NOAA High Tide Bulletin
SPRING 2021: When you may experience higher than normal tides between March and May, 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.
Want to dig deeper? View the latest annual report summarizing high tide flooding events in 2019 and our high tide flooding outlook through April 2021. This 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.
Select your region to see when you may experience higher than normal tides that may cause flooding.
The NOAA Coastal Inundation Dashboard provides real-time water levels with forecasts out to 48 hours for all tidal stations.
View an archive of past high tide flooding dates for all regions.
CO-OPS is the NOAA tides and currents office.
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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:
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:
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: