FZHW60 PHFO 220331
OFFHFO

Offshore Waters Forecast for Hawaii
National Weather Service Honolulu HI
531 PM HST Fri Aug 21 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.

PHZ105-221030-
531 PM HST Fri Aug 21 2026

.Synopsis for the Hawaiian offshore waters...
A weak trough will continue to move NW across the N offshore 
waters tonight. At 0300 UTC, Tropical Storm Moke was located at 
14.0N 148.3W, moving WNW at 10 kt. Tropical Storm Moke is 
expected to track through the S offshore waters this weekend. 

MOKE FORECAST POSITIONS
200 AM HST SATURDAY  14.5N 149.9W
200 PM HST SATURDAY  15.2N 151.6W
200 AM HST SUNDAY    15.8N 153.9W
200 PM HST SUNDAY    16.2N 156.6W
200 AM HST MONDAY    16.6N 159.0W
200 PM HST MONDAY    17.0N 161.7W
200 PM HST TUESDAY   18.2N 166.3W
200 PM HST WEDNESDAY 18.6N 171.5W
200 PM HST THURSDAY  18.6N 176.3W
200 PM HST FRIDAY    19.6N 179.3W

$$

PHZ180-221030-
Hawaiian Offshore Waters-
531 PM HST Fri Aug 21 2026

...TROPICAL STORM WARNING IN EFFECT...

.TONIGHT...E winds 15 to 25 kt E of 160W, E 10 to 15 kt W of
160W. Seas 6 to 9 ft. 
.SATURDAY...E winds 10 to 20 kt NW Half, NE 20 to 30 kt SE Half.
Seas 6 to 9 ft, building to 6 to 11 ft in the afternoon. Isolated
thunderstorms SE Waters. 
.SATURDAY NIGHT...NW Half, E winds 15 to 25 kt. SE Half, NE winds
20 to 30 kt, becoming E 40 to 50 kt in the late evening and
overnight. Seas 6 to 12 ft. Isolated thunderstorms SE Waters. 
.SUNDAY...E winds 10 to 20 kt NW Half, E 35 to 45 kt SE Half.
Seas 7 to 12 ft. Isolated thunderstorms SE Waters. 
.SUNDAY NIGHT...E winds 15 to 25 kt NW Half, E 35 to 45 kt SE
Half. Seas 7 to 10 ft. Isolated thunderstorms SE Waters. 
.MONDAY THROUGH WEDNESDAYU...E winds 10 to 20 kt N of 20N, E 25 
to 35 kt elsewhere. Seas 6 to 9 ft. Isolated thunderstorms S of 
24N Monday.

$$