The mariner should be cautioned that during times when weather conditions differ from what is considered average for the area, corresponding differences between predicted levels and those actually observed will be noted. Generally, prolonged onshore winds or a low barometric pressure can produce higher levels than predicted, while the opposite can result in lower levels than predicted. During times of storm surges or when extreme weather conditions are imminent, it would be prudent for the marine to keep closely advised by local weather forecasts as they relate to the effects upon the tide levels. This is a very full featured harmonic tide and current predictor which produces graphic or tabular output for many sites. This system will allow you to calculate tidal predictions for more than 3000 tide stations predicted by OPSD , a division of the NOS which, in turn, is a division of NOAA .
Output is tabular and predictions cover the current year.
This information is provided by the Bodega Marine Laboratory solely for the convenience of those who work or play in the ocean. The Laboratory has no control over the accuracy or reliability of the information included here. As always, you are responsible for your own safety when venturing into the ocean. This page provides a frequently updated, map-format display of wave heights, wave time intervals, and wind directions at stations along the northern California coast. It's the same information broadcast on the National Weather Service's short-wave radio broadcasts, but for many users it's more accessible and easier to understand.