FZHW50 PHFO 110136 CWFHFO Coastal Waters Forecast National Weather Service Honolulu HI 336 PM HST Mon Aug 10 2026 Hawaiian coastal waters within 40 nautical miles including the Hawaiian Islands Humpback Whale National Marine Sanctuary. 336 PM HST Mon Aug 10 2026 .Synopsis for Hawaiian coastal waters... High pressure to the far northeast will remain nearly stationary through midweek. Latest guidance from the National Hurricane Center has a medium chance in 2 days and a high chance in 7 days for a tropical cyclone to form southeast of the islands. Depending on the track, it will have differing effects on local winds, seas and weather as early as Thursday.
Big Island Windward Waters- 336 PM HST Mon Aug 10 2026
TONIGHT East northeast winds 15 to 20 knots. Seas 3 to 5 feet. Wave Detail: North northeast 3 feet at 4 seconds. Isolated showers.
TUESDAY East northeast winds 15 to 20 knots. Seas 3 to 5 feet. Wave Detail: North northeast 3 feet at 4 seconds and south southwest 3 feet at 14 seconds. Isolated showers in the morning.
TUESDAY NIGHT East northeast winds 10 to 15 knots. Seas 3 to 5 feet. Wave Detail: South southwest 4 feet at 13 seconds and north northeast 3 feet at 4 seconds. Isolated showers.
WEDNESDAY East northeast winds 10 to 15 knots, rising to 15 to 20 knots in the afternoon. Seas 4 to 6 feet. Wave Detail: North northeast 4 feet at 5 seconds and south southwest 4 feet at 18 seconds. Isolated showers.
WEDNESDAY NIGHT Northeast winds 15 to 20 knots. Seas 4 to 6 feet. Wave Detail: North northeast 4 feet at 5 seconds and south 4 feet at 17 seconds. Scattered showers.
THURSDAY Northeast winds 15 to 20 knots. Seas 5 to 7 feet. Wave Detail: North northeast 5 feet at 6 seconds and south 4 feet at 16 seconds. Scattered showers, mainly in the morning.
THURSDAY NIGHT Northeast winds 15 to 20 knots. Seas 5 to 8 feet. Wave Detail: North northeast 5 feet at 6 seconds, east southeast 4 feet at 9 seconds and south 4 feet at 15 seconds. Scattered showers.
FRIDAY North northeast winds 15 to 20 knots. Seas 9 to 12 feet. Wave Detail: Northeast 11 feet at 7 seconds, east 8 feet at 12 seconds and south 4 feet at 14 seconds. Scattered showers through the night, then numerous showers through the day.
SATURDAY North winds 15 to 20 knots, becoming northwest 20 to 25 knots in the evening, then becoming west 25 to 30 knots after midnight. Seas 9 to 12 feet. Wave Detail: East 9 feet at 13 seconds, east 7 feet at 5 seconds and south 4 feet at 13 seconds. Scattered showers in the morning, then showers.
Big Island Leeward Waters- 336 PM HST Mon Aug 10 2026
...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY AFTERNOON...
TONIGHT North northwest winds 7 to 10 knots west of the Big Island...East 20 to 25 knots near South Point. Seas 4 to 6 feet. Wave Detail: East northeast 5 feet at 6 seconds. Isolated showers.
TUESDAY West of the Big Island, southeast winds 7 to 10 knots, veering to west 10 to 15 knots in the afternoon. Near South Point, east winds 20 to 25 knots. Seas 4 to 6 feet. Wave Detail: Northeast 4 feet at 6 seconds and south southwest 3 feet at 14 seconds. Isolated showers.
TUESDAY NIGHT West of the Big Island, south winds 7 to 10 knots in the evening, becoming variable less than 10 knots. Near South Point, east winds 15 to 20 knots. Seas 4 to 6 feet. Wave Detail: Northeast 4 feet at 5 seconds and south southwest 4 feet at 13 seconds. Isolated showers.
WEDNESDAY West of the Big Island, northwest winds 7 to 10 knots in the morning, becoming variable less than 10 knots. Near Kawaihae, east northeast winds 10 to 15 knots. Seas 4 to 6 feet. Wave Detail: Northeast 4 feet at 5 seconds and south southwest 4 feet at 18 seconds. Isolated showers in the morning.
