FZHW50 PHFO 190107 CWFHFO Coastal Waters Forecast National Weather Service Honolulu HI 307 PM HST Sun Oct 18 2026 Hawaiian coastal waters within 40 nautical miles including the Hawaiian Islands Humpback Whale National Marine Sanctuary. 307 PM HST Sun Oct 18 2026 .Synopsis for Hawaiian coastal waters... Robust surface high pressure centered far north of Hawaii will maintain fresh to strong trade winds into Tuesday. Trades will steadily decrease late Tuesday and Wednesday as the high weakens and moves eastward. Trade winds will lower to gentle strength, or may become disrupted, as a low passes to the north Thursday and Friday.
Kauai Northwest Waters- 307 PM HST Sun Oct 18 2026
...SMALL CRAFT ADVISORY IN EFFECT THROUGH EARLY TUESDAY MORNING...
TONIGHT
East northeast winds 20 to 25 knots. Seas 8 to 9 feet. Wave Detail: East 8 feet at 8 seconds and north northwest 3 feet at 12 seconds. Scattered showers.
MONDAY
East northeast winds 20 to 25 knots. Seas 7 to 9 feet. Wave Detail: East 8 feet at 8 seconds and northwest 3 feet at 11 seconds. Scattered showers.
MONDAY NIGHT
East northeast winds 20 to 25 knots. Seas 7 to 8 feet. Wave Detail: East 8 feet at 8 seconds. Scattered showers.
TUESDAY
East northeast winds to 20 knots. Seas 7 to 8 feet. Wave Detail: East 8 feet at 8 seconds. Scattered showers.
TUESDAY NIGHT
East winds to 20 knots. Seas 7 to 8 feet. Wave Detail: East 8 feet at 8 seconds. Scattered showers.
WEDNESDAY
East winds 15 to 20 knots. Seas 5 to 8 feet, subsiding to 5 to 6 feet in the afternoon. Wave Detail: East 8 feet at 8 seconds. Scattered showers.
WEDNESDAY NIGHT
East winds 15 to 20 knots. Seas 5 to 6 feet. Wave Detail: East 6 feet at 7 seconds. Scattered showers, mainly in the evening.
THURSDAY
East northeast winds 10 to 15 knots. Seas 4 to 5 feet. Wave Detail: East 5 feet at 7 seconds and northwest 3 feet at 11 seconds. Scattered showers.
FRIDAY
East northeast winds 10 to 15 knots. Seas 4 to 5 feet. Wave Detail: East 4 feet at 12 seconds and northwest 3 feet at 11 seconds. Isolated showers through the day.
Kauai Windward Waters- 307 PM HST Sun Oct 18 2026
...SMALL CRAFT ADVISORY IN EFFECT THROUGH EARLY TUESDAY MORNING...
TONIGHT
East northeast winds 20 to 25 knots. Seas 9 to 10 feet. Wave Detail: East 9 feet at 8 seconds and north 3 feet at 12 seconds. Numerous showers.
MONDAY
East northeast winds 20 to 25 knots. Seas 8 to 10 feet. Wave Detail: East 9 feet at 8 seconds and northwest 3 feet at 11 seconds. Numerous showers, mainly in the morning.
MONDAY NIGHT
East northeast winds 20 to 25 knots. Seas to 8 feet. Wave Detail: East 8 feet at 8 seconds. Numerous showers, mainly in the evening.
TUESDAY
East winds to 20 knots. Seas to 8 feet. Wave Detail: East 8 feet at 8 seconds. Scattered showers.
TUESDAY NIGHT
East winds to 20 knots. Seas to 8 feet. Wave Detail: East 8 feet at 8 seconds. Scattered showers.
WEDNESDAY
East winds 15 to 20 knots. Seas 6 to 8 feet. Wave Detail: East 8 feet at 8 seconds. Scattered showers.
WEDNESDAY NIGHT
East winds 10 to 15 knots. Seas 5 to 6 feet. Wave Detail: East 6 feet at 7 seconds. Scattered showers.
THURSDAY
East winds to 10 knots. Seas to 5 feet. Wave Detail: East 5 feet at 7 seconds and northwest 3 feet at 11 seconds. Scattered showers.
FRIDAY
East northeast winds 10 to 15 knots. Seas to 5 feet. Wave Detail: East 4 feet at 12 seconds and northwest 3 feet at 11 seconds. Isolated showers in the morning. Isolated showers in the evening, then scattered showers after midnight.
