Hawaiian Coastal Waters Forecast

SYNOPSIS FOR HAWAIIAN COASTAL WATERS
Aug 21, 2017 3:25 pm HST

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Synopsis for Hawaiian coastal waters:
A weak cold front far to the north has weakened the subtropical ridge of high pressure. As the front moves east, high pressure will rebuild north of the area on Tuesday and strengthen the trade winds. An upper level low will produce unstable conditions over the western waters through Tuesday.


Kauai Northwest Waters-
Aug 21, 2017 3:25 pm HST

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TONIGHT:
East winds 15 knots. Wind waves 5 feet. Swell east 3 feet. Heavy showers likely in the evening. Slight chance of thunderstorms through the night. Scattered heavy showers after midnight.

TUESDAY:
East winds 15 knots. Wind waves 5 feet. Swell east 3 feet. Scattered heavy showers and slight chance of thunderstorms.

TUESDAY NIGHT:
East winds 20 knots. Wind waves 5 feet. Swell east 3 feet. Scattered showers.

WEDNESDAY:
East winds 20 knots. Wind waves 6 feet. Swell east 3 feet. Scattered showers in the morning, then isolated showers in the afternoon.

WEDNESDAY NIGHT:
East winds 15 knots. Wind waves 7 feet. Swell east 3 to 4 feet. Isolated showers after midnight.

THURSDAY:
East winds 20 knots. Wind waves 7 feet. Swell east 4 feet. Isolated showers in the morning.

THURSDAY NIGHT:
East winds 20 knots. Wind waves 7 feet. Swell east 4 feet. Isolated showers after midnight.

FRIDAY:
East winds 15 knots. Wind waves 6 feet. Swell east 3 to 4 feet. Isolated showers.

SATURDAY:
East winds 15 knots. Wind waves 4 to 5 feet. Swell east 3 feet. Scattered showers.


Kauai Windward Waters-
Aug 21, 2017 3:25 pm HST

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TONIGHT:
East winds 15 knots. Wind waves 5 feet. Swell east 3 feet. Heavy showers likely in the evening. Slight chance of thunderstorms through the night. Scattered heavy showers after midnight.

TUESDAY:
East winds 15 knots. Wind waves 5 feet. Swell east 3 feet. Scattered heavy showers and slight chance of thunderstorms.

TUESDAY NIGHT:
East winds 15 knots. Wind waves 6 feet. Swell east 3 feet. Scattered showers.

WEDNESDAY:
East winds 15 knots. Wind waves 7 feet. Swell east 3 feet. Scattered showers in the morning, then isolated showers in the afternoon.

WEDNESDAY NIGHT:
East winds 15 knots. Wind waves 7 feet. Swell east 3 to 4 feet. Isolated showers after midnight.

THURSDAY:
East winds 15 knots. Wind waves 7 feet. Swell east 4 feet. Isolated showers in the morning.

THURSDAY NIGHT:
East winds 15 knots. Wind waves 7 feet. Swell east 4 feet. Isolated showers after midnight.

FRIDAY:
East winds 15 knots. Wind waves 5 to 6 feet. Swell east 3 to 4 feet. Isolated showers.

SATURDAY:
East winds 10 knots. Wind waves 3 to 4 feet. Swell east 3 feet. Scattered showers.


Kauai Leeward Waters-
Aug 21, 2017 3:25 pm HST

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TONIGHT:
East winds 15 knots. Wind waves 5 feet. Scattered heavy showers and slight chance of thunderstorms.

TUESDAY:
East winds 15 knots. Wind waves 5 feet. Scattered heavy showers and slight chance of thunderstorms.

TUESDAY NIGHT:
East winds 20 knots. Wind waves 5 feet. South swell 3 feet after midnight. Isolated showers in the evening, then scattered showers after midnight.

WEDNESDAY:
East winds 20 knots. Wind waves 6 feet. South swell 3 feet. Scattered showers in the morning, then isolated showers in the afternoon.

WEDNESDAY NIGHT:
East winds 20 knots. Wind waves 6 feet. South swell 3 feet.

THURSDAY:
East winds 20 knots. Wind waves 6 feet. South swell 3 feet.

