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1. Home
2. News
3. High Tide Flooding Archive
4. High Tide Bulletin: Summer 2021

NOAA High Tide Bulletin
          Summer 2021: When you may experience higher than normal tides
            between June and August, 2021.


Tides are the regular rise and
          fall of the sea surface caused by the gravitational pull of the moon and sun and their position relative to
          the earth. There are some factors that cause the tides to be higher than what is "normally" seen from day to
          day. Depending on non-tidal conditions (wind, storms, etc.), regions may experience impacts before or after
          the dates mentioned here. Higher than normal high tides alone do not necessarily cause coastal flooding. However, they are becoming increasingly impactful due to continued sea level rise. High tide
            flooding that inundates busy streets, and washes out beaches is more likely to occur during these periods depending on your location along the coast. More severe flooding may result if adverse weather — heavy rains, strong wind or big waves — conditions are present.  We also publish annual high tide flooding reports that present a broad outlook of what to expect for a given year in terms of high tide flooding, as well as a summary of high tide flooding events for the previous calendar year.
 Select Your Region Select your region to see when you may experience higher than normal tides that may cause flooding. NOAA Coastal Inundation Dashboard The NOAA Coastal Inundation Dashboard provides real-time water levels with forecasts out to 48 hours for all tidal stations. High Tide Flooding Bulletin: Historical
                  Archive View an archive of past high tide flooding dates for all regions. Center for Operational Oceanographic
                  Products and Services (CO-OPS) CO-OPS is the NOAA tides and currents office. Print High Tide Bulletin Print or save this bulletin as a PDF document.
 NORTHEAST OUTLOOK
 Dates: June 22 - June 27, 2021
                          No dates in July
                          No dates in August Locations: Tide stations at the following locations have the greatest chance of seeing high tide
                          flooding: Bar Harbor, Maine; Portland, Maine; Boston, Massachusetts; Providence, Rhode Island; Kings Point, New York
                            Visit the NOAA Coastal Inundation Dashboard for this region to view real-time water levels with forecasts out to 48 hours.
 Why will they be higher than normal? A perigean spring tide will be occurring in June. This is when the moon is either new or full and closest to earth.  Higher than normal high tides and lower than normal low tides will occur.
                            Tides will increase leading up to and after the June 21 summer solstice, due to the position of the sun relative to the earth's equator.
                            Mean sea level is typically higher in the summer due to changing weather patterns and increasing water temperatures. What kind of impact might I expect along the coast? Low lying areas may flood, however high tides alone will likely not cause a significant impact on the coast in most areas unless accompanied by a storm or strong winds.
                            Lower than normal low tides will also occur.
 MID-ATLANTIC OUTLOOK
 Dates: June 22 - June 27, 2021
                          No dates in July
                          No dates in August Locations: Tide stations at the following locations have the greatest chance of seeing high tide
            flooding: The Battery, New York; Bergen Point, New York; Sandy Hook, New Jersey; Atlantic City, New Jersey; Cape May, New Jersey; Lewes, Delaware
              Visit the NOAA Coastal Inundation Dashboard for this region to view real-time water levels with forecasts out to 48 hours.
 Why will they be higher than normal? A perigean spring tide will be occurring in June. This is when the
              moon is either new or full and closest to earth. Higher than normal high tides and lower than normal low tides
              will occur.
              Tides will increase leading up to and after the June 21 summer solstice, due to the position of the sun relative to the earth's equator.
              Mean sea level is typically higher in the summer due to changing weather patterns and increasing water temperatures. What kind of impact might I expect along the coast? Minor tidal flooding along the coast will occur, particularly in low-lying areas.
                            If a storm occurs at this time, increased levels of tidal flooding and coastal erosion may occur.
                            Lower than normal low tides will also occur.
 SOUTHEAST OUTLOOK
 Dates: June 22 - June 27, 2021
              No dates in July
              No dates in August Locations: Tide stations at the following locations have the greatest chance of seeing high tide
            flooding: Duck, North Carolina; Myrtle Beach, South Carolina; Charleston, South Carolina; Fort Pulaski, Georgia
              Visit the NOAA Coastal Inundation Dashboard for this region to view real-time water levels with forecasts out to 48 hours.
