FZHW50 PHFO 201321 CWFHFO Coastal Waters Forecast National Weather Service Honolulu HI 321 AM HST Fri Feb 20 2026 Hawaiian coastal waters within 40 nautical miles including the Hawaiian Islands Humpback Whale National Marine Sanctuary. 321 AM HST Fri Feb 20 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 move into the area over the weekend, followed by a frontal boundary drifting southward across the smaller islands early next week.
Kauai Northwest Waters- 321 AM HST Fri Feb 20 2026
...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE THIS AFTERNOON...
TODAY East southeast winds 20 to 25 knots. Seas 7 to 10 feet. Wave Detail: East 9 feet at 9 seconds. Scattered heavy showers this morning. Isolated thunderstorms. Numerous heavy showers this afternoon.
TONIGHT East southeast winds 15 to 20 knots. Seas 6 to 9 feet. Wave Detail: East 9 feet at 9 seconds. Numerous heavy showers with isolated thunderstorms.
SATURDAY Southeast winds 10 to 15 knots, backing to east northeast 7 to 10 knots in the afternoon. Seas 5 to 7 feet. Wave Detail: East 7 feet at 8 seconds. Numerous heavy showers with isolated thunderstorms.
SATURDAY NIGHT Winds variable less than 10 knots. Seas 3 to 5 feet. Wave Detail: East 5 feet at 9 seconds. Numerous showers with isolated thunderstorms.
SUNDAY Winds variable less than 10 knots, becoming west northwest 7 to 10 knots in the afternoon. Seas 3 to 4 feet. Wave Detail: East 4 feet at 9 seconds. Numerous showers.
SUNDAY NIGHT West northwest winds 7 to 10 knots, veering to east southeast after midnight. Seas 3 to 4 feet, building to 4 to 6 feet after midnight. Wave Detail: East 6 feet at 8 seconds. Numerous showers with isolated thunderstorms in the evening, then scattered showers after midnight.
MONDAY East northeast winds 20 to 25 knots. Seas 7 to 8 feet. Wave Detail: North northeast 8 feet at 17 seconds, east 7 feet at 7 seconds and northwest 3 feet at 17 seconds. Scattered showers .
TUESDAY East northeast winds to 20 knots. Seas 8 to 11 feet. Wave Detail: North northeast 11 feet at 14 seconds, east 6 feet at 7 seconds and northwest 3 feet at 14 seconds. Isolated showers. Winds and seas higher in and near tstms.
Kauai Windward Waters- 321 AM HST Fri Feb 20 2026
...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE THIS AFTERNOON...
TODAY East southeast winds 20 to 25 knots. Seas to 10 feet. Wave Detail: East 9 feet at 9 seconds. Numerous heavy showers with isolated thunderstorms.
TONIGHT East southeast winds 20 to 25 knots. Seas 8 to 9 feet. Wave Detail: East 9 feet at 9 seconds. Heavy showers with isolated thunderstorms.
SATURDAY East southeast winds 10 to 15 knots. Seas 7 to 8 feet, subsiding to 5 to 6 feet in the afternoon. Wave Detail: East 8 feet at 8 seconds. Heavy showers with isolated thunderstorms.
SATURDAY NIGHT Winds variable less than 10 knots. Seas 4 to 5 feet. Wave Detail: East 5 feet at 9 seconds. Isolated thunderstorms in the evening. Numerous heavy showers.
SUNDAY Winds variable less than 10 knots, becoming west to 10 knots in the afternoon. Seas 3 to 4 feet. Wave Detail: East 4 feet at 9 seconds. Numerous showers.
SUNDAY NIGHT Winds variable less than 10 knots, becoming southeast 7 to 10 knots after midnight. Seas to 3 feet, building to 4 to 6 feet after midnight. Wave Detail: East 6 feet at 8 seconds. Isolated thunderstorms in the evening. Numerous showers.
MONDAY East northeast winds 20 to 25 knots. Seas 7 to 8 feet. Wave Detail: North northeast 8 feet at 15 seconds, east 7 feet at 7 seconds and northwest 3 feet at 17 seconds. Scattered showers.
