Offshore Forecast
Issued by NWS Honolulu, HI
Issued by NWS Honolulu, HI
180 FZHW60 PHFO 170321 OFFHFO Offshore Waters Forecast for Hawaii National Weather Service Honolulu HI 521 PM HST Sun Nov 16 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. PHZ105-171030- 521 PM HST Sun Nov 16 2025 .Synopsis for the Hawaiian offshore waters... A high pressure ridge N of the Hawaiian Islands will drift E in response to an approaching cold front far NW of the state. A surface trough will form over the Hawaiian region by Monday, ahead of the cold front. Gale-force winds are forecast NW of the cold frontal boundary. Another high pressure ridge will build N of the area mid week. E Isolated thunderstorms are possible due to unstable conditions through much of the forecast period. $$ PHZ180-171030- Hawaiian Offshore Waters- 521 PM HST Sun Nov 16 2025 .TONIGHT AND MONDAY...E winds 10 to 20 kt. Seas 5 to 7 ft. Isolated thunderstorms SE Waters. .MONDAY NIGHT...Cold front approaching NW waters. NW half, E winds 5 to 15 kt. SE half, ESE winds 10 to 20 kt. Seas 5 to 7 ft. Isolated thunderstorms SE waters. .TUESDAY...Cold front entering NW waters. NE to E winds 10 to 20 kt SE of front. NE to E winds 20 to 30 kt NW of front. Seas 6 to 9 ft, highest NW waters. Isolated thunderstorms NW and SE waters. .WEDNESDAY...N waters, E winds 20 to 30 kt. S waters, E winds 10 to 20 kt. Seas 8 to 12 ft, highest NW waters. Isolated thunderstorms E of 160W. .THURSDAY...E winds 15 to 25 kt. Seas 9 to 12 ft. .FRIDAY...E winds 15 to 25 kt. Seas 8 to 10 ft. $$