Coastal Waters Forecast
Issued by NWS Honolulu, HI

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000
FZHW50 PHFO 191914
CWFHFO

Coastal Waters Forecast
National Weather Service Honolulu HI
914 AM HST Thu Apr 19 2018

Hawaiian coastal waters within 40 nautical miles including the
Hawaiian Islands Humpback Whale National Marine Sanctuary.

PHZ100-200730-
914 AM HST Thu Apr 19 2018

.Synopsis for Hawaiian coastal waters...
Surface high pressure far north of the islands will maintain
strong and gusty trade winds into early next week. An upper-level
disturbance will produce locally heavy downpours and a slight
chance of thunderstorms through Friday.

$$

PHZ110-200730-
Kauai Northwest Waters-
914 AM HST Thu Apr 19 2018

.REST OF TODAY...East winds 20 knots. Wind waves around 7 feet.
Northwest swell 4 feet. Isolated showers. A slight chance of
thunderstorms. Scattered heavy showers this afternoon.
.TONIGHT...East winds 20 knots. Wind waves around 7 feet.
Northwest swell 5 feet. Scattered heavy showers in the evening,
then isolated showers after midnight.
.FRIDAY...East winds 20 knots. Wind waves around 7 feet.
Northwest swell 5 feet. Isolated showers.
.FRIDAY NIGHT...East winds 20 knots. Wind waves around 6 feet.
Northwest swell 4 feet. Scattered showers, mainly in the evening.
.SATURDAY...East winds 20 knots. Wind waves around 6 feet.
Northwest swell 4 feet. Isolated showers in the morning, then
scattered showers in the afternoon.
.SATURDAY NIGHT...East winds 20 knots. Wind waves around 6 feet.
Northwest swell 4 feet. Scattered showers, mainly in the evening.
.SUNDAY...East winds 20 knots. Wind waves 6 to 7 feet. Northwest
swell 4 to 6 feet. Scattered showers.
.MONDAY...East winds 20 knots. Wind waves 7 to 9 feet. Northwest
swell 4 to 6 feet. Scattered showers.

$$

PHZ111-200730-
Kauai Windward Waters-
914 AM HST Thu Apr 19 2018

.REST OF TODAY...East winds 20 knots. Wind waves around 7 feet.
Northwest swell 3 feet. Isolated showers. A slight chance of
thunderstorms. Scattered heavy showers this afternoon.
.TONIGHT...East winds 20 knots. Wind waves around 7 feet.
Northwest swell 4 feet. Scattered heavy showers.
.FRIDAY...East winds 20 knots. Wind waves around 7 feet.
Northwest swell 4 feet. Scattered showers, mainly in the morning.
.FRIDAY NIGHT...East winds 15 knots. Wind waves around 6 feet.
Northwest swell 4 feet. Scattered showers, mainly in the evening.
.SATURDAY...East winds 15 knots. Wind waves around 6 feet.
Northwest swell 4 feet. Isolated showers in the morning, then
scattered showers in the afternoon.
.SATURDAY NIGHT...East winds 20 knots. Wind waves around 6 feet.
Northwest swell 4 feet. Scattered showers.
.SUNDAY...East winds 20 knots. Wind waves around 7 feet.
Northwest swell 4 to 6 feet. Scattered showers.
.MONDAY...East winds 20 knots. Wind waves 7 to 9 feet. Northwest
swell 4 to 6 feet. Scattered showers.

$$

PHZ112-200730-
Kauai Leeward Waters-
914 AM HST Thu Apr 19 2018

.REST OF TODAY...East winds 20 knots. Wind waves around 7 feet.
Northwest swell 4 feet. Scattered heavy showers and a slight
chance of thunderstorms.
.TONIGHT...East winds 20 knots. Wind waves around 6 feet.
Northwest swell 4 feet. Scattered heavy showers in the evening,
then isolated showers after midnight.
.FRIDAY...East winds 20 knots. Wind waves around 7 feet.
Northwest swell 5 feet. Isolated showers.
.FRIDAY NIGHT...East winds 20 knots. Wind waves around 6 feet.
Northwest swell 4 feet. Isolated showers.
.SATURDAY...Northeast winds 20 knots...northeast 10 knots in the
Kaulakahi Channel. Wind waves around 6 feet. Northwest swell
4 feet. Isolated showers.
.SATURDAY NIGHT...East winds 20 knots. Wind waves around 7 feet.
Northwest swell 4 feet. Isolated showers.
.SUNDAY...East winds 20 knots...east 15 knots in the Kaulakahi
Channel. Wind waves around 8 feet. Northwest swell 4 to 6 feet.
Isolated showers.
.MONDAY...East winds to 25 knots. Wind waves 8 to 9 feet.
Northwest swell 4 to 6 feet. Isolated showers.

