FZHW60 PHFO 232138 OFFHFO Offshore Waters Forecast for Hawaii National Weather Service Honolulu HI 1138 AM HST Sun Aug 23 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. PHZ105-240545- 1138 AM HST Sun Aug 23 2026 .Synopsis for the Hawaiian offshore waters... At 1100 AM HST Tropical Storm Moke was centered at 15.2N 156.3W moving W at 13 kt. TS Moke will start a weakening trend within the next 48 hours before becoming Post Tropical Remnant low Tuesday. MOKE FORECAST POSITIONS 800 PM HST SUNDAY 15.4N 158.3W 800 AM HST MONDAY 15.7N 160.9W 800 PM HST MONDAY 16.2N 163.5W 800 AM HST TUESDAY 16.8N 166.1W 800 PM HST TUESDAY 17.4N 168.8W $$ PHZ180-240545- Hawaiian Offshore Waters- 1138 AM HST Sun Aug 23 2026 ...TROPICAL STORM WARNING... .THIS AFTERNOON...TROPICAL STORM CONDITIONS S WATERS. Elsewhere, E winds 10 to 25 kt. Seas 6 to 13 ft, highest in S waters. Isolated thunderstorms S waters. .TONIGHT...TROPICAL STORM CONDITIONS EXPECTED S waters. Elsewhere, NE to E winds 15 to 25 kt. Seas 7 to 13 ft, highest S of 20N. Isolated thunderstorms S Waters. .MONDAY AND MONDAY NIGHT...E of 160E, E winds 20 to 25 kt. Elsewhere winds 15 to 20 kt. Seas 7 to 12 ft, highest W of 156W. Isolated thunderstorms S waters. .TUESDAY THROUGH THURSDAY...E winds 10 to 20 kt. Seas 5 to 7 ft. Isolated thunderstorms W of 156W Tuesday and Wednesday. $$