The Offshore Waters Forecast for Hawai`i.

Offshore Forecast Issued: 08/20/2026 01:27:00 AM UTC
                        
638
FZHW60 PHFO 191527
OFFHFO

Offshore Waters Forecast for Hawaii
National Weather Service Honolulu HI
527 AM HST Wed Aug 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.

PHZ105-192315-
527 AM HST Wed Aug 19 2026

.Synopsis for the Hawaiian offshore waters...
High pressure far NE of the waters will weaken over the next few
days. It will then drift southward closer to the islands this
weekend, and trades will increase once again. Heading into  the
weekend, the potential development of a tropical system
southeast of the islands is possible but uncertainty remains as
the system has yet to develop.

$$

PHZ180-192315-
Hawaiian Offshore Waters-
527 AM HST Wed Aug 19 2026

.TODAY...E winds 10 to 15 kt. Seas 5 TO 87
.TONIGHT THROUGH FRIDAY...E winds 10 to 15 kt. Seas 6 to 8 ft.
.SATURDAY...E winds 15 to 25 kt. Seas 6 to 11 ft. Isolated
thunderstorms SE Waters.
.SUNDAY...E winds 20 to 30 kt E of 160W, E 10 to 20 kt W of 160W.
Seas 6 to 13 ft. Isolated thunderstorms SE Waters.

$$