FZHW50 PHFO 200142 CWFHFO Coastal Waters Forecast National Weather Service Honolulu HI 342 PM HST Sun Apr 19 2026 Hawaiian coastal waters within 40 nautical miles including the Hawaiian Islands Humpback Whale National Marine Sanctuary. 342 PM HST Sun Apr 19 2026 .Synopsis for Hawaiian coastal waters... A series of low pressure troughs passing northwest of the islands will weaken the ridge over the state, causing weak southeasterly flow to develop across the local waters through Wednesday. Moderate northeast trade winds return by late Wednesday and last through the weekend as high pressure builds north of the state.
Maui County Windward Waters- 342 PM HST Sun Apr 19 2026
TONIGHT East southeast winds 10 to 15 knots. Seas to 4 feet. Wave Detail: East 4 feet at 7 seconds. Isolated heavy showers this evening. Isolated thunderstorms.
MONDAY East southeast winds 10 to 15 knots. Seas to 4 feet. Wave Detail: East 4 feet at 7 seconds. Isolated thunderstorms in the morning.
MONDAY NIGHT Southeast winds 7 to 10 knots. Seas 4 to 5 feet. Wave Detail: East 3 feet at 7 seconds and north northeast 3 feet at 8 seconds.
TUESDAY East southeast winds 7 to 10 knots. Seas to 5 feet. Wave Detail: North northeast 4 feet at 16 seconds and east southeast 3 feet at 7 seconds.
TUESDAY NIGHT East southeast winds 7 to 10 knots. Seas 5 to 6 feet. Wave Detail: North northeast 5 feet at 15 seconds, east southeast 3 feet at 7 seconds and northwest 3 feet at 12 seconds.
WEDNESDAY East winds 7 to 10 knots. Seas 5 to 6 feet. Wave Detail: North northeast 5 feet at 13 seconds and north northwest 3 feet at 13 seconds.
WEDNESDAY NIGHT East winds to 10 knots. Seas to 5 feet. Wave Detail: North northeast 4 feet at 12 seconds and north northwest 3 feet at 12 seconds.
THURSDAY East northeast winds 10 to 15 knots. Seas 4 to 5 feet. Wave Detail: North northeast 4 feet at 10 seconds, east southeast 3 feet at 4 seconds and north northwest 3 feet at 15 seconds.
FRIDAY East northeast winds 10 to 15 knots. Seas 4 to 5 feet. Wave Detail: East southeast 4 feet at 5 seconds, north northeast 3 feet at 9 seconds and northwest 3 feet at 12 seconds. Isolated showers after midnight. Winds and seas higher in and near tstms.
Maui County Leeward Waters- 342 PM HST Sun Apr 19 2026
TONIGHT East winds 10 to 15 knots. Seas 3 to 4 feet. Wave Detail: East southeast 3 feet at 5 seconds. Isolated heavy showers and thunderstorms.
MONDAY East winds 7 to 10 knots in the morning, becoming variable less than 10 knots. Seas to 3 feet in the morning, then to 2 feet or less. Isolated thunderstorms in the morning.
MONDAY NIGHT Southeast winds 7 to 10 knots in the evening, becoming variable less than 10 knots. Seas to 2 feet or less, then to 3 feet after midnight.
TUESDAY Winds variable less than 10 knots. Seas to 3 feet.
TUESDAY NIGHT Winds variable less than 10 knots. Seas 3 to 4 feet.
WEDNESDAY Winds variable less than 10 knots, becoming northeast 7 to 10 knots in the afternoon. Seas 3 to 4 feet.
WEDNESDAY NIGHT Northeast winds to 10 knots. Seas 3 to 4 feet.
THURSDAY Northeast winds 10 to 15 knots. Seas 3 to 4 feet. Wave Detail: East northeast 3 feet at 5 seconds.
FRIDAY Northeast winds 10 to 15 knots, rising to 15 to 20 knots in the evening, then becoming east northeast 10 to 15 knots after midnight. Seas 3 to 4 feet. Wave Detail: East 3 feet at 4 seconds. Winds and seas higher in and near tstms.
Maalaea Bay- 342 PM HST Sun Apr 19 2026
TONIGHT Winds variable less than 10 knots. Seas to 2 feet or less.
MONDAY Winds variable less than 10 knots, becoming southwest 7 to 10 knots in the afternoon. Seas to 2 feet or less.
MONDAY NIGHT Winds variable less than 10 knots. Seas to 2 feet or less.
TUESDAY Winds variable less than 10 knots. Seas to 2 feet or less.
TUESDAY NIGHT Winds variable less than 10 knots. Seas to 2 feet or less.
WEDNESDAY Winds variable less than 10 knots, becoming north northeast to 10 knots in the afternoon. Seas to 2 feet or less.
WEDNESDAY NIGHT North northeast winds to 10 knots. Seas to 2 feet or less.
THURSDAY North northeast winds 10 to 15 knots. Seas to 2 feet or less.
FRIDAY North northeast winds to 15 knots. Seas to 2 feet or less.
Pailolo Channel- 342 PM HST Sun Apr 19 2026
TONIGHT East northeast winds 10 to 15 knots. Seas to 3 feet. Wave Detail: East 3 feet at 4 seconds. Isolated heavy showers and thunderstorms.
MONDAY East southeast winds 7 to 10 knots. Seas to 3 feet.
MONDAY NIGHT Winds variable less than 10 knots. Seas 3 to 4 feet.
TUESDAY Winds variable less than 10 knots. Seas 3 to 4 feet.
TUESDAY NIGHT Winds variable less than 10 knots. Seas 3 to 4 feet.
WEDNESDAY Winds variable less than 10 knots, becoming northeast 10 to 15 knots in the afternoon. Seas 3 to 4 feet.
WEDNESDAY NIGHT East northeast winds 10 to 15 knots. Seas 3 to 4 feet.
THURSDAY Northeast winds 10 to 15 knots. Seas to 3 feet.
FRIDAY Northeast winds 10 to 15 knots, becoming east northeast 15 to 20 knots after midnight. Seas to 3 feet. Wave Detail: East northeast 3 feet at 4 seconds. Winds and seas higher in and near tstms.
Alenuihaha Channel- 342 PM HST Sun Apr 19 2026
TONIGHT East northeast winds 15 to 20 knots. Seas 3 to 5 feet. Wave Detail: East 5 feet at 5 seconds. Isolated showers this evening.
MONDAY East winds 10 to 15 knots. Seas to 3 feet. Wave Detail: East 3 feet at 5 seconds.
MONDAY NIGHT East winds 7 to 10 knots. Seas 3 to 4 feet. Wave Detail: East 3 feet at 4 seconds.
TUESDAY Northeast winds 7 to 10 knots. Seas 3 to 5 feet. Wave Detail: East 3 feet at 7 seconds.
TUESDAY NIGHT East northeast winds 7 to 10 knots. Seas 3 to 5 feet. Wave Detail: North northeast 3 feet at 15 seconds.
WEDNESDAY East northeast winds 7 to 10 knots, becoming 10 to 15 knots in the afternoon. Seas 3 to 5 feet. Wave Detail: North northeast 3 feet at 14 seconds.
WEDNESDAY NIGHT East northeast winds 10 to 15 knots. Seas 3 to 5 feet. Wave Detail: North northeast 3 feet at 12 seconds.
THURSDAY East northeast winds 10 to 15 knots, rising to 15 to 20 knots. Seas 3 to 5 feet. Wave Detail: East 3 feet at 4 seconds.
FRIDAY East northeast winds 15 to 20 knots. Seas 3 to 5 feet. Wave Detail: East 4 feet at 5 seconds.
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