FZHW50 PHFO 211311 CWFHFO Coastal Waters Forecast National Weather Service Honolulu HI 311 AM HST Sat Feb 21 2026 Hawaiian coastal waters within 40 nautical miles including the Hawaiian Islands Humpback Whale National Marine Sanctuary. 311 AM HST Sat Feb 21 2026 .Synopsis for Hawaiian coastal waters... A surface ridge will gradually weaken over the weekend as a gale to the northwest lifts northward. An upper trough will linger over the area through the weekend, followed by a frontal boundary drifting southward across the smaller islands early next week.
Kauai Northwest Waters- 311 AM HST Sat Feb 21 2026
...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE THIS MORNING...
TODAY East southeast winds 10 to 15 knots, veering to southeast 7 to 10 knots this afternoon. Seas 7 to 10 feet, subsiding to 5 to 7 feet this afternoon. Wave Detail: East 7 feet at 9 seconds. Hazy. Isolated thunderstorms this morning. Scattered heavy showers.
TONIGHT East northeast winds 7 to 10 knots. Seas 4 to 5 feet. Wave Detail: East 5 feet at 9 seconds. Hazy. Scattered showers.
SUNDAY Winds variable less than 10 knots, becoming north 7 to 10 knots in the afternoon. Seas 3 to 4 feet. Wave Detail: East 4 feet at 9 seconds. Hazy. A chance of showers.
SUNDAY NIGHT Winds variable less than 10 knots. Seas 3 to 4 feet. Wave Detail: East 4 feet at 8 seconds. A chance of showers.
MONDAY East northeast winds 10 to 15 knots. Seas 5 to 7 feet, building to 9 to 12 feet in the afternoon. Wave Detail: North northeast 10 feet at 16 seconds, east 4 feet at 7 seconds and northwest 3 feet at 16 seconds. A chance of showers.
MONDAY NIGHT East northeast winds 15 to 20 knots. Seas 11 to 13 feet. Wave Detail: North northeast 11 feet at 15 seconds, east 5 feet at 7 seconds and northwest 3 feet at 15 seconds. A chance of showers, mainly in the evening.
TUESDAY East northeast winds 20 to 25 knots. Seas 9 to 13 feet. Wave Detail: North northeast 11 feet at 14 seconds, east 6 feet at 6 seconds and northwest 3 feet at 14 seconds. Isolated showers.
WEDNESDAY East northeast winds 20 to 25 knots. Seas 7 to 9 feet. Wave Detail: North northeast 7 feet at 12 seconds and east 6 feet at 6 seconds. Isolated showers in the morning. Isolated showers after midnight. Winds and seas higher in and near tstms.
Kauai Windward Waters- 311 AM HST Sat Feb 21 2026
...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE THIS MORNING...
TODAY East southeast winds to 15 knots, easing to 10 knots this afternoon. Seas to 10 feet, subsiding to 6 to 7 feet this afternoon. Wave Detail: East 7 feet at 9 seconds. Hazy. Heavy showers likely with isolated thunderstorms.
TONIGHT East winds 10 to 15 knots. Seas 4 to 6 feet. Wave Detail: East 6 feet at 9 seconds. Hazy. Scattered showers.
SUNDAY Winds variable less than 10 knots, becoming north 10 to 15 knots in the afternoon. Seas 3 to 5 feet. Wave Detail: East 4 feet at 9 seconds. Hazy. A chance of showers in the morning. Showers likely in the afternoon.
SUNDAY NIGHT Winds variable less than 10 knots. Seas 3 to 4 feet. Wave Detail: East 4 feet at 8 seconds. Showers likely.
MONDAY Northeast winds 7 to 10 knots, veering to east northeast 10 to 15 knots in the afternoon. Seas 5 to 8 feet, building to 9 to 12 feet in the afternoon. Wave Detail: North northeast 11 feet at 16 seconds, east 4 feet at 7 seconds and northwest 3 feet at 16 seconds. A chance of showers.
MONDAY NIGHT East northeast winds 15 to 20 knots. Seas 12 to 13 feet. Wave Detail: North northeast 12 feet at 15 seconds, east 4 feet at 7 seconds and northwest 3 feet at 15 seconds. A chance of showers.
TUESDAY East northeast winds 15 to 20 knots. Seas 9 to 12 feet. Wave Detail: North northeast 11 feet at 14 seconds, east 5 feet at 7 seconds and northwest 3 feet at 14 seconds. Scattered showers, mainly in the morning.