THURSDAY NIGHT:
East winds 20 knots. Wind waves 6 feet. Southeast swell 3 feet.

FRIDAY:
East winds 15 knots. Wind waves 6 feet. Southeast swell 3 feet and east 3 feet.

SATURDAY:
East winds 15 knots. Wind waves 5 feet. Southeast swell 3 feet and east 3 feet. Isolated showers.


Kauai Channel-
Aug 21, 2017 3:25 pm HST

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TONIGHT:
East winds 15 knots. Wind waves 5 feet. Swell east 3 feet. Isolated thunderstorms in the evening. Scattered heavy showers through the night.

TUESDAY:
East winds 15 knots. Wind waves 5 feet. Swell east 3 feet. Scattered heavy showers.

TUESDAY NIGHT:
East winds 20 knots. Wind waves 5 feet. South swell 3 feet after midnight. Swell east 3 feet. Isolated showers in the evening, then scattered showers after midnight.

WEDNESDAY:
East winds 20 knots. Wind waves 6 feet. South swell 3 feet and east 3 feet. Scattered showers in the morning, then isolated showers in the afternoon.

WEDNESDAY NIGHT:
East winds 20 knots. Wind waves 7 feet. South swell 3 feet and east 3 to 4 feet. Isolated showers after midnight.

THURSDAY:
East winds 20 knots. Wind waves 7 feet. South swell 3 feet and east 4 feet. Isolated showers in the morning.

THURSDAY NIGHT:
East winds 20 knots. Wind waves 7 feet. South swell 3 feet and east 4 feet. Isolated showers after midnight.

FRIDAY:
East winds 15 knots. Wind waves 6 feet. Southeast swell 3 feet and east 3 to 4 feet. Isolated showers.

SATURDAY:
East winds 15 knots. Wind waves 5 feet. Southeast swell 3 feet and east 3 feet. Isolated showers.


Oahu Windward Waters-
Aug 21, 2017 3:25 pm HST

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TONIGHT:
East winds 15 knots. Wind waves 5 feet. Swell east 3 feet. Heavy showers likely and isolated thunderstorms in the evening, then scattered heavy showers after midnight.

TUESDAY:
East winds 15 knots. Wind waves 5 feet. Swell east 3 feet. Scattered heavy showers.

TUESDAY NIGHT:
East winds 20 knots. Wind waves 6 feet. Swell east 3 feet. Scattered showers.

WEDNESDAY:
East winds 20 knots. Wind waves 7 feet. Swell east 3 feet. Scattered showers in the morning, then isolated showers in the afternoon.

WEDNESDAY NIGHT:
East winds 20 knots. Wind waves 7 feet. Swell east 4 feet. Isolated showers after midnight.

THURSDAY:
East winds 20 knots. Wind waves 7 feet. Swell east 4 feet. Isolated showers in the morning.

THURSDAY NIGHT:
East winds 20 knots. Wind waves 7 feet. Swell east 4 feet. Isolated showers after midnight.

FRIDAY:
East winds 15 knots. Wind waves 5 to 6 feet. Swell east 3 to 4 feet. Isolated showers.

SATURDAY:
East winds 15 knots. Wind waves 4 to 5 feet. Swell east 3 feet. Scattered showers.


Oahu Leeward Waters-
Aug 21, 2017 3:25 pm HST

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TONIGHT:
East winds 15 knots. Wind waves 4 feet. Isolated thunderstorms in the evening. Scattered heavy showers through the night.

TUESDAY:
East winds 15 knots. Wind waves 4 feet. Scattered heavy showers.

TUESDAY NIGHT:
East winds 15 knots. Wind waves 4 feet. Isolated showers.

WEDNESDAY:
East winds 15 knots. Wind waves 5 feet. South swell 3 feet and east 3 feet in the afternoon. Isolated showers through the day.

WEDNESDAY NIGHT:
East winds 15 knots. Wind waves 6 feet. South swell 3 feet and east 3 feet.

THURSDAY:
East winds 20 knots. Wind waves 5 feet. South swell 3 feet and east 3 feet.

THURSDAY NIGHT:
East winds 20 knots. Wind waves 5 feet. Southeast swell 3 feet and east 4 feet.

FRIDAY:
East winds 15 knots. Wind waves 5 feet. Southeast swell 3 feet and east 4 feet.

