FPHW60 PHFO 220138 SFPHFO State Forecast for Hawaii National Weather Service Honolulu HI 338 PM HST Sat Mar 21 2026 HIZ001-003-004-006-007-009>011-015>018-022-029>050-221615- Kauai-Oahu-Maui-Molokai-Lanai- 338 PM HST Sat Mar 21 2026 ...FLOOD WATCH FOR NIIHAU KAUAI NORTH KAUAI MOUNTAINS OAHU MOLOKAI LANAI KAHOOLAWE AND MAUI... ...HIGH SURF ADVISORY FOR NIIHAU KAUAI AND OAHU... .TONIGHT...Cloudy. Scattered showers and slight chance of thunderstorms on Kauai. occasional showers and slight chance of thunderstorms Oahu and Maui County. Locally heavy rainfall possible. Lows 66 to 71. Southwest winds around 15 mph in the evening becoming light and variable. .SUNDAY...Cloudy. Isolated showers on Kauai. occasional showers and slight chance of thunderstorms Oahu and Maui County. Locally heavy rainfall possible. Highs 77 to 82. Variable winds to 15 mph. .SUNDAY NIGHT...Cloudy. Oahu and Maui County, showers likely in the evening. Slight chance of thunderstorms through the night. Scattered showers after midnight. Locally heavy rainfall possible. Lows 65 to 70. Variable winds to 15 mph becoming north around 15 mph after midnight. .MONDAY...Mostly cloudy. Windward and mountains, scattered showers. Leeward, scattered showers during the day. Isolated showers at night. Highs 76 to 81. Lows 64 to 69. Northeast winds around 15 mph. .TUESDAY...Partly cloudy. Isolated showers windward and mountains. Highs 75 to 80. Lows 64 to 69. Northeast winds 15 to 20 mph. .WEDNESDAY...Partly cloudy. Isolated showers windward and mountains. Highs 76 to 81. Lows 65 to 70. Northeast winds 15 to 20 mph. .THURSDAY...Partly cloudy. Isolated showers windward and mountains. Highs 76 to 81. Lows 64 to 69. Northeast winds 15 to 20 mph. $$ HIZ023-026>028-051>054-221615- Big Island of Hawaii- 338 PM HST Sat Mar 21 2026 ...FLOOD WATCH FOR THE LOWER ELEVATIONS... ...WINTER STORM WARNING FROM 6 PM THIS EVENING TO 6 PM HST SUNDAY FOR BIG ISLAND SUMMITS... .TONIGHT...Cloudy. Scattered showers and slight chance of thunderstorms. Locally heavy rainfall possible. Lows 69 to 74. Variable winds to 15 mph. .SUNDAY...Occasional showers and slight chance of thunderstorms. Locally heavy rainfall possible. Highs 78 to 83. Variable winds to 15 mph. .SUNDAY NIGHT...Cloudy. Windward, occasional showers and slight chance of thunderstorms. Leeward, showers likely in the evening. Slight chance of thunderstorms through the night. Scattered showers after midnight. Locally heavy rainfall possible. Lows 67 to 72. Variable winds to 15 mph. .MONDAY...Mostly cloudy. Windward, occasional showers during the day, then scattered showers at night. Leeward, scattered showers during the day, then isolated showers at night. Highs 77 to 82. Lows 66 to 71. Variable winds to 15 mph. .TUESDAY...Partly cloudy. Scattered showers windward. Highs 78 to 83. Lows 66 to 71. Northeast winds around 15 mph. .WEDNESDAY...Partly cloudy. Scattered showers windward. Highs 78 to 83. Lows 66 to 71. North winds 15 to 20 mph. .THURSDAY...Mostly cloudy. Scattered showers windward. Highs 78 to 83. Lows 66 to 71. Northeast winds around 15 mph. $$