WEDNESDAY East northeast winds to 20 knots. Seas 8 to 9 feet. Wave Detail: North northeast 7 feet at 12 seconds and east 6 feet at 6 seconds. Isolated showers. Winds and seas higher in and near tstms.
Kauai Leeward Waters- 311 AM HST Sat Feb 21 2026
TODAY East winds 7 to 10 knots, veering to south southwest this afternoon. Seas to 6 feet, subsiding to 3 to 4 feet this afternoon. Wave Detail: East 4 feet at 9 seconds. Hazy. Isolated thunderstorms this morning. Scattered showers.
TONIGHT Winds variable less than 10 knots. Seas 3 to 4 feet. Wave Detail: East 3 feet at 6 seconds. Hazy. Scattered showers.
SUNDAY Winds variable less than 10 knots, becoming northwest 7 to 10 knots in the afternoon. Seas to 3 feet in the morning, then to 2 feet or less. Hazy. A chance of showers.
SUNDAY NIGHT Winds variable less than 10 knots. Seas to 2 feet or less. A slight chance of showers in the evening, then a chance of showers after midnight.
MONDAY East northeast winds 7 to 10 knots. Seas 4 to 6 feet, building to 6 to 9 feet in the afternoon. Wave Detail: North northeast 9 feet at 16 seconds and northwest 3 feet at 16 seconds. A chance of showers, mainly in the morning.
MONDAY NIGHT East northeast winds 7 to 10 knots, rising to 15 to 20 knots after midnight. Seas 8 to 11 feet. Wave Detail: North northeast 11 feet at 15 seconds, east northeast 4 feet at 6 seconds and northwest 3 feet at 15 seconds. A chance of showers.
TUESDAY East northeast winds 15 to 20 knots, rising to 20 to 25 knots. Seas 8 to 11 feet. Wave Detail: North northeast 10 feet at 14 seconds, east northeast 6 feet at 6 seconds and northwest 3 feet at 14 seconds. Scattered showers in the morning. Isolated showers.
WEDNESDAY East northeast winds 20 to 25 knots. Seas 6 to 9 feet. Wave Detail: East 7 feet at 7 seconds and north northeast 7 feet at 12 seconds. Isolated showers. Winds and seas higher in and near tstms.
Kauai Channel- 311 AM HST Sat Feb 21 2026
...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE THIS MORNING...
TODAY East winds 15 to 20 knots, becoming southwest 7 to 10 knots this afternoon. Seas 6 to 8 feet, subsiding to 4 to 6 feet this afternoon. Wave Detail: East northeast 5 feet at 8 seconds. Hazy. Heavy showers likely this morning. Isolated thunderstorms. Scattered showers this afternoon.
TONIGHT North northwest winds 7 to 10 knots. Seas 3 to 5 feet. Wave Detail: East northeast 4 feet at 7 seconds. Hazy. Scattered showers.
SUNDAY Winds variable less than 10 knots, becoming northwest 7 to 10 knots in the afternoon. Seas 3 to 4 feet. Wave Detail: East northeast 3 feet at 9 seconds. Hazy. A chance of showers.
SUNDAY NIGHT Winds variable less than 10 knots. Seas to 3 feet in the evening, then to 2 feet or less. Wave Detail: East northeast 3 feet at 8 seconds. A chance of showers.
MONDAY Winds variable less than 10 knots, becoming northeast to 10 knots in the afternoon. Seas 4 to 6 feet, building to 8 to 11 feet in the afternoon. Wave Detail: North northeast 10 feet at 16 seconds and east northeast 3 feet at 6 seconds. A chance of showers.
MONDAY NIGHT East northeast winds to 10 knots, rising to 15 to 20 knots after midnight. Seas 9 to 12 feet. Wave Detail: North northeast 11 feet at 15 seconds and east northeast 4 feet at 6 seconds. A chance of showers.
TUESDAY Northeast winds 15 to 20 knots, becoming east northeast 20 to 25 knots. Seas 9 to 12 feet. Wave Detail: North northeast 10 feet at 14 seconds and east northeast 6 feet at 6 seconds. Scattered showers through the night, then isolated showers through the day.
WEDNESDAY East northeast winds 20 to 25 knots. Seas 6 to 9 feet. Wave Detail: North northeast 7 feet at 12 seconds and east northeast 6 feet at 6 seconds. Isolated showers. Winds and seas higher in and near tstms.
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