FZHW50 PHFO 181312 CWFHFO Coastal Waters Forecast National Weather Service Honolulu HI 312 AM HST Wed Mar 18 2026 Hawaiian coastal waters within 40 nautical miles including the Hawaiian Islands Humpback Whale National Marine Sanctuary. 312 AM HST Wed Mar 18 2026 .Synopsis for Hawaiian coastal waters... Light to locally moderate east to southeast winds will slowly strengthen to moderate speeds by Thursday as a ridge builds to the north of the state. Winds across the coastal waters will veer to the south by Thursday into the weekend. By this weekend, a weak low approaching from the west traverses across the state and begins to lift north on Saturday, which appears likely to maintain light to moderate southerly winds for the area.
Maui County Windward Waters- 312 AM HST Wed Mar 18 2026
TODAY East winds 10 to 15 knots. Seas 5 to 7 feet. Wave Detail: North northwest 7 feet at 12 seconds. Isolated showers this morning.
TONIGHT East southeast winds 10 to 15 knots. Seas 5 to 6 feet. Wave Detail: North 5 feet at 12 seconds and northeast 3 feet at 4 seconds. Isolated showers in the evening, then scattered showers after midnight.
THURSDAY East southeast winds to 15 knots. Seas 4 to 6 feet. Wave Detail: North 5 feet at 11 seconds and northeast 3 feet at 4 seconds. Scattered showers.
THURSDAY NIGHT Southeast winds 10 to 15 knots, veering to south southeast 7 to 10 knots after midnight. Seas 4 to 5 feet. Wave Detail: North 4 feet at 10 seconds. Numerous showers.
FRIDAY South southwest winds 7 to 10 knots, becoming 10 to 15 knots in the afternoon. Seas 4 to 5 feet. Wave Detail: North 4 feet at 10 seconds. Numerous showers.
FRIDAY NIGHT South southwest winds 10 to 15 knots. Seas 4 to 5 feet. Wave Detail: North 5 feet at 11 seconds. Occasional showers.
SATURDAY South southwest winds 10 to 15 knots, becoming southwest 15 to 20 knots. Seas 5 to 6 feet. Wave Detail: North 6 feet at 11 seconds. Occasional showers.
SUNDAY West southwest winds to 10 knots, veering to north northwest 7 to 10 knots. Seas 5 to 6 feet. Wave Detail: North 5 feet at 15 seconds. Numerous showers.
Maui County Leeward Waters- 312 AM HST Wed Mar 18 2026
TODAY East winds 10 to 15 knots. Seas 4 to 6 feet. Wave Detail: North northwest 5 feet at 12 seconds and south 4 feet at 15 seconds. Isolated showers.
TONIGHT East southeast winds 10 to 15 knots, becoming southeast 15 to 20 knots after midnight. Seas 4 to 6 feet. Wave Detail: South 4 feet at 15 seconds and north 3 feet at 12 seconds. Scattered showers in the evening, then numerous showers after midnight.
THURSDAY Southeast winds 10 to 15 knots. Seas 3 to 5 feet. Wave Detail: South 4 feet at 14 seconds and north 3 feet at 11 seconds. Numerous showers.
THURSDAY NIGHT South southeast winds to 10 knots. Seas 3 to 5 feet. Wave Detail: South 4 feet at 13 seconds and north 3 feet at 10 seconds. Numerous showers.
FRIDAY South southwest winds to 10 knots. Seas 3 to 5 feet. Wave Detail: North northwest 3 feet at 12 seconds and south 3 feet at 13 seconds. Occasional showers.
FRIDAY NIGHT South southwest winds 10 to 15 knots. Seas 3 to 5 feet. Wave Detail: North northwest 4 feet at 11 seconds and south 3 feet at 12 seconds. Occasional showers.
SATURDAY South southwest winds 10 to 15 knots. Seas 3 to 5 feet. Wave Detail: North northwest 3 feet at 11 seconds. Occasional showers.
