The Offshore Waters Forecast for Hawai`i.

Offshore Forecast Issued: 09/20/2026 01:11:00 AM UTC
                        
522
FZHW60 PHFO 191511
OFFHFO

Offshore Waters Forecast for Hawaii
National Weather Service Honolulu HI
511 AM HST Sat Sep 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.

PHZ105-200030-
511 AM HST Sat Sep 19 2026

.Synopsis for the Hawaiian offshore waters...
Lingering moisture associated with a trough could bring isolated
thunderstorms to the SW waters through the weekend. Another trough
will approach the area from the E during the first half of next
week and could bring additional thunder. Fresh to strong trade
winds will continue through the forecast period.

$$

PHZ180-200030-
Hawaiian Offshore Waters-
511 AM HST Sat Sep 19 2026

.TODAY...E winds 15 to 25 kt. Seas 7 to 9 ft. Isolated
thunderstorms S of 18N.
.TONIGHT...E winds 15 to 25 kt. Seas 7 to 9 ft. Isolated
thunderstorms S of 20N.
.SUNDAY THROUGH SUNDAY NIGHT...E winds 15 to 25 kt. Seas 7 to 9
ft. Isolated thunderstorms S of 20N.
.MONDAY...E winds 15 to 25 kt. Seas 7 to 9 ft.
.TUESDAY...E winds 15 to 25 kt. Seas 6 to 12 ft, with highest
seas in SE waters. Isolated thunderstorms SE Waters.
.WEDNESDAY...E winds 15 to 25 kt. Seas 6 to 10 ft, with highest
seas in SE waters. Isolated thunderstorms SE Waters.

$$