The Offshore Waters Forecast for Hawai`i.

Offshore Forecast Issued: 04/20/2026 01:21:00 AM UTC
                        
110
FZHW60 PHFO 191521
OFFHFO

Offshore Waters Forecast for Hawaii
National Weather Service Honolulu HI
521 AM HST Sun Apr 19 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.

PHZ105-192345-
521 AM HST Sun Apr 19 2026

.Synopsis for the Hawaiian offshore waters...
A trough NW of the offshore waters and high pressure to the N
will persist through the weekend and bring isolated to scattered
thunderstorms. The trough becomes a weak low NW of the islands by
Monday with decreasing wind speed trends. Easterly trade winds
return from Thursday onward.

$$

PHZ180-192345-
Hawaiian Offshore Waters-
521 AM HST Sun Apr 19 2026

.TODAY...NW waters, SE to S winds 5 to 10 kt. SE waters, E to SE
winds 10 to 20 kt. Seas 4 to 6 ft. Isolated thunderstorms NW Half.
.TONIGHT...NW waters, SE to S winds 5 to 10 kt. SE waters, E to
SE winds 10 to 20 kt. Seas 4 to 6 ft. Isolated thunderstorms NW
Half.
.MONDAY THROUGH TUESDAY...NW waters, variable winds up to 10 kt.
SE waters, E to SE winds 10 to 15 kt. Seas 4 to 6 ft. Isolated
thunderstorms NW Half.
.WEDNESDAY AND THURSDAY...NE to E winds 10 to 20 kt. Seas 6 to 8
ft.

$$