Category

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

90 m Wind 

Speed Interval 

(m/s)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

7.0 - 7.5 5 44 273 0 32 1,718 0 0 1,031

(25) (218) (1,363) (0) (158) (8,590) (0) (0) (5,155)

7.5 - 8.0 0 0 13 0 0 61 0 0 921

(0) (0) (64) (0) (0) (304) (0) (0) (4,603)

8.0 - 8.5 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

8.5 - 9.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

9.0 - 9.5 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

9.5 - 10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

>10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

Total >7.0 5 44 285 0 32 1,779 0 0 1,952

(25) (218) (1,427) (0) (158) (8,895) (0) (0) (9,759)
70

Figure B14. Minnesota detailed tables and maps
71

Table B15. New Hampshire offshore wind resource by wind speed interval, water depth and distance from shore within 50 nm of shore.

Distance from Shore (nm)

0 - 3 3 - 12 12 - 50

Depth Category

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

90 m Wind 

Speed Interval 

(m/s)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

7.0 - 7.5 19 0 0 0 0 0 0 0 0

(93) (0) (0) (0) (0) (0) (0) (0) (0)

7.5 - 8.0 46 0 0 0 0 0 0 0 0

(229) (0) (0) (0) (0) (0) (0) (0) (0)

8.0 - 8.5 45 30 0 7 76 14 0 0 0

(223) (148) (0) (34) (378) (70) (0) (0) (0)

8.5 - 9.0 0 8 7 0 12 256 0 10 42

(0) (40) (36) (0) (62) (1,279) (0) (51) (211)

9.0 - 9.5 0 0 0 0 0 0 0 35 66

(0) (0) (0) (0) (0) (0) (0) (176) (332)

9.5 - 10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

>10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

Total >7.0 109 38 7 7 88 270 0 45 109

(545) (188) (36) (35) (439) (1,348) (0) (227) (543)
72

Figure B15. New Hampshire detailed map
73

Table B16. New Jersey offshore wind resource by wind speed interval, water depth and distance from shore within 50 nm of shore.

Distance from Shore (nm)

0 - 3 3 - 12 12 - 50

Depth Category

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

90 m Wind 

Speed Interval 

(m/s)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

7.0 - 7.5 520 0 0 8 0 0 0 0 0

(2,601) (0) (0) (41) (0) (0) (0) (0) (0)

7.5 - 8.0 960 0 0 519 28 1 0 0 0

(4,802) (0) (0) (2,593) (140) (4) (0) (0) (0)

8.0 - 8.5 777 0 0 2,765 127 3 899 372 22

(3,885) (0) (0) (13,824) (636) (16) (4,497) (1,862) (108)

8.5 - 9.0 13 0 0 215 0 0 2,020 10,382 304

(66) (0) (0) (1,074) (0) (0) (10,098) (51,912) (1,519)

9.0 - 9.5 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

9.5 - 10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

>10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

Total >7.0 2,271 0 0 3,506 155 4 2,919 10,755 325

(11,353) (0) (0) (17,532) (775) (20) (14,595) (53,774) (1,627)
74

Figure B16. New Jersey detailed map
75

Table B17. New York offshore wind resource by wind speed interval, water depth and distance from shore within 50 nm of shore.

Distance from Shore (nm)

0 - 3 3 - 12 12 - 50

Depth Category

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

90 m Wind 

Speed Interval 

(m/s)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

7.0 - 7.5 1,048 54 0 3 0 0 0 0 0

(5,239) (271) (0) (14) (0) (0) (0) (0) (0)

7.5 - 8.0 1,983 355 12 473 609 867 0 0 60

(9,915) (1,774) (58) (2,363) (3,045) (4,334) (0) (0) (300)

8.0 - 8.5 1,329 603 196 376 536 3,122 42 13 2,107

(6,646) (3,015) (982) (1,878) (2,679) (15,610) (211) (63) (10,537)

8.5 - 9.0 535 111 1 1,043 94 0 261 728 104

(2,675) (553) (3) (5,213) (469) (0) (1,307) (3,639) (522)

9.0 - 9.5 5 0 0 392 1,408 0 6 4,926 716

(27) (0) (0) (1,959) (7,038) (0) (32) (24,631) (3,580)

9.5 - 10.0 0 0 0 0 0 0 0 1,818 3,505

(0) (0) (0) (0) (0) (0) (0) (9,088) (17,524)

>10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

Total >7.0 4,901 1,122 209 2,286 2,646 3,989 310 7,484 6,493

(24,503) (5,612) (1,043) (11,428) (13,230) (19,944) (1,550) (37,420) (32,463)
76

Figure B17. New York detailed map
77

Table B18. North Carolina offshore wind resource by wind speed interval, water depth and distance from shore within 50 nm of shore.