 Why will they be higher than normal? A perigean spring tide will be occurring in June. This is when the
              moon is either new or full and closest to earth. Higher than normal high tides and lower than normal low tides
              will occur.
              Tides will increase leading up to and after the June 21
              summer solstice, due to the position of the sun relative to the earth's equator.
              Mean sea level is typically higher in the late Summer due to changing weather patterns and increasing water temperatures. What kind of impact might I expect along the coast? Minor tidal flooding along the coast will occur, particularly in low-lying areas.
            If a storm occurs at this time, increased levels of tidal flooding and coastal erosion may occur.
              Lower than normal low tides will also occur.
 GULF COAST OUTLOOK
 Dates: No dates June - August, 2021 Locations: Texas, Louisiana, Mississippi, Alabama, Western Florida coast.
 Why will they be higher than normal? The Gulf Coast will not be significantly impacted. Why won’t they be impacted? In many locations of the Gulf Coast, the tidal range is relatively small compared to other regions of the U.S, so they will not be as significantly impacted by a perigean spring tide.
 WEST COAST OUTLOOK
 Dates: June 22-26, 2021
                July 21-24, 2021
                No dates in August Locations: Tide stations at the following locations have the greatest chance of seeing high tide
                flooding: Humboldt Bay, California; Santa Monica, California, San Diego, California
                  Visit the NOAA Coastal Inundation Dashboard for this region to view real-time water levels with forecasts out to 48 hours.
 Why will they be higher than normal? A perigean spring tide will be occurring in June. This is when the moon is either new or full and closest to earth. Higher than normal high tides and lower than normal low tides will occur.
                  Tides will increase leading up to and after the June 21 summer solstice, due to the position of the sun relative to the earth's equator.
                  Mean sea level is typically higher in the late Summer due to changing weather patterns and increasing water temperatures. What kind of impact might I expect along the coast? Minor tidal flooding along the coast, in particular in low-lying areas
                  If a storm occurs at this time, increased levels of tidal flooding and coastal erosion may occur
                  Lower than normal low tides will also occur.
 PACIFIC ISLANDS OUTLOOK
 Dates: June 22-27, 2021
            No dates in July
            No dates in August Locations: Tide stations at the following locations have the greatest chance of seeing high tide
            flooding: Hawaii, Guam, American Samoa, Midway, Kwajalein, and Wake Island.
              Visit the NOAA Coastal Inundation Dashboard for this region to view real-time water levels with forecasts out to 48 hours.
 Why will they be higher than normal? A perigean spring tide will be occurring in June. This is when the
              moon is either new or full and closest to earth. Higher than normal high tides and lower than normal low tides
              will occur.
              Tides will increase leading up to and after the June 21
              summer solstice, due to the position of the sun relative to the earth's equator.
              Mean sea level is typically higher in the late Summer due to changing weather patterns and increasing water temperatures. What kind of impact might I expect along the coast? Minor tidal flooding along the coast, in particular in low-lying areas
              If a storm occurs at this time, increased levels of tidal flooding and coastal erosion may occur
              Lower than normal low tides will also occur.
 ALASKA OUTLOOK
 Dates: June 23-27, 2021
            No dates in July
            No dates in August Locations: Tide stations at the following locations have the greatest chance of seeing high tide
            flooding: Alaska
              Visit the NOAA Coastal Inundation Dashboard for this region to view real-time water levels with forecasts out to 48 hours.
 Why will they be higher than normal? A perigean spring tide will be occurring in June. This is when the
              moon is either new or full and closest to earth. Higher than normal high tides and lower than normal low tides
              will occur.
              Tides will increase leading up to and after the June 21
              summer solstice, due to the position of the sun relative to the earth's equator.
              Mean sea level is typically higher in the late Summer due to
              changing weather
              patterns and increasing water temperatures. What kind of impact might I expect along the coast? Due to the topography, in particular for southeast Alaska (less low lying areas), tidal flooding will generally not have a significant impact on the coast unless there is a severe storm. Lower than normal low tides will also occur.
              Lower than normal low tides will also occur.


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