FZHW50 PHFO 311300 CWFHFO Coastal Waters Forecast National Weather Service Honolulu HI 300 AM HST Fri Jul 31 2026 Hawaiian coastal waters within 40 nautical miles including the Hawaiian Islands Humpback Whale National Marine Sanctuary. 300 AM HST Fri Jul 31 2026 .Synopsis for Hawaiian coastal waters... Trades quickly strengthen today with near gales possible in the windiest zones. Trades then gradually weaken early next week.
Maui County Windward Waters- 300 AM HST Fri Jul 31 2026
...SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY AFTERNOON...
TODAY East winds 15 to 20 knots. Seas 6 to 7 feet. Wave Detail: East southeast 5 feet at 5 seconds and east 4 feet at 8 seconds. Scattered showers, mainly this morning.
TONIGHT East winds to 20 knots. Seas 6 to 7 feet. Wave Detail: East 6 feet at 8 seconds. Isolated showers.
FRIDAY East winds 20 to 25 knots. Seas 7 to 9 feet. Wave Detail: East 7 feet at 15 seconds. Isolated showers.
FRIDAY NIGHT East winds 20 to 25 knots. Seas 8 to 9 feet. Wave Detail: East 8 feet at 8 seconds and east 5 feet at 12 seconds. Isolated showers.
SATURDAY East winds 20 to 25 knots. Seas to 9 feet. Wave Detail: East 8 feet at 8 seconds. Isolated showers.
SATURDAY NIGHT East winds 20 to 25 knots. Seas to 9 feet. Wave Detail: East 8 feet at 8 seconds. Scattered showers.
SUNDAY East northeast winds 15 to 20 knots. Seas 6 to 9 feet. Wave Detail: East 7 feet at 14 seconds. Scattered showers in the morning, then isolated showers in the afternoon. Scattered showers through the day.
MONDAY East northeast winds to 15 knots. Seas to 6 feet. Wave Detail: East 5 feet at 12 seconds. Scattered showers in the morning, then isolated showers in the afternoon. Scattered showers through the day.
Maui County Leeward Waters- 300 AM HST Fri Jul 31 2026
...SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY AFTERNOON...
TODAY East winds 15 to 20 knots. Seas 5 to 8 feet. Wave Detail: East southeast 5 feet at 6 seconds and south southwest 4 feet at 13 seconds. Isolated showers.
TONIGHT East winds 15 to 20 knots. Seas 5 to 7 feet. Wave Detail: East southeast 5 feet at 6 seconds and south 4 feet at 12 seconds. Isolated showers after midnight.
FRIDAY East winds 20 to 25 knots. Seas 5 to 7 feet. Wave Detail: East 6 feet at 7 seconds and south 3 feet at 12 seconds.
FRIDAY NIGHT East northeast winds 20 to 25 knots. Seas 6 to 9 feet. Wave Detail: East 8 feet at 7 seconds and south 3 feet at 12 seconds.
SATURDAY East northeast winds 15 to 20 knots. Seas 4 to 6 feet. Wave Detail: East 6 feet at 6 seconds.
SATURDAY NIGHT East northeast winds 15 to 20 knots, easing to 10 to 15 knots after midnight. Seas 4 to 6 feet. Wave Detail: East 5 feet at 6 seconds.
SUNDAY East northeast winds 10 to 15 knots. Seas 3 to 5 feet. Wave Detail: East 4 feet at 5 seconds. Isolated showers after midnight.
MONDAY East northeast winds 7 to 10 knots, becoming 10 to 15 knots in the evening, then becoming 7 to 10 knots after midnight. Seas 3 to 4 feet. Wave Detail: East 3 feet at 4 seconds. Isolated showers through the day.
Maalaea Bay- 300 AM HST Fri Jul 31 2026
...SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY AFTERNOON...
TODAY North winds 20 to 25 knots. Seas 3 to 4 feet this morning, then to 2 feet or less.
TONIGHT North winds to 25 knots. Seas to 2 feet or less. Wave Detail: East 2 feet at 3 seconds.
FRIDAY North winds to 25 knots. Seas to 2 feet or less. Wave Detail: Northeast 2 feet at 3 seconds.
