National Weather Service Marine Forecast FZHW60 PHFO

FZHW60 PHFO 172120
OFFHFO

Offshore Waters Forecast for Hawaii
National Weather Service Honolulu HI
1120 AM HST Fri Apr 17 2026

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.

PHZ105-180430
1120 AM HST Fri Apr 17 2026

Synopsis for the Hawaiian offshore waters

A trough developing W of the NW waters late today will persist through the weekend and bring isolated to scattered thunderstorms to the NW waters. The trough becomes a weak low N of the islands by Monday, while high pressure remains in place to the NE.

PHZ180-180430
Hawaiian Offshore Waters
1120 AM HST Fri Apr 17 2026

THIS AFTERNOON
E winds 10 to 20 kt. Seas 4 to 6 ft. Isolated thunderstorms far W waters.

TONIGHT
E winds 15 to 25 kt. Seas 6 to 7 ft. Isolated thunderstorms.

SATURDAY AND SATURDAY NIGHT
SE half, E winds 10 to 20 kt. NW half, E to SE winds up to 15 kt. Seas 6 ft. Isolated thunderstorms, except scattered thunderstorms far W waters.

SUNDAY
NW waters, SE to S winds 10 to 20 kt. Elsewhere, E winds 10 to 20 kt. Seas 6 ft. Isolated thunderstorms NW Half.

MONDAY
SE half, SE winds 10 to 20 kt. NW half, S to SW winds up to 15 kt. Seas 6 ft. Isolated thunderstorms NW Half.

TUESDAY
E winds 10 to 15 kt S of 20N, S to SW up to 15 kt N of 20W. Seas 6 to 8 ft. Isolated thunderstorms far N waters.