High Tide Flooding Outlook for October 2025

Posted October 1, 2025
Last Updated September 30, 2025 @ 7:18pm

Monthly High Tide Flooding Outlook – October 2025

After several months of enjoying low flooding potential, many locations in the East, West, and Gulf Coasts find themselves facing the likelihood of high-tide flooding in October. Major harbors such as Boston, Charleston, and Galveston are all likely to see flooding on or about the full moon, on October 6, and the new moon, on October 21, during what are known as the spring tides. Flooding is possible in the Chesapeake, while the Southeast is likely to see its highest tides of the year this month and may see flooding due to water levels alone (impacts of weather may exacerbate these impacts).

Higher than normal high tides and lower than normal low tides will occur around the perigean spring tide, when the Moon is full and closest to Earth. Mean sea level is generally higher in the early fall months due to warmer, expanding ocean water and changes in weather patterns.

Note that while NOAA only makes these flooding predictions for harbors with National Ocean Service water level stations, other locations along the coast may experience similar high-water events during these time periods. In addition, real-time weather conditions, including wind direction and storm surge, may also increase the potential for flooding. In all locations, higher than normal high tides (and lower low tides) should be expected on or around the full moon, on October 6, and the new moon, on October 21.

October 6 – Full Moon
October 21 – New Moon

Make sure to print out the monthly tide chart from USHarbors so that you can stay on top of any potential flooding events in your favorite harbor.

Northeast: Possible & Likely Flood Days

Bangor, ME — POSSIBLE October 7, 8, 10; LIKELY October 9
Portland, ME — POSSIBLE October 8-11
Boston, MA — POSSIBLE October 7, 8, 11; LIKELY October 9, 10
Providence, RI — POSSIBLE October 6-10
Newport, RI — POSSIBLE October 7-10
Bridgeport, CT — POSSIBLE October 6-11
Kings Point, NY — POSSIBLE October 5, 6; 10,11; 19-21; LIKELY October 7, 8, 9
The Battery, NY — POSSIBLE October 5-11
Bergen Point West Reach, NY — POSSIBLE October 5-11

Mid-Atlantic: Possible & Likely Flood Days

Sandy Hook, NJ — POSSIBLE October 5-11
Atlantic City, NJ — POSSIBLE October 5-12
Cape May, NJ — POSSIBLE October 4-12
Lewes, DE — POSSIBLE October 4-13; October 22
Lewisetta, VA — POSSIBLE October 1-26; October 31
Windmill Point, VA — POSSIBLE October 1-25
Wachapreague, VA — POSSIBLE October 4-13; October 19-24
Kiptopeke, VA — POSSIBLE October 4-12; October 19-23
Sewells Point, VA — POSSIBLE October 2-26

Southeast: Possible & Likely Flood Days

Duck, NC — POSSIBLE October 4-7; 9-13; 19-24; LIKELY October 8
Beaufort, Duke Marine Lab, NC — POSSIBLE October 6-12
Springmaid Pier, SC — POSSIBLE October 6, 7; 10, 11; LIKELY October 8, 9
Charleston, SC — POSSIBLE October 5, 6, 7; 10, 11, 12; LIKELY October 8, 9
Fort Pulaski, GA — POSSIBLE October 6, 7; 10, 11; LIKELY October 8, 9
Fernandina Beach, FL — POSSIBLE October 6, 7, 8; 10, 11, 12; LIKELY October 9
Mayport (Bar Pilots Dock), FL — POSSIBLE October 6-12
Trident Pier, Port Canaveral, FL — POSSIBLE October 5, 6, 7; 11, 12, 13; LIKELY October 8, 9, 10
Virginia Key, FL — POSSIBLE October 5-11

Gulf Coast: Possible & Likely Flood Days

Cedar Key, FL — POSSIBLE October 5-12
Pensacola, FL — POSSIBLE October 9-14
Dauphin Island, AL — POSSIBLE October 1; 8-14; 23-27
Bay Waveland Yacht Club, MS — POSSIBLE October 1-3; 8-15; 21-28
Morgans Point, Barbours Cut, TX — POSSIBLE October 1-4; 6-17; 20-31
Eagle Point, Galveston Bay, TX — POSSIBLE October 1-7; 14-20; 23-31; LIKELY October 8-13; 21, 22
Galveston Pier 21, TX — POSSIBLE October 1-7; 14-20; 23-31; LIKELY October 8-13; 21, 22
Rockport, TX — POSSIBLE October 1-3; 6-16; 20-29
Port Isabel, TX — POSSIBLE October 10, 11, 12

West Coast: Possible & Likely Flood Days

North Spit, CA — POSSIBLE October 8, 9, 10
South Beach, OR — POSSIBLE October 9
Toke Point, WA — POSSIBLE October 8, 9, 10

Hawaii: Possible & Likely Flood Days

Kauai:

Coastal flooding based primarily on tides is unlikely this month.

Oahu:

Coastal flooding based primarily on tides is unlikely this month.

Maui:

Kahului, Kahului Harbor, HI — POSSIBLE October 9

Hawaii, Big Island:

Kawaihae, HI — POSSIBLE October 9, 10
Hilo, Hilo Bay, Kuhio Bay, HI — POSSIBLE October 8, 9, 10

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

High tide in a salt marsh along the coast

Saltmarsh on the Virginia coast at sunset. Known as a coastal salt marsh or tidal marsh it is located between land and brackish water that is regularly flooded by the tides. Photo Shutterstock/Michael G McKinne

Flood Outlook