SATURDAY:
East winds 10 knots. Wind waves 4 feet. Swell east 3 to 4 feet. Isolated showers.


Kaiwi Channel-
Aug 21, 2017 3:25 pm HST

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TONIGHT:
East winds 15 knots. Wind waves 5 feet. Swell east 3 feet. Slight chance of thunderstorms in the evening. Scattered heavy showers through the night.

TUESDAY:
East winds 15 knots. Wind waves 6 feet. Swell east 3 feet. Scattered heavy showers.

TUESDAY NIGHT:
East winds 15 knots. Wind waves 6 feet. Swell east 3 feet. Isolated showers in the evening, then scattered showers after midnight.

WEDNESDAY:
East winds 15 knots. Wind waves 7 feet. Swell east 3 feet. Scattered showers in the morning, then isolated showers in the afternoon.

WEDNESDAY NIGHT:
East winds 20 knots. Wind waves 7 feet. Swell east 4 feet. Isolated showers after midnight.

THURSDAY:
East winds 20 knots. Wind waves 7 feet. Swell east 4 feet. Isolated showers in the morning.

THURSDAY NIGHT:
East winds 20 knots. Wind waves 7 feet. Swell east 4 feet. Isolated showers after midnight.

FRIDAY:
East winds 15 knots. Wind waves 5 to 6 feet. Swell east 3 to 4 feet. Isolated showers.

SATURDAY:
East winds 15 knots. Wind waves 5 feet. Swell east 3 feet. Isolated showers.


Maui County Windward Waters-
Aug 21, 2017 3:25 pm HST

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TONIGHT:
East winds 15 knots. Wind waves 5 feet. Swell east 3 feet. Heavy showers likely in the evening, then scattered heavy showers after midnight.

TUESDAY:
East winds 15 knots. Wind waves 6 feet. Swell east 3 feet. Heavy showers likely in the morning, then scattered heavy showers in the afternoon.

TUESDAY NIGHT:
East winds 15 knots. Wind waves 6 feet. Swell east 3 feet. Scattered showers.

WEDNESDAY:
East winds 15 knots. Wind waves 7 feet. Swell east 3 to 4 feet. Scattered showers.

WEDNESDAY NIGHT:
East winds 20 knots. Wind waves 7 feet. Swell east 4 feet. Isolated showers after midnight.

THURSDAY:
East winds 20 knots. Wind waves 7 feet. Swell east 4 feet. Isolated showers in the morning.

THURSDAY NIGHT:
East winds 20 knots. Wind waves 7 feet. Swell east 4 feet. Isolated showers after midnight.

FRIDAY:
East winds 15 knots. Wind waves 5 to 6 feet. Swell east 3 to 4 feet. Isolated showers.

SATURDAY:
East winds 15 knots. Wind waves 5 feet. Swell east 3 feet. Scattered showers.


Maui County Leeward Waters-
Aug 21, 2017 3:25 pm HST

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TONIGHT:
East winds 20 knots. Wind waves 4 feet. Slight chance of thunderstorms in the evening. Scattered heavy showers through the night.

TUESDAY:
Northeast winds 15 knots. Wind waves 5 feet. Scattered heavy showers in the morning, then isolated showers in the afternoon.

TUESDAY NIGHT:
Northeast winds 15 knots. Wind waves 4 feet. Isolated showers.

WEDNESDAY:
East winds 15 knots. Wind waves 5 feet. Swell east 3 feet. Isolated showers in the morning.

WEDNESDAY NIGHT:
Northeast winds 15 knots. Wind waves 6 feet. Swell east 3 feet.

THURSDAY:
Northeast winds 15 knots. Wind waves 5 feet. Swell east 3 feet.

THURSDAY NIGHT:
Northeast winds 15 knots. Wind waves 5 feet. Swell east 3 feet.

FRIDAY:
Northeast winds 15 knots. Wind waves 4 to 5 feet. Swell east 3 feet.

SATURDAY:
East winds 10 knots. Wind waves 3 feet.


Maalaea Bay-
Aug 21, 2017 3:25 pm HST

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TONIGHT:
North winds 20 knots. Wind waves 2 feet or less. Scattered heavy showers in the evening, then isolated heavy showers after midnight.