FRIDAY NIGHT North winds 25 to 30 knots. Seas 3 to 4 feet. Wave Detail: Northeast 4 feet at 4 seconds.
SATURDAY North northeast winds to 25 knots. Seas to 2 feet or less. Wave Detail: North northeast 2 feet at 4 seconds.
SATURDAY NIGHT North winds to 25 knots. Seas to 2 feet or less. Wave Detail: North northeast 2 feet at 3 seconds.
SUNDAY North winds to 25 knots, easing to 20 knots after midnight. Seas to 2 feet or less. Wave Detail: North northeast 2 feet at 3 seconds.
MONDAY North winds to 20 knots, easing to 15 knots after midnight. Seas to 2 feet or less.
Pailolo Channel- 300 AM HST Fri Jul 31 2026
...SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY AFTERNOON...
TODAY East northeast winds 20 to 25 knots. Seas 5 to 7 feet. Wave Detail: East 4 feet at 5 seconds. Isolated showers.
TONIGHT East northeast winds 20 to 25 knots. Seas 4 to 6 feet. Wave Detail: East 5 feet at 5 seconds. Isolated showers after midnight.
FRIDAY East northeast winds 25 to 30 knots. Seas 5 to 7 feet. Wave Detail: East 6 feet at 5 seconds. Isolated showers.
FRIDAY NIGHT East northeast winds 25 to 30 knots. Seas 5 to 8 feet. Wave Detail: East 7 feet at 5 seconds. Isolated showers.
SATURDAY East northeast winds 20 to 25 knots. Seas 5 to 7 feet. Wave Detail: East 5 feet at 5 seconds. Isolated showers.
SATURDAY NIGHT East northeast winds 20 to 25 knots. Seas 5 to 7 feet. Wave Detail: East 5 feet at 7 seconds. Isolated showers.
SUNDAY East northeast winds 20 to 25 knots, easing to 15 to 20 knots after midnight. Seas 4 to 6 feet. Wave Detail: East 4 feet at 7 seconds. Isolated showers.
MONDAY East northeast winds 15 to 20 knots, easing to 10 to 15 knots after midnight. Seas 3 to 5 feet. Wave Detail: East 3 feet at 12 seconds. Isolated showers. Scattered showers after midnight.
Alenuihaha Channel- 300 AM HST Fri Jul 31 2026
...SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY AFTERNOON...
TODAY East northeast winds 20 to 25 knots. Seas 6 to 8 feet. Wave Detail: East 6 feet at 7 seconds and south southwest 4 feet at 13 seconds. Isolated showers.
TONIGHT East northeast winds 20 to 25 knots. Seas 6 to 9 feet. Wave Detail: East 7 feet at 6 seconds, south southwest 4 feet at 12 seconds and east 4 feet at 16 seconds. Isolated showers.
FRIDAY East northeast winds 25 to 30 knots. Seas 8 to 10 feet. Wave Detail: East 9 feet at 7 seconds, east 4 feet at 15 seconds and south southwest 3 feet at 12 seconds. Isolated showers.
FRIDAY NIGHT East northeast winds 25 to 30 knots. Seas 8 to 11 feet. Wave Detail: East 10 feet at 7 seconds, east 4 feet at 14 seconds and south southwest 3 feet at 12 seconds. Scattered showers.
SATURDAY East northeast winds 20 to 25 knots. Seas 7 to 9 feet. Wave Detail: East 8 feet at 8 seconds. Scattered showers.
SATURDAY NIGHT East northeast winds 20 to 25 knots. Seas 7 to 9 feet. Wave Detail: East 8 feet at 8 seconds. Scattered showers.
SUNDAY East northeast winds 20 to 25 knots, easing to 15 to 20 knots after midnight. Seas 5 to 7 feet. Wave Detail: East 6 feet at 10 seconds and east 4 feet at 14 seconds. Isolated showers.
MONDAY East northeast winds 15 to 20 knots, easing to 10 to 15 knots after midnight. Seas 4 to 6 feet. Wave Detail: East 4 feet at 12 seconds. Isolated showers.
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