WEDNESDAY NIGHT Winds variable less than 10 knots west of the Big Island...East northeast 10 to 15 knots near South Point. Seas 5 to 7 feet. Wave Detail: Northeast 4 feet at 6 seconds and south southwest 4 feet at 17 seconds. Isolated showers.
THURSDAY West of the Big Island, winds variable less than 10 knots, becoming southeast 7 to 10 knots in the afternoon. Near Kawaihae, northeast winds to 15 knots, rising to 20 knots in the afternoon. Seas 5 to 8 feet. Wave Detail: Northeast 5 feet at 7 seconds and south southwest 4 feet at 16 seconds.
THURSDAY NIGHT West of the Big Island, northwest winds 7 to 10 knots. Near South Point, east northeast winds 15 to 20 knots, becoming north northwest 7 to 10 knots after midnight. Seas 5 to 8 feet. Wave Detail: Northeast 5 feet at 7 seconds and south southwest 4 feet at 15 seconds. Scattered showers after midnight.
FRIDAY West of the Big Island, southeast winds 7 to 10 knots, becoming variable less than 10 knots, then becoming north 7 to 10 knots after midnight. Near South Point, winds variable less than 10 knots, becoming east 7 to 10 knots in the afternoon, backing to northeast in the evening, backing to west northwest after midnight. Seas 6 to 9 feet. Wave Detail: North northeast 8 feet at 9 seconds and south southwest 4 feet at 14 seconds. Isolated showers through the night, then scattered showers through the day.
SATURDAY West of the Big Island, north winds 7 to 10 knots, rising to 15 to 20 knots in the afternoon and evening, then becoming north northwest 10 to 15 knots after midnight. Near South Point, west northwest winds to 10 knots, veering to north 7 to 10 knots in the evening, then becoming west northwest to 15 knots after midnight. Seas 6 to 9 feet. Wave Detail: East southeast 7 feet at 6 seconds and south 4 feet at 13 seconds. Scattered showers, then numerous showers after midnight.
Big Island Southeast Waters- 336 PM HST Mon Aug 10 2026
...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY AFTERNOON...
TONIGHT East northeast winds 20 to 25 knots. Seas to 6 feet. Wave Detail: Northeast 5 feet at 5 seconds. Isolated showers.
TUESDAY East northeast winds 15 to 20 knots. Seas to 6 feet. Wave Detail: Northeast 5 feet at 5 seconds and south southwest 3 feet at 14 seconds.
TUESDAY NIGHT East northeast winds 15 to 20 knots. Seas 6 to 7 feet. Wave Detail: Northeast 5 feet at 5 seconds and south southwest 4 feet at 13 seconds. Isolated showers.
WEDNESDAY East northeast winds 15 to 20 knots. Seas 6 to 8 feet. Wave Detail: East northeast 6 feet at 6 seconds and south southwest 4 feet at 18 seconds. Isolated showers.
WEDNESDAY NIGHT East northeast winds to 20 knots. Seas 6 to 9 feet. Wave Detail: Northeast 7 feet at 6 seconds and south 4 feet at 17 seconds. Isolated showers in the evening, then scattered showers after midnight.
THURSDAY Northeast winds 20 to 25 knots. Seas 7 to 9 feet. Wave Detail: Northeast 8 feet at 7 seconds and south 4 feet at 16 seconds. Isolated showers.
THURSDAY NIGHT Northeast winds 20 to 25 knots. Seas 8 to 10 feet. Wave Detail: Northeast 8 feet at 7 seconds, east southeast 4 feet at 9 seconds and south 4 feet at 15 seconds. Isolated showers in the evening, then scattered showers after midnight.
FRIDAY Northeast winds 15 to 20 knots, backing to north northwest after midnight. Seas 8 to 11 feet. Wave Detail: Northeast 10 feet at 8 seconds, east 7 feet at 12 seconds and south 4 feet at 14 seconds. Numerous showers through the night, then scattered showers in the evening. Numerous showers after midnight.
SATURDAY West northwest winds 10 to 15 knots, becoming west 15 to 20 knots in the afternoon, then becoming west southwest 10 to 15 knots in the evening, rising to 15 to 20 knots after midnight. Seas 8 to 11 feet. Wave Detail: East 7 feet at 13 seconds, east southeast 4 feet at 5 seconds and south 4 feet at 13 seconds. Scattered showers in the morning, then numerous showers.
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