Kauai Leeward Waters- 307 PM HST Sun Oct 18 2026
...SMALL CRAFT ADVISORY IN EFFECT THROUGH EARLY TUESDAY MORNING...
TONIGHT
East northeast winds 20 to 25 knots. Seas 7 to 9 feet. Wave Detail: East 8 feet at 8 seconds and north northwest 3 feet at 12 seconds. Scattered showers.
MONDAY
East northeast winds 20 to 25 knots. Seas 6 to 8 feet. Wave Detail: East 8 feet at 8 seconds. Scattered showers.
MONDAY NIGHT
East winds 20 to 25 knots. Seas 6 to 8 feet. Wave Detail: East 8 feet at 8 seconds. Scattered showers.
TUESDAY
East northeast winds to 20 knots. Seas 5 to 8 feet. Wave Detail: East 8 feet at 8 seconds. Scattered showers in the morning. Isolated showers in the afternoon.
TUESDAY NIGHT
East northeast winds to 20 knots. Seas 5 to 8 feet. Wave Detail: East 8 feet at 8 seconds. Scattered showers in the evening. Isolated showers after midnight.
WEDNESDAY
East winds 15 to 20 knots. Seas 5 to 7 feet. Wave Detail: East 7 feet at 7 seconds. Isolated showers in the morning. Scattered showers in the afternoon.
WEDNESDAY NIGHT
East northeast winds 15 to 20 knots. Seas 4 to 6 feet. Wave Detail: East 6 feet at 7 seconds. Scattered showers in the evening. Isolated showers after midnight.
THURSDAY
East northeast winds 10 to 15 knots. Seas 3 to 5 feet. Wave Detail: East 4 feet at 6 seconds and northwest 3 feet at 11 seconds. Isolated showers in the morning. Scattered showers in the evening.
FRIDAY
East northeast winds 10 to 15 knots. In the Kaulakahi Channel, east northeast winds 10 to 15 knots, becoming variable less than 10 knots. Seas 3 to 5 feet. Wave Detail: East 4 feet at 5 seconds and northwest 3 feet at 11 seconds. Isolated showers through the day.
Kauai Channel- 307 PM HST Sun Oct 18 2026
...SMALL CRAFT ADVISORY IN EFFECT THROUGH EARLY TUESDAY MORNING...
TONIGHT
East northeast winds 20 to 25 knots. Seas 7 to 9 feet. Wave Detail: East northeast 8 feet at 8 seconds. Scattered showers.
MONDAY
East northeast winds 20 to 25 knots. Seas 6 to 8 feet. Wave Detail: East northeast 8 feet at 7 seconds. Scattered showers, mainly in the morning.
MONDAY NIGHT
East northeast winds 20 to 25 knots. Seas 6 to 8 feet. Wave Detail: East northeast 8 feet at 7 seconds. Scattered showers.
TUESDAY
East northeast winds to 20 knots. Seas 6 to 8 feet. Wave Detail: East northeast 8 feet at 7 seconds. Scattered showers in the morning. Isolated showers in the afternoon.
TUESDAY NIGHT
East northeast winds to 20 knots. Seas 6 to 8 feet. Wave Detail: East northeast 8 feet at 7 seconds. Isolated showers.
WEDNESDAY
East northeast winds 15 to 20 knots. Seas 5 to 8 feet, subsiding to 5 to 6 feet in the afternoon. Wave Detail: East northeast 8 feet at 7 seconds. Isolated showers in the morning. Scattered showers in the afternoon.
WEDNESDAY NIGHT
East northeast winds 15 to 20 knots, becoming east 10 to 15 knots after midnight. Seas 4 to 6 feet. Wave Detail: East 6 feet at 6 seconds. Scattered showers, mainly in the evening.
THURSDAY
East northeast winds 10 to 15 knots. Seas 4 to 5 feet. Wave Detail: East 4 feet at 6 seconds. Isolated showers through the night, then scattered showers in the evening.
FRIDAY
East northeast winds to 10 knots, rising to 15 knots. Seas 4 to 5 feet. Wave Detail: East 4 feet at 5 seconds, south southwest 3 feet at 14 seconds and north northwest 3 feet at 15 seconds. Isolated showers through the day.
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