Offshore Forecast
Issued by NWS Honolulu, HI
Issued by NWS Honolulu, HI
640 FZHW60 PHFO 201534 OFFHFO Offshore Waters Forecast for Hawaii National Weather Service Honolulu HI 534 AM HST Thu Nov 20 2025 Hawaiian offshore waters beyond 40 nautical miles out to 240 nautical miles including the portion of the Papahanaumokuakea Marine National Monument east of French Frigate Shoals Seas given as significant wave height, which is the average height of the highest 1/3 of the waves. Individual waves may be more than twice the significant wave height. PHZ105-202230- 534 AM HST Thu Nov 20 2025 .Synopsis for the Hawaiian offshore waters... Strong surface high pressure far NNE of the offshore waters will help generate fresh to strong easterly winds through Friday. This high will track E and weaken this weekend, allowing these winds to ease. Isolated thunderstorms possible for SW waters today and tonight. $$ PHZ180-202230- Hawaiian Offshore Waters- 534 AM HST Thu Nov 20 2025 .TODAY AND TONIGHT...E winds 15 to 25 kt. Seas 9 to 11 ft. Isolated thunderstorms SW Half. .FRIDAY...E winds 15 to 25 kt. Seas 8 to 10 ft. .FRIDAY NIGHT AND SATURDAY...E winds 10 to 20 kt. Seas 8 to 10 ft. .SUNDAY...E winds 10 to 20 kt. Seas 7 to 9 ft. .MONDAY...SE winds 10 to 15 kt N of 24N, E 15 to 25 kt elsewhere. Seas 6 to 8 ft. $$