The rising and falling of the sea is a phenomenon upon which we can always depend. 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. This bulletin tells you when you may experience higher than normal high tides for the period of time between December 2020 and February 2021.
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 a region below to see when you may experience higher than normal tides from December 2020 and February 2021. 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.
Includes Maine, New Hampshire, Massachusetts, Rhode Island, Connecticut, and New York
Tide stations at the following locations have the greatest chance of seeing high tide flooding:
Tide stations at the following locations have the greatest chance of seeing high tide flooding:
Includes New Jersey, Delaware, Pennsylvania, Maryland, District of Columbia, Virginia.
Tide stations at the following locations have the greatest chance of seeing high tide flooding:
Includes North Carolina, South Carolina, Georgia, Eastern Florida coast.
Includes Texas, Louisiana, Mississippi, Alabama, Western Florida coast.
Includes California, Oregon, Washington State.
Tide stations at the following locations have the greatest chance of seeing high tide flooding:
Includes Hawaii, Guam, American Samoa, Midway, Kwajalein, and Wake Island.
View the latest report summarizing high tide flooding events in 2019 and our high tide flooding outlook through April 2021. The report is based on new, national flooding thresholds. It focuses on more impactful, deeper floods at some locations and expands the outlook to about 100 coastal locations.
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