$$

PHZ113-200730-
Kauai Channel-
914 AM HST Thu Apr 19 2018

.REST OF TODAY...East winds 20 knots. Wind waves around 7 feet.
Northwest swell 3 feet. Scattered heavy showers and a slight
chance of thunderstorms.
.TONIGHT...East winds 20 knots. Wind waves around 6 feet.
Northwest swell 4 feet. Heavy showers likely in the evening. A
slight chance of thunderstorms. Scattered heavy showers after
midnight.
.FRIDAY...Northeast winds 20 knots. Wind waves around 7 feet.
Northwest swell 4 feet. Scattered showers, mainly in the morning.
.FRIDAY NIGHT...Northeast winds 20 knots. Wind waves around
6 feet. Northwest swell 4 feet. Isolated showers.
.SATURDAY...Northeast winds 20 knots. Wind waves around 6 feet.
Northwest swell 4 feet. Isolated showers.
.SATURDAY NIGHT...East winds 20 knots. Wind waves around 7 feet.
Northwest swell 4 feet. Isolated showers.
.SUNDAY...Northeast winds 20 knots. Wind waves around 8 feet.
Northwest swell 4 to 5 feet. Isolated showers.
.MONDAY...Northeast winds to 25 knots. Wind waves 8 to 9 feet.
Northwest swell 4 to 5 feet. Isolated showers.

$$

PHZ114-200730-
Oahu Windward Waters-
914 AM HST Thu Apr 19 2018

.REST OF TODAY...East winds 20 knots. Wind waves around 7 feet.
Northwest swell 3 feet. Scattered heavy showers. A slight chance
of thunderstorms. Heavy showers likely this afternoon.
.TONIGHT...East winds 20 knots. Wind waves around 7 feet.
Northwest swell 4 feet. Heavy showers likely in the evening. A
slight chance of thunderstorms. Scattered heavy showers after
midnight.
.FRIDAY...East winds 20 knots. Wind waves around 7 feet.
Northwest swell 5 feet. Scattered showers.
.FRIDAY NIGHT...East winds 20 knots. Wind waves around 6 feet.
Northwest swell 4 feet. Scattered showers.
.SATURDAY...East winds 20 knots. Wind waves around 7 feet.
Northwest swell 4 feet. Scattered showers.
.SATURDAY NIGHT...East winds 20 knots. Wind waves around 7 feet.
Northwest swell 4 feet. Scattered showers.
.SUNDAY...East winds 20 knots. Wind waves around 7 feet.
Northwest swell 4 to 5 feet. Scattered showers.
.MONDAY...East winds 20 knots. Wind waves 7 to 9 feet. Northwest
swell 5 feet. Scattered showers.

$$

PHZ115-200730-
Oahu Leeward Waters-
914 AM HST Thu Apr 19 2018

.REST OF TODAY...East winds 20 knots. Wind waves around 7 feet.
Northwest swell 3 feet. Scattered heavy showers. A slight chance
of thunderstorms. Heavy showers likely this afternoon.
.TONIGHT...East winds 20 knots. Wind waves around 6 feet.
Northwest swell 3 feet. Heavy showers likely and a slight chance
of thunderstorms.
.FRIDAY...East winds 20 knots. Wind waves around 7 feet.
Northwest swell 4 feet. Showers likely, mainly in the morning.
.FRIDAY NIGHT...Northeast winds 20 knots. Wind waves around
6 feet. Northwest swell 4 feet. Isolated showers.
.SATURDAY...Northeast winds 20 knots. Wind waves around 5 feet.
Northwest swell 4 feet. Isolated showers.
.SATURDAY NIGHT...Northeast winds 20 knots. Wind waves around
7 feet. Northwest swell 4 feet. Isolated showers.
.SUNDAY...Northeast winds 20 knots. Wind waves around 8 feet.
Northwest swell 3 to 5 feet. Isolated showers.
.MONDAY...Northeast winds 20 knots. Wind waves 7 to 8 feet.
Northwest swell 4 to 5 feet. Isolated showers.

$$

PHZ116-200730-
Kaiwi Channel-
914 AM HST Thu Apr 19 2018

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE THIS AFTERNOON...