Distance from Shore (nm)

0 - 3 3 - 12 12 - 50

Depth Category

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

90 m Wind 

Speed Interval 

(m/s)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

7.0 - 7.5 1,847 0 0 0 0 0 0 0 0

(9,237) (0) (0) (0) (0) (0) (0) (0) (0)

7.5 - 8.0 3,002 0 0 1,096 0 0 0 0 0

(15,010) (0) (0) (5,481) (0) (0) (0) (0) (0)

8.0 - 8.5 3,920 0 0 4,654 0 0 4,035 747 299

(19,600) (1) (0) (23,269) (0) (0) (20,174) (3,733) (1,496)

8.5 - 9.0 105 0 0 2,964 261 9 6,382 14,520 15,633

(525) (0) (0) (14,821) (1,307) (45) (31,912) (72,598) (78,167)

9.0 - 9.5 0 0 0 0 0 0 0 16 0

(0) (0) (0) (0) (0) (0) (0) (80) (0)

9.5 - 10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

>10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

Total >7.0 8,874 0 0 8,714 261 9 10,417 15,282 15,933

(44,372) (1) (0) (43,570) (1,307) (45) (52,087) (76,411) (79,663)
78

Figure B18. North Carolina detailed map
79

Table B19. Ohio offshore wind resource by wind speed interval, water depth and distance from shore within 50 nm of shore.

Distance from Shore (nm)

0 - 3 3 - 12 12 - 50

Depth Category

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

90 m Wind 

Speed Interval 

(m/s)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

7.0 - 7.5 341 0 0 0 0 0 0 0 0

(1,705) (0) (0) (0) (0) (0) (0) (0) (0)

7.5 - 8.0 1,107 0 0 1,960 0 0 0 0 0

(5,534) (0) (0) (9,799) (0) (0) (0) (0) (0)

8.0 - 8.5 565 0 0 2,193 0 0 3,071 0 0

(2,826) (0) (0) (10,965) (0) (0) (15,356) (0) (0)

8.5 - 9.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

9.0 - 9.5 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

9.5 - 10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

>10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

Total >7.0 2,013 0 0 4,153 0 0 3,071 0 0

(10,065) (0) (0) (20,765) (0) (0) (15,356) (0) (0)
80

Figure B19. Ohio detailed map
81

Table B20. Oregon offshore wind resource by wind speed interval, water depth and distance from shore within 50 nm of shore.

Distance from Shore (nm)

0 - 3 3 - 12 12 - 50

Depth Category

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

90 m Wind 

Speed Interval 

(m/s)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

7.0 - 7.5 356 21 0 1 9 1 0 0 0

(1,779) (103) (0) (4) (46) (6) (0) (0) (0)

7.5 - 8.0 523 319 38 46 232 335 0 0 0

(2,615) (1,596) (188) (232) (1,159) (1,675) (0) (0) (0)

8.0 - 8.5 198 277 7 19 596 2,558 0 0 4,989

(991) (1,385) (33) (95) (2,978) (12,792) (0) (0) (24,947)

8.5 - 9.0 64 99 1 0 108 1,967 0 46 11,640

(320) (494) (3) (0) (540) (9,836) (0) (228) (58,201)

9.0 - 9.5 64 55 39 0 33 615 0 0 6,588

(321) (277) (193) (0) (163) (3,074) (0) (0) (32,941)

9.5 - 10.0 47 80 15 0 34 635 0 0 5,255

(237) (402) (73) (0) (169) (3,173) (0) (0) (26,273)

>10.0 0 19 33 0 18 1,369 0 0 4,546

(1) (97) (166) (0) (91) (6,843) (0) (0) (22,730)

Total >7.0 1,253 871 131 66 1,029 7,480 0 46 33,019

(6,264) (4,354) (656) (332) (5,146) (37,399) (0) (228) (165,093)
82

Figure B20. Oregon detailed map
83

Table B21. Pennsylvania offshore wind resource by wind speed interval, water depth and distance from shore within 50 nm of shore.