SUNDAY West southwest winds to 10 knots in the morning, becoming variable less than 10 knots, then becoming north 7 to 10 knots. Seas 3 to 4 feet. Wave Detail: North northwest 3 feet at 14 seconds. Occasional showers.
Maalaea Bay- 312 AM HST Wed Mar 18 2026
TODAY North northeast winds 10 to 15 knots, backing to west northwest 7 to 10 knots this afternoon. Seas to 2 feet or less.
TONIGHT West winds 7 to 10 knots in the evening, becoming variable less than 10 knots. Seas to 2 feet or less. Scattered showers after midnight.
THURSDAY East northeast winds 10 to 15 knots, veering to south southwest 7 to 10 knots in the afternoon. Seas to 2 feet or less. Scattered showers.
THURSDAY NIGHT Winds variable less than 10 knots. Seas to 2 feet or less. Numerous showers.
FRIDAY South winds to 10 knots. Seas to 2 feet or less. Numerous showers.
FRIDAY NIGHT South winds to 10 knots. Seas to 2 feet or less. Occasional showers.
SATURDAY South southwest winds 7 to 10 knots. Seas to 2 feet or less. Occasional showers.
SUNDAY Winds variable less than 10 knots. Seas to 2 feet or less. Numerous showers.
Pailolo Channel- 312 AM HST Wed Mar 18 2026
TODAY East northeast winds to 15 knots. Seas 3 to 5 feet.
TONIGHT East winds 10 to 15 knots. Seas 3 to 4 feet. Isolated showers in the evening, then scattered showers after midnight.
THURSDAY East southeast winds 10 to 15 knots. Seas 3 to 4 feet. Scattered showers.
THURSDAY NIGHT South southeast winds 7 to 10 knots. Seas 3 to 4 feet. Numerous showers.
FRIDAY South winds to 10 knots. Seas 3 to 4 feet. Numerous showers.
FRIDAY NIGHT South southwest winds 7 to 10 knots. Seas 3 to 4 feet. Occasional showers.
SATURDAY South southwest winds 10 to 15 knots. Seas 3 to 4 feet. Occasional showers.
SUNDAY Southwest winds to 10 knots in the morning, becoming variable less than 10 knots. Seas 3 to 4 feet. Numerous showers.
Alenuihaha Channel- 312 AM HST Wed Mar 18 2026
TODAY East northeast winds 15 to 20 knots, becoming east 10 to 15 knots this afternoon. Seas 4 to 6 feet. Wave Detail: North northwest 3 feet at 12 seconds and south 3 feet at 15 seconds. Isolated showers.
TONIGHT East southeast winds 10 to 15 knots. Seas 3 to 5 feet. Wave Detail: South 4 feet at 15 seconds. Scattered showers in the evening, then numerous showers after midnight.
THURSDAY East southeast winds 10 to 15 knots. Seas 3 to 5 feet. Wave Detail: South 3 feet at 14 seconds. Numerous showers.
THURSDAY NIGHT Southeast winds 7 to 10 knots, veering to south southwest after midnight. Seas 4 to 5 feet. Wave Detail: South 3 feet at 4 seconds and south 3 feet at 13 seconds. Occasional showers.
FRIDAY South southwest winds 10 to 15 knots. Seas 3 to 5 feet. Wave Detail: South southwest 3 feet at 4 seconds and south 3 feet at 13 seconds. Numerous showers.
FRIDAY NIGHT South southwest winds 10 to 15 knots. Seas 3 to 5 feet. Occasional showers.
SATURDAY Southwest winds 10 to 15 knots. Seas 3 to 5 feet. Occasional showers.
SUNDAY West southwest winds 7 to 10 knots, becoming variable less than 10 knots, then becoming north northeast 7 to 10 knots after midnight. Seas 3 to 4 feet. Occasional showers.
|