TUESDAY:
North winds 20 knots. Wind waves 2 feet or less. Isolated heavy showers.

TUESDAY NIGHT:
North winds to 25 knots. Wind waves 2 feet or less.

WEDNESDAY:
North winds to 25 knots. Wind waves 2 feet or less then 3 feet in the afternoon.

WEDNESDAY NIGHT:
North winds to 25 knots. Wind waves 3 feet.

THURSDAY:
Northeast winds to 25 knots. Wind waves 3 feet.

THURSDAY NIGHT:
Northeast winds to 25 knots. Wind waves 3 feet.

FRIDAY:
Northeast winds 20 knots. Wind waves 3 feet.

SATURDAY:
Northeast winds 20 knots. Wind waves 5 feet.


Pailolo Channel-
Aug 21, 2017 3:25 pm HST

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TONIGHT:
East winds 15 knots. Wind waves 5 feet. Swell east 3 feet. Scattered heavy showers.

TUESDAY:
East winds 20 knots. Wind waves 5 feet. Swell east 3 feet. Scattered heavy showers.

TUESDAY NIGHT:
East winds to 25 knots. Wind waves 5 feet. Swell east 3 feet. Scattered showers in the evening, then isolated showers after midnight.

WEDNESDAY:
East winds to 25 knots. Wind waves 7 feet. Swell east 3 feet. Isolated showers through the day.

WEDNESDAY NIGHT:
East winds to 25 knots. Wind waves 7 feet. Swell east 4 feet. Isolated showers after midnight.

THURSDAY:
Northeast winds to 25 knots. Wind waves 7 feet. Swell east 4 feet. Isolated showers in the morning.

THURSDAY NIGHT:
East winds to 25 knots. Wind waves 6 feet. Swell east 4 feet. Isolated showers after midnight.

FRIDAY:
East winds 20 knots. Wind waves 5 to 6 feet. Swell east 3 to 4 feet. Isolated showers.

SATURDAY:
East winds 20 knots. Wind waves 7 feet. Swell east 3 feet. Isolated showers.


Alenuihaha Channel-
Aug 21, 2017 3:25 pm HST

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TONIGHT:
East winds 20 knots. Wind waves 6 feet. Swell east 3 feet. Isolated heavy showers in the evening, then scattered heavy showers after midnight.

TUESDAY:
East winds 20 knots. Wind waves 6 feet. Swell east 3 feet. Scattered heavy showers.

TUESDAY NIGHT:
East winds to 25 knots. Wind waves 6 feet. Swell east 3 feet. Scattered showers in the evening. Isolated showers after midnight.

WEDNESDAY:
East winds to 25 knots. Wind waves 7 feet. Swell east 3 to 4 feet. Isolated showers in the morning. Scattered showers in the afternoon.

WEDNESDAY NIGHT:
East winds to 25 knots. Wind waves 8 feet. Swell east 4 feet. Isolated showers after midnight.

THURSDAY:
East winds to 30 knots. Wind waves 8 feet. Swell east 4 feet. Isolated showers in the morning.

THURSDAY NIGHT:
East winds to 30 knots. Wind waves 7 feet. Swell east 4 feet. Isolated showers after midnight.

FRIDAY:
East winds 20 knots. Wind waves 6 to 7 feet. Swell east 3 to 4 feet.

SATURDAY:
East winds 20 knots. Wind waves 7 feet. Swell east 3 feet. Isolated showers.


Big Island Windward Waters-
Aug 21, 2017 3:25 pm HST

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TONIGHT:
East winds 15 knots. Wind waves 5 feet. Swell east 3 feet. Heavy showers likely.

TUESDAY:
East winds 15 knots. Wind waves 5 feet. Swell east 3 feet. Heavy showers likely in the morning, then scattered heavy showers in the afternoon.

TUESDAY NIGHT:
East winds 15 knots. Wind waves 5 feet. Swell east 3 feet. Scattered showers.

WEDNESDAY:
East winds 15 knots. Wind waves 6 feet. Southeast swell 3 feet and east 4 feet. Scattered showers.

WEDNESDAY NIGHT:
East winds 15 knots. Wind waves 7 feet. Southeast swell 3 feet and east 5 feet. Isolated showers after midnight.

