FZHW50 PHFO 220121 CWFHFO Coastal Waters Forecast National Weather Service Honolulu HI 321 PM HST Sat Mar 21 2026 Hawaiian coastal waters within 40 nautical miles including the Hawaiian Islands Humpback Whale National Marine Sanctuary. 321 PM HST Sat Mar 21 2026 .Synopsis for Hawaiian coastal waters... A surface low is located north of the islands with a pair of troughs draped over the region. Bands of heavy showers and thunderstorms will continue to move over the coastal waters into Sunday. The low will lift northeast of the region on Sunday, and strong high pressure will build far north of the islands Monday and Tuesday.
Maui County Windward Waters- 321 PM HST Sat Mar 21 2026
TONIGHT South southwest winds 10 to 15 knots. Seas 5 to 8 feet. Wave Detail: North northeast 6 feet at 11 seconds, south southwest 4 feet at 5 seconds and northwest 3 feet at 16 seconds. Occasional heavy showers with a slight chance of thunderstorms.
SUNDAY South southwest winds 10 to 15 knots, becoming 7 to 10 knots in the afternoon. Seas 5 to 7 feet. Wave Detail: North northeast 5 feet at 10 seconds and northwest 3 feet at 15 seconds. Occasional heavy showers with a slight chance of thunderstorms.
SUNDAY NIGHT South southeast winds 7 to 10 knots. Seas 5 to 6 feet. Wave Detail: North northeast 4 feet at 10 seconds and northwest 3 feet at 14 seconds. Heavy showers likely in the evening. A slight chance of thunderstorms. Scattered heavy showers after midnight.
MONDAY Northeast winds 10 to 15 knots. Seas 5 to 6 feet. Wave Detail: North northeast 4 feet at 9 seconds and northwest 3 feet at 13 seconds. Scattered showers.
MONDAY NIGHT East winds 15 to 20 knots, becoming east northeast 10 to 15 knots after midnight. Seas 5 to 7 feet. Wave Detail: North 5 feet at 9 seconds, east 3 feet at 4 seconds and northwest 3 feet at 12 seconds. Scattered showers.
TUESDAY East northeast winds 15 to 20 knots. Seas 6 to 7 feet. Wave Detail: North 6 feet at 9 seconds and east southeast 4 feet at 5 seconds. Scattered showers.
TUESDAY NIGHT East northeast winds 15 to 20 knots. Seas 7 to 8 feet. Wave Detail: North 6 feet at 9 seconds and east 5 feet at 7 seconds. Scattered showers.
WEDNESDAY East northeast winds 15 to 20 knots. Seas 7 to 8 feet. Wave Detail: North northeast 6 feet at 9 seconds, east 5 feet at 7 seconds and northwest 3 feet at 16 seconds. Scattered showers.
THURSDAY Northeast winds 15 to 20 knots. Seas 6 to 7 feet. Wave Detail: North northeast 5 feet at 9 seconds, east 4 feet at 7 seconds and northwest 4 feet at 15 seconds. Isolated showers. Winds and seas higher in and near tstms.
Maui County Leeward Waters- 321 PM HST Sat Mar 21 2026
TONIGHT South winds 10 to 15 knots. Seas 4 to 6 feet. Wave Detail: North 4 feet at 11 seconds and west 3 feet at 5 seconds. Occasional heavy showers with a slight chance of thunderstorms.
SUNDAY South southwest winds 10 to 15 knots, becoming 7 to 10 knots in the afternoon. Seas 3 to 5 feet. Wave Detail: North 3 feet at 10 seconds. Occasional heavy showers with a slight chance of thunderstorms.
SUNDAY NIGHT South southwest winds 7 to 10 knots in the evening, becoming variable less than 10 knots. Seas 3 to 5 feet. Wave Detail: North 3 feet at 10 seconds. Heavy showers likely in the evening. A slight chance of thunderstorms. Scattered heavy showers after midnight.
MONDAY Northeast winds 7 to 10 knots, becoming 10 to 15 knots in the afternoon. Seas 3 to 4 feet. Scattered showers, mainly in the morning.
MONDAY NIGHT Northeast winds 10 to 15 knots. Seas 3 to 4 feet. Wave Detail: East northeast 3 feet at 5 seconds and north 3 feet at 9 seconds. Isolated showers in the evening.
TUESDAY Northeast winds 10 to 15 knots. Seas 3 to 5 feet. Wave Detail: East 4 feet at 5 seconds and north 3 feet at 10 seconds.
TUESDAY NIGHT Northeast winds 15 to 20 knots, easing to 10 to 15 knots after midnight. Seas 3 to 5 feet. Wave Detail: East 4 feet at 5 seconds and north 3 feet at 9 seconds.
WEDNESDAY Northeast winds 10 to 15 knots, rising to 15 to 20 knots. Seas 3 to 5 feet. Wave Detail: East northeast 4 feet at 5 seconds and north 3 feet at 9 seconds.
THURSDAY Northeast winds 15 to 20 knots. Seas 3 to 5 feet. Wave Detail: East northeast 3 feet at 5 seconds and north 3 feet at 9 seconds. Winds and seas higher in and near tstms.