TUESDAY East northeast winds 15 to 20 knots. Seas 8 to 11 feet. Wave Detail: North northeast 11 feet at 14 seconds, east southeast 6 feet at 7 seconds and northwest 3 feet at 14 seconds. Scattered showers, mainly in the morning. Winds and seas higher in and near tstms.
Kauai Leeward Waters- 321 AM HST Fri Feb 20 2026
TODAY East southeast winds 15 to 20 knots, becoming east 10 to 15 knots this afternoon. Seas 6 to 8 feet. Wave Detail: East 7 feet at 8 seconds. Scattered heavy showers this morning. Isolated thunderstorms. Numerous heavy showers this afternoon.
TONIGHT East southeast winds 10 to 15 knots. Seas 5 to 7 feet, subsiding to 4 to 5 feet after midnight. Wave Detail: East 7 feet at 8 seconds. Scattered heavy showers with isolated thunderstorms.
SATURDAY Winds variable less than 10 knots. Seas 3 to 5 feet. Wave Detail: East 5 feet at 7 seconds. Scattered heavy showers with isolated thunderstorms.
SATURDAY NIGHT Winds variable less than 10 knots. Seas 3 to 4 feet. Wave Detail: East 3 feet at 7 seconds. Scattered showers.
SUNDAY Winds variable less than 10 knots. Seas to 2 feet or less. Scattered showers.
SUNDAY NIGHT Northwest winds 7 to 10 knots in the evening, becoming variable less than 10 knots. Seas to 2 feet or less, then 3 to 4 feet after midnight. Wave Detail: East northeast 4 feet at 8 seconds. Scattered showers.
MONDAY East northeast winds 10 to 15 knots, rising to 20 to 25 knots. Seas 5 to 7 feet. Wave Detail: North northeast 7 feet at 15 seconds, east northeast 6 feet at 7 seconds and northwest 3 feet at 17 seconds. Scattered showers.
TUESDAY East winds to 20 knots. In the Kaulakahi Channel, east northeast winds 10 to 15 knots, rising to 15 to 20 knots. Seas 6 to 9 feet. Wave Detail: North northeast 9 feet at 14 seconds, east 7 feet at 7 seconds and northwest 3 feet at 14 seconds. Scattered showers in the morning. Isolated showers. Winds and seas higher in and near tstms.
Kauai Channel- 321 AM HST Fri Feb 20 2026
...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE THIS AFTERNOON...
TODAY East winds 20 to 25 knots, easing to 15 to 20 knots this afternoon. Seas 7 to 9 feet. Wave Detail: East 8 feet at 8 seconds. Scattered showers this morning. Isolated thunderstorms. Numerous heavy showers this afternoon.
TONIGHT East winds 15 to 20 knots. Seas 5 to 8 feet. Wave Detail: East 8 feet at 8 seconds. Heavy showers with isolated thunderstorms.
SATURDAY Southeast winds 7 to 10 knots in the morning, becoming variable less than 10 knots. Seas 5 to 7 feet, subsiding to 3 to 5 feet in the afternoon. Wave Detail: East northeast 6 feet at 8 seconds. Numerous heavy showers with isolated thunderstorms.
SATURDAY NIGHT Winds variable less than 10 knots. Seas 3 to 5 feet. Wave Detail: East northeast 4 feet at 7 seconds. Isolated thunderstorms in the evening. Scattered showers.
SUNDAY Winds variable less than 10 knots. Seas to 3 feet in the morning, then to 2 feet or less. Wave Detail: East 3 feet at 9 seconds. Scattered showers in the morning, then numerous showers in the afternoon.
SUNDAY NIGHT Winds variable less than 10 knots. Seas to 2 feet or less, then 3 to 5 feet after midnight. Wave Detail: East northeast 5 feet at 8 seconds. Numerous showers, mainly in the evening.
MONDAY East northeast winds 15 to 20 knots. Seas 4 to 6 feet. Wave Detail: East northeast 6 feet at 7 seconds and north northeast 6 feet at 15 seconds. Scattered showers.
TUESDAY East northeast winds to 20 knots. Seas 7 to 10 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. Winds and seas higher in and near tstms.
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