THURSDAY:
East winds 20 knots. Wind waves 6 feet. Southeast swell 3 feet and east 4 feet. Isolated showers in the morning.

THURSDAY NIGHT:
East winds 15 knots. Wind waves 6 feet. Swell east 4 feet. Isolated showers after midnight.

FRIDAY:
East winds 15 knots. Wind waves 5 feet. Swell east 3 to 4 feet. Isolated showers.

SATURDAY:
East winds 15 knots. Wind waves 4 to 5 feet. Swell east 3 feet. Scattered showers.


Big Island Leeward Waters-
Aug 21, 2017 3:25 pm HST

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TONIGHT:
West of the Big Island, northwest winds 10 knots veering north after midnight. Near South Point, northeast winds 20 knots. Wind waves 5 feet. Swell east 3 feet. Haze. Isolated heavy showers.

TUESDAY:
Winds variable less than 10 knots west of the Big Island, east 20 knots near South Point. Wind waves 6 feet. Swell east 3 feet. Haze through the day. Scattered heavy showers in the morning. Isolated showers in the afternoon.

TUESDAY NIGHT:
Winds variable less than 10 knots west of the Big Island, east 20 knots near South Point. Wind waves 6 feet. South swell 3 feet after midnight. Swell east 3 feet. Haze. Isolated showers.

WEDNESDAY:
West of the Big Island, winds variable less than 10 knots becoming west 10 knots in the afternoon. Near South Point, east winds 20 knots. Wind waves 9 feet. South swell 3 feet and east 3 to 4 feet. Isolated showers in the morning. Haze through the day.

WEDNESDAY NIGHT:
West winds 10 knots west of the Big Island, east to 25 knots near South Point. Wind waves 9 feet. South swell 3 feet and east 4 feet. Haze.

THURSDAY:
Winds variable less than 10 knots west of the Big Island, east to 25 knots near South Point. Wind waves 9 feet. Mixed swell southeast 3 feet and northeast 4 feet. Haze.

THURSDAY NIGHT:
Winds variable less than 10 knots west of the Big Island, east to 25 knots near South Point. Wind waves 8 feet. Southeast swell 3 feet and east 4 feet. Haze.

FRIDAY:
Winds variable less than 10 knots west of the Big Island, east 20 knots near South Point. Wind waves 7 to 8 feet. Southeast swell 3 feet and east 3 to 4 feet. Haze.

SATURDAY:
Winds variable less than 10 knots west of the Big Island, east 20 knots near South Point. Wind waves 7 feet. Swell east 3 feet. Haze. Isolated showers.


Big Island Southeast Waters-
Aug 21, 2017 3:25 pm HST

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TONIGHT:
Northeast winds 20 knots. Wind waves 5 feet. Swell east 3 feet. Scattered heavy showers in the evening, then heavy showers likely after midnight.

TUESDAY:
Northeast winds 20 knots. Wind waves 6 feet. Swell east 3 feet. Heavy showers likely in the morning, then scattered heavy showers in the afternoon.

TUESDAY NIGHT:
Northeast winds to 25 knots. Wind waves 6 feet. Southeast swell 3 feet after midnight. Swell east 3 feet. Scattered showers.

WEDNESDAY:
Northeast winds to 25 knots. Wind waves 9 feet. Southeast swell 3 feet and east 4 feet. Scattered showers.

WEDNESDAY NIGHT:
Northeast winds to 25 knots. Wind waves 9 feet. South swell 3 feet and east 4 feet. Isolated showers after midnight.

THURSDAY:
East winds to 25 knots. Wind waves 8 feet. Southeast swell 3 feet and east 4 feet. Isolated showers in the morning.

THURSDAY NIGHT:
Northeast winds to 25 knots. Wind waves 8 feet. Southeast swell 3 feet and east 4 feet. Isolated showers after midnight.

FRIDAY:
Northeast winds to 25 knots. Wind waves 7 to 8 feet. Southeast swell 3 feet and east 3 to 4 feet. Isolated showers.

SATURDAY:
Northeast winds 20 knots. Wind waves 7 to 9 feet. Swell east 3 feet. Scattered showers.