April 2026 high tide flooding predictions

Powerful Waves crash against the shores of Westport, WA during the King Tide, creating dramatic waves, flooding, and coastal erosion © Shutterstock, AdventuringDuo

Monthly High Tide Flooding Outlook - April 2026

After several months where few harbors were predicted to flood, in April NOAA raises its predictions for the possibility of so-called "Sunny Day" flooding to include more than a dozen harbors in the Northeast and Mid-Atlantic, as well as three on the West Coast, two on the Big Island of Hawaii, and six in the Southeast and Gulf Coast.

Almost every major port from Bar Harbor, Maine, to Cape May, New Jersey, that has an active tide station and a validated data model to support a prediction has the possibility of flooding this month, most notably during the full moon, on April 1, and the new moon, on April 17. Higher than normal high tides (and lower than usual low tides, of course) occur during the perigean spring tide, when the moon is new and closest to Earth.

Note that a harbor's absence from this list, despite it being in proximity to a harbor that is (for example: Montauk, New York, and Woods Hole, Massachusetts, both of which are near harbors that are listed as seeing possible flooding, don't make the list themselves), does not mean that flooding is not possible. Instead, it simply means that NOAA either does not have a sufficiently validated model to make an accurate prediction, or that the local hydrodynamics makes such a prediction impossible.

April 1 - Full Moon
April 17 - New Moon

View the detailed flooding report for harbors in every region below, and make sure to print your tide charts from US Harbors to be prepared for the high water level days in your favorite harbor.

Northeast: Possible & Likely Flood Days

• Bar Harbor, ME — POSSIBLE April 17-21
• Portland, ME — POSSIBLE April 18-21
• Boston, MA — POSSIBLE April 18-21
• Providence, RI — POSSIBLE April 16-19
• Newport, RI — POSSIBLE April 17-19
• Bridgeport, CT — POSSIBLE April 16; 18-20

• Kings Point, NY — POSSIBLE April 16-21
• The Battery, NY — POSSIBLE April 16-20
• Bergen Point West Reach, NY — POSSIBLE April 17-19
• Sandy Hook, NJ — POSSIBLE April 16-20
• Atlantic City, NJ — POSSIBLE April 18, 19
• Cape May, NJ — POSSIBLE April 17-19; 21
• Lewes, DE — POSSIBLE April 18, 19, 21
• Sewells Point, VA — POSSIBLE April 17-20

• Duck, NC — POSSIBLE April 17-19
• Fort Pulaski, GA — POSSIBLE April 17, 18

• Bay Waveland Yacht Club, MS — POSSIBLE April 19-22
• Morgans Point, Barbours Cut, TX — POSSIBLE April 18-24
• Eagle Point, Galveston Bay, TX — POSSIBLE April 4-13; 16-30

• North Spit, CA — POSSIBLE April 19, 20
• South Beach, OR — POSSIBLE April 19
• Toke Point, WA — POSSIBLE April 19, 20

Kauai:

• Coastal flooding based primarily on tides is unlikely this month.

• Coastal flooding based primarily on tides is unlikely this month.

• Coastal flooding based primarily on tides is unlikely this month.

• Kawaihae, HI — POSSIBLE April 18, 19
• Hilo, Hilo Bay, Kuhio Bay, HI — POSSIBLE April 18

About these Predictions: "These flooding likelihoods are derived from a probabilistic model that incorporates tide predictions, sea level rise trends, and seasonal changes in coastal sea level to predict the potential that a higher than normal high tide may exceed established National Ocean Service flood thresholds. During these periods, high tide flooding may occur in flood-prone areas." NOAA.