Distance from Shore (nm)

0 - 3 3 - 12 12 - 50

Depth Category

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

90 m Wind 

Speed Interval 

(m/s)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

7.0 - 7.5 34 0 0 0 0 0 0 0 0

(171) (0) (0) (0) (0) (0) (0) (0) (0)

7.5 - 8.0 113 0 0 53 44 0 0 0 0

(567) (0) (0) (266) (221) (0) (0) (0) (0)

8.0 - 8.5 276 1 0 751 358 0 223 70 0

(1,381) (4) (0) (3,754) (1,790) (0) (1,114) (351) (0)

8.5 - 9.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

9.0 - 9.5 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

9.5 - 10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

>10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

Total >7.0 424 1 0 804 402 0 223 70 0

(2,119) (4) (0) (4,020) (2,012) (0) (1,114) (351) (0)
84

Figure B21. Pennsylvania detailed map
85

Table B22. Rhode Island offshore wind resource by wind speed interval, water depth and distance from shore within 50 nm of shore.

Distance from Shore (nm)

0 - 3 3 - 12 12 - 50

Depth Category

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

90 m Wind 

Speed Interval 

(m/s)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

7.0 - 7.5 216 8 0 0 0 0 0 0 0

(1,082) (40) (0) (0) (0) (0) (0) (0) (0)

7.5 - 8.0 123 3 0 0 0 0 0 0 0

(616) (14) (0) (0) (0) (0) (0) (0) (0)

8.0 - 8.5 140 40 0 35 69 0 0 0 0

(700) (199) (0) (173) (346) (0) (0) (0) (0)

8.5 - 9.0 120 93 0 184 274 0 0 0 0

(602) (465) (0) (918) (1,371) (0) (0) (0) (0)

9.0 - 9.5 54 18 0 176 783 0 0 430 1

(269) (88) (0) (880) (3,914) (0) (0) (2,151) (6)

9.5 - 10.0 0 0 0 0 6 0 0 967 1,387

(0) (0) (0) (0) (29) (0) (0) (4,836) (6,934)

>10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

Total >7.0 653 161 0 394 1,132 0 0 1,397 1,388

(3,267) (806) (0) (1,970) (5,660) (0) (0) (6,987) (6,940)
86

Figure B22. Rhode Island detailed map
87

Table B23. South Carolina offshore wind resource by wind speed interval, water depth and distance from shore within 50 nm of shore.

Distance from Shore (nm)

0 - 3 3 - 12 12 - 50

Depth Category

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

90 m Wind 

Speed Interval 

(m/s)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

7.0 - 7.5 848 0 0 608 0 0 0 0 0

(4,241) (0) (0) (3,042) (0) (0) (0) (0) (0)

7.5 - 8.0 594 0 0 3,054 0 0 4,268 287 0

(2,968) (0) (0) (15,269) (0) (0) (21,338) (1,435) (0)

8.0 - 8.5 23 0 0 1,609 0 0 4,151 3,926 674

(115) (0) (0) (8,047) (0) (0) (20,757) (19,628) (3,372)

8.5 - 9.0 0 0 0 0 0 0 2,027 3,110 870

(0) (0) (0) (0) (0) (0) (10,135) (15,548) (4,349)

9.0 - 9.5 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

9.5 - 10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

>10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

Total >7.0 1,465 0 0 5,272 0 0 10,446 7,322 1,544

(7,323) (0) (0) (26,358) (0) (0) (52,230) (36,611) (7,722)
88

Figure B23. South Carolina detailed map
89

Table B24. Texas offshore wind resource by wind speed interval, water depth and distance from shore within 50 nm of shore.

Distance from Shore (nm)

0 – 9* 9 - 12 12 - 50

Depth Category

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

90 m Wind 

Speed Interval 

(m/s)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

7.0 - 7.5 1,786 0 0 96 0 0 137 0 0

(8,928) (0) (1) (481) (0) (0) (686) (0) (0)

7.5 - 8.0 9,046 0 0 1,165 0 0 8,045 6,175 392

(45,230) (0) (0) (5,826) (0) (0) (40,226) (30,873) (1,958)

8.0 - 8.5 5,929 125 0 742 137 0 584 4,443 4,597

(29,643) (627) (0) (3,711) (684) (0) (2,918) (22,214) (22,985)

8.5 - 9.0 3,798 601 0 43 945 0 0 3,211 3,675

(18,990) (3,005) (0) (215) (4,726) (0) (0) (16,055) (18,373)

9.0 - 9.5 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

9.5 - 10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

>10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

Total >7.0 20,558 726 0 2,046 1,082 0 8,766 13,828 8,663

(102,791) (3,632) (1) (10,232) (5,410) (0) (43,829) (69,142) (43,316)

*Federal waters begin at 9 nm for Texas
90

Figure B24. Texas detailed map
91

Table B25. Virginia offshore wind resource by wind speed interval, water depth and distance from shore within 50 nm of shore.

Distance from Shore (nm)

0 - 3 3 - 12 12 - 50

Depth Category

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

90 m Wind 

Speed Interval 

(m/s)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

7.0 - 7.5 889 0 0 0 0 0 0 0 0

(4,446) (0) (0) (0) (0) (0) (0) (0) (0)

7.5 - 8.0 3,606 15 0 37 0 0 0 0 0

(18,028) (77) (0) (185) (0) (0) (0) (0) (0)

8.0 - 8.5 1,136 2 0 2,986 0 0 2,356 69 0

(5,679) (10) (0) (14,929) (0) (0) (11,780) (345) (0)

8.5 - 9.0 0 0 0 24 0 0 2,030 4,840 900

(0) (0) (0) (119) (0) (0) (10,152) (24,199) (4,500)

9.0 - 9.5 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

9.5 - 10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

>10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

Total >7.0 5,630 17 0 3,047 0 0 4,386 4,909 900

(28,152) (87) (0) (15,233) (0) (0) (21,932) (24,544) (4,500)
92

Figure B25. Virginia detailed map
93

Table B26. Washington offshore wind resource by wind speed interval, water depth and distance from shore within 50 nm of shore.

Distance from Shore (nm)

0 - 3 3 - 12 12 - 50

Depth Category

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

90 m Wind 

Speed Interval 

(m/s)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

7.0 - 7.5 623 133 57 232 350 177 0 0 0

(3,115) (667) (286) (1,159) (1,751) (884) (0) (0) (1)

7.5 - 8.0 371 0 0 203 842 1,173 0 0 2,033

(1,853) (0) (0) (1,015) (4,208) (5,865) (0) (0) (10,166)

8.0 - 8.5 62 0 0 212 978 475 0 20 16,515

(308) (0) (0) (1,059) (4,889) (2,375) (0) (98) (82,574)

8.5 - 9.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

9.0 - 9.5 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

9.5 - 10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

>10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

Total >7.0 1,055 133 57 647 2,170 1,825 0 20 18,548

(5,276) (667) (286) (3,233) (10,849) (9,124) (0) (98) (92,741)
94

Figure B26. Washington detailed map
95

Table B27. Wisconsin offshore wind resource by wind speed interval, water depth and distance from shore within 50 nm of shore.

Distance from Shore (nm)

0 - 3 3 - 12 12 - 50

Depth Category

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

Shallow

(0 - 30 m)

Transitional

(30 - 60m)

Deep

(> 60m)

90 m Wind 

Speed Interval 

(m/s)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

Area km2

(MW)

7.0 - 7.5 1,054 268 146 350 617 1,085 0 34 162

(5,269) (1,341) (729) (1,749) (3,083) (5,425) (0) (171) (810)

7.5 - 8.0 1,417 235 24 362 223 779 0 0 364

(7,086) (1,177) (119) (1,808) (1,115) (3,896) (0) (0) (1,821)

8.0 - 8.5 831 373 0 451 1,386 2,539 0 21 2,160

(4,153) (1,863) (0) (2,257) (6,930) (12,695) (0) (107) (10,800)

8.5 - 9.0 26 8 0 12 301 1,347 0 63 6,661

(128) (41) (0) (58) (1,504) (6,737) (0) (314) (33,305)

9.0 - 9.5 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

9.5 - 10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

>10.0 0 0 0 0 0 0 0 0 0

(0) (0) (0) (0) (0) (0) (0) (0) (0)

Total >7.0 3,327 884 169 1,175 2,526 5,751 0 118 9,347

(16,636) (4,422) (847) (5,873) (12,632) (28,753) (0) (592) (46,737)
96

Figure B27. Wisconsin detailed map
F1147-E(10/2008)

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June 2010

2. REPORT TYPE

Technical Report

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4. TITLE AND SUBTITLE

Assessment of Offshore Wind Energy Resources for the United 

States

5a. CONTRACT NUMBER

DE-AC36-08-GO28308

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6. AUTHOR(S)

M. Schwartz, D. Heimiller, S. Haymes, and W. Musial

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NREL/TP-500-45889

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WE10.1211

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National Renewable Energy Laboratory

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14. ABSTRACT (Maximum 200 Words)

This report summarizes the offshore wind resource potential for the contiguous United States and Hawaii as of May 

2009. The development of this assessment has evolved over multiple stages as new regional meso-scale 

assessments became available, new validation data was obtained, and better modeling capabilities were 

implemented. It is expected that further updates to the current assessment will be made in future reports.

15. SUBJECT TERMS

offshore wind resource potential; United States offshore wind; assessment of offshore wind; meso-scale assessment; 

modeling of offshore wind

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