Offshore Forecast
Issued by NWS
Issued by NWS
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789 FZHW61 PHFO 211530 OFFN10 NAVTEX MARINE FORECAST FOR HAWAIIAN WATERS NATIONAL WEATHER SERVICE HONOLULU HI 530 AM HST FRI AUG 21 2026 ...Please refer to Coastal Waters Forecasts available through NOAA Weather Radio and other means for detailed coastal forecasts... .Synopsis...A weak trough will continue to move NW across the N offshore waters through today before exiting the area. At 1500 UTC, Tropical Depression Two-C was located at 13.4N 146.0W, moving WNW at 9 kt. Two-C is expected to strengthen to a tropical storm and track through the S offshore waters this weekend. $$ Hawaiian waters within 40 nautical miles including the channels- .TODAY...East southeast winds 7 to 10 knots to Kauai...east 15 to 20 knots elsewhere. Seas 4 to 6 feet. Wave Detail: East 4 feet at 6 seconds. Isolated showers. .TONIGHT...East winds 15 to 20 knots. Seas 5 to 7 feet. Wave Detail: East 5 feet at 7 seconds. Isolated showers. .SATURDAY...East northeast winds 20 to 25 knots. Seas 7 to 10 feet. Wave Detail: East 7 feet at 7 seconds and west northwest 3 feet at 12 seconds. Isolated showers. .SATURDAY NIGHT...East northeast winds 25 to 30 knots. Seas 9 to 12 feet. Wave Detail: East 8 feet at 8 seconds, southeast 3 feet at 10 seconds and west northwest 3 feet at 11 seconds. Scattered showers. .SUNDAY...East northeast winds 25 to 30 knots. Seas 9 to 13 feet. Scattered showers. .SUNDAY NIGHT...East northeast winds 25 to 30 knots. Seas 9 to 13 feet. Scattered showers. .MONDAY...East northeast winds 20 to 25 knots, becoming east 15 to 20 knots. Seas 9 to 13 feet. Scattered showers. .TUESDAY...East winds 15 to 20 knots. Seas 6 to 9 feet, subsiding to 5 to 6 feet. Scattered showers. $$ Hawaiian Offshore Waters- ...TROPICAL STORM CONDITIONS POSSIBLE SATURDAY NIGHT INTO SUNDAY... .TODAY...NW half, variable winds 5 to 15 kt. SE half, E to SE winds 10 to 15 kt. Seas 5 to 7 ft. .TONIGHT...N of 22N, E to SE winds 5 to 15 kt. Elsewhere, E winds 10 to 20 kt. Seas 6 to 9 ft. .SATURDAY...NW half, E winds 10 to 20 kt. SE half, E winds 20 to 30 kt. Seas 6 to 9 ft, building to 6 to 11 ft in the afternoon. Isolated thunderstorms SE Waters. .SATURDAY NIGHT...Tropical storm conditions possible over SE waters. Elsewhere, E winds 15 to 25 kt. Seas 6 to 15 ft. Isolated thunderstorms SE Waters. .SUNDAY...Tropical storm conditions possible S of 19N, W of 152W. Elsewhere, E winds 15 to 25 kt. Seas 7 to 15 ft. Isolated thunderstorms SE Waters. .MONDAY...E winds 10 to 20 kt N of 20N, E 20 to 30 kt elsewhere. Seas 6 to 10 ft. Isolated thunderstorms S of 24N. .TUESDAY...E winds 10 to 20 kt. Seas 5 to 8 ft. Isolated thunderstorms S of 23N. $$