FZHW60 PHFO 042141 OFFHFO Offshore Waters Forecast for Hawaii National Weather Service Honolulu HI 1141 AM HST Mon May 4 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. PHZ105-050430- 1141 AM HST Mon May 4 2026 .Synopsis for the Hawaiian offshore waters... A trough entering the NW waters on Tuesday will cause a weakening and veering of winds N of 20N through Wednesday. Weak ridging N of the islands will bring a return of NE to E winds for the latter half of the week. $$ PHZ180-050430- Hawaiian Offshore Waters- 1141 AM HST Mon May 4 2026 .THIS AFTERNOON...NE to E winds 10 to 20 kt, strongest S of 19N. Seas 6 to 8 ft. .TONIGHT...N of 23N, E to SE winds up to 10 kt. S of 23N, E winds 10 to 20 kt, strongest S of 19N. Seas 6 to 8 ft, highest S of 19N. .TUESDAY...NW waters, variable winds up to 10 kt. SE waters, E to SE winds 10 to 15 kt, strongest S of 19N. Seas 5 to 8 ft, highest S of 19N. .TUESDAY NIGHT...N of 21N W of 156W, NW to N winds up to 15 kt. N of 21N E of 156W, S to SE winds 10 to 15 kt. S of 21N, E winds 10 to 15 kt. Seas 5 to 7 ft. .WEDNESDAY...N of 21N W of 156W, N to NE winds 10 kt. N of 21N E of 156W, S to SE winds 10 to 15 kt. S of 21N, E winds 10 to 15 kt. Seas 6 to 7 ft. .THURSDAY AND FRIDAY...NE to E winds 5 to 15 kt, strongest S of 20N. Seas 6 to 9 ft. $$