Maalaea Bay- 321 PM HST Sat Mar 21 2026
TONIGHT South winds 7 to 10 knots. Seas to 2 feet or less. Occasional heavy showers with a slight chance of thunderstorms.
SUNDAY South southeast winds 7 to 10 knots in the morning, becoming variable less than 10 knots. Seas to 2 feet or less. Occasional heavy showers with a slight chance of thunderstorms.
SUNDAY NIGHT Winds variable less than 10 knots. Seas to 2 feet or less. Heavy showers likely in the evening. A slight chance of thunderstorms. Scattered heavy showers after midnight.
MONDAY Winds variable less than 10 knots, becoming north to 15 knots in the afternoon. Seas to 2 feet or less. Scattered showers.
MONDAY NIGHT North winds to 20 knots, easing to 15 knots after midnight. Seas to 2 feet or less. Isolated showers in the evening.
TUESDAY North winds to 20 knots, rising to 25 knots in the afternoon. Seas to 2 feet or less.
TUESDAY NIGHT North winds to 25 knots. Seas to 2 feet or less. Wave Detail: North northeast 2 feet at 3 seconds.
WEDNESDAY North winds to 25 knots. Seas to 2 feet or less. Wave Detail: North northeast 2 feet at 3 seconds.
THURSDAY North winds to 25 knots, easing to 20 knots after midnight. Seas to 2 feet or less. Winds and seas higher in and near tstms.
Pailolo Channel- 321 PM HST Sat Mar 21 2026
TONIGHT South winds 10 to 15 knots. Seas 3 to 5 feet. Wave Detail: West southwest 3 feet at 5 seconds. Occasional heavy showers with a slight chance of thunderstorms.
SUNDAY South winds 7 to 10 knots. Seas 3 to 4 feet. Occasional heavy showers with a slight chance of thunderstorms.
SUNDAY NIGHT South winds 7 to 10 knots in the evening, becoming variable less than 10 knots. Seas to 3 feet. Heavy showers likely in the evening. A slight chance of thunderstorms. Scattered heavy showers after midnight.
MONDAY Winds variable less than 10 knots, becoming northeast 10 to 15 knots in the afternoon. Seas to 3 feet. Scattered showers, mainly in the morning.
MONDAY NIGHT East northeast winds 15 to 20 knots, becoming northeast 10 to 15 knots after midnight. Seas 3 to 4 feet. Isolated showers.
TUESDAY East northeast winds 15 to 20 knots, rising to 20 to 25 knots in the afternoon. Seas 3 to 5 feet. Wave Detail: East 3 feet at 4 seconds.
TUESDAY NIGHT East northeast winds 20 to 25 knots. Seas 4 to 6 feet. Wave Detail: East 3 feet at 4 seconds.
WEDNESDAY East northeast winds 20 to 25 knots. Seas 3 to 5 feet. Wave Detail: East 3 feet at 4 seconds and east northeast 3 feet at 9 seconds.
THURSDAY Northeast winds 20 to 25 knots, easing to 15 to 20 knots after midnight. Seas 3 to 5 feet. Wave Detail: East 3 feet at 4 seconds. Winds and seas higher in and near tstms.
Alenuihaha Channel- 321 PM HST Sat Mar 21 2026
TONIGHT Southwest winds to 10 knots. Seas 4 to 6 feet. Occasional heavy showers with a slight chance of thunderstorms.
SUNDAY Southwest winds 10 to 15 knots, backing to south southwest 7 to 10 knots in the afternoon. Seas 3 to 5 feet. Occasional heavy showers with a slight chance of thunderstorms.
SUNDAY NIGHT South winds 7 to 10 knots. Seas 3 to 4 feet. Heavy showers likely with a slight chance of thunderstorms.
MONDAY Winds variable less than 10 knots, becoming northeast 10 to 15 knots in the afternoon. Seas 3 to 4 feet. Scattered showers.
MONDAY NIGHT East northeast winds 15 to 20 knots, easing to 10 to 15 knots after midnight. Seas 3 to 5 feet. Wave Detail: East 4 feet at 4 seconds. Isolated showers.
TUESDAY East northeast winds 15 to 20 knots. Seas 4 to 6 feet. Wave Detail: East 5 feet at 6 seconds. Scattered showers.
TUESDAY NIGHT East northeast winds 20 to 25 knots. Seas 5 to 7 feet. Wave Detail: East 5 feet at 6 seconds and north northeast 3 feet at 9 seconds. Scattered showers.
WEDNESDAY Northeast winds 20 to 25 knots. Seas 4 to 6 feet. Wave Detail: East 5 feet at 6 seconds and north northeast 3 feet at 9 seconds. Scattered showers.
THURSDAY Northeast winds 15 to 20 knots, rising to 20 to 25 knots in the evening, easing to 15 to 20 knots after midnight. Seas 4 to 6 feet. Wave Detail: East 5 feet at 6 seconds and northeast 3 feet at 9 seconds. Isolated showers after midnight. Winds and seas higher in and near tstms.
|