.REST OF TODAY...East winds to 25 knots. Wind waves around
8 feet. Northwest swell 3 feet. Scattered heavy showers. A slight
chance of thunderstorms. Heavy showers likely this afternoon.
.TONIGHT...East winds 20 knots. Wind waves around 7 feet.
Northwest swell 4 feet. Heavy showers likely and a slight chance
of thunderstorms.
.FRIDAY...East winds 20 knots. Wind waves around 7 feet.
Northwest swell 5 feet. Heavy showers likely in the morning, then
scattered showers in the afternoon.
.FRIDAY NIGHT...Northeast winds 20 knots. Wind waves around
6 feet. Northwest swell 4 feet. Isolated showers.
.SATURDAY...East winds 20 knots. Wind waves around 7 feet.
Northwest swell 4 feet. Isolated showers.
.SATURDAY NIGHT...East winds 20 knots. Wind waves around 7 feet.
Northwest swell 4 feet. Isolated showers.
.SUNDAY...Northeast winds 20 knots. Wind waves around 8 feet.
Northwest swell 4 to 5 feet. Isolated showers.
.MONDAY...Northeast winds 20 knots. Wind waves 7 to 9 feet.
Northwest swell 5 feet. Scattered showers.

$$

PHZ117-200730-
Maui County Windward Waters-
914 AM HST Thu Apr 19 2018

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE THIS AFTERNOON...

.REST OF TODAY...East winds to 25 knots. Wind waves around
8 feet. Northwest swell 3 feet. Scattered heavy showers. A slight
chance of thunderstorms. Heavy showers likely this afternoon.
.TONIGHT...East winds 20 knots. Wind waves around 7 feet.
Northwest swell 4 feet. Heavy showers likely and a slight chance
of thunderstorms.
.FRIDAY...East winds 20 knots. Wind waves around 7 feet.
Northwest swell 5 feet. Heavy showers likely in the morning, then
scattered showers in the afternoon.
.FRIDAY NIGHT...East winds 20 knots. Wind waves around 6 feet.
Northwest swell 4 feet. Scattered showers.
.SATURDAY...East winds 20 knots. Wind waves around 7 feet.
Northwest swell 4 feet. Scattered showers.
.SATURDAY NIGHT...East winds 20 knots. Wind waves around 7 feet.
Northwest swell 4 feet. Scattered showers.
.SUNDAY...East winds 20 knots. Wind waves around 7 feet.
Northwest swell 4 to 5 feet. Scattered showers.
.MONDAY...East winds 20 knots. Wind waves 7 to 9 feet. Northwest
swell 5 feet. Scattered showers.

$$

PHZ118-200730-
Maui County Leeward Waters-
914 AM HST Thu Apr 19 2018

.REST OF TODAY...East winds 20 knots. Wind waves around 7 feet.
Scattered heavy showers. A slight chance of thunderstorms. Heavy
showers likely this afternoon.
.TONIGHT...East winds 20 knots. Wind waves around 7 feet.
Northwest swell 3 feet. Heavy showers likely and a slight chance
of thunderstorms.
.FRIDAY...East winds 20 knots. Wind waves around 7 feet.
Northwest swell 3 feet. Heavy showers likely in the morning, then
scattered showers in the afternoon.
.FRIDAY NIGHT...Northeast winds 15 knots. Wind waves around
5 feet. Northwest swell 3 feet. Isolated showers.
.SATURDAY...Northeast winds 15 knots. Wind waves around 6 feet.
Northwest swell 3 feet. Isolated showers.
.SATURDAY NIGHT...Northeast winds 15 knots. Wind waves around
6 feet. Northwest swell 3 feet. Isolated showers.
.SUNDAY...Northeast winds 20 knots. Wind waves 6 to 7 feet.
Northwest swell 3 to 4 feet. Isolated showers.
.MONDAY...Northeast winds 15 knots. Wind waves 6 to 7 feet.
Northwest swell 3 to 4 feet. Isolated showers.

$$

PHZ119-200730-
Maalaea Bay-
914 AM HST Thu Apr 19 2018

...SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY AFTERNOON...

.REST OF TODAY...North winds to 25 knots. Wind waves around
3 feet. Scattered heavy showers and a slight chance of
thunderstorms.
.TONIGHT...North winds to 25 knots. Wind waves around 3 feet.
Heavy showers likely in the evening. A slight chance of
thunderstorms. Scattered heavy showers after midnight.
.FRIDAY...North winds to 25 knots. Wind waves around 3 feet.
Scattered heavy showers.
.FRIDAY NIGHT...North winds to 25 knots. Wind waves around
3 feet. Isolated showers after midnight.
.SATURDAY...North winds to 25 knots. Wind waves around 3 feet.
Isolated showers.
.SATURDAY NIGHT...North winds to 25 knots. Wind waves around
3 feet. Isolated showers in the evening.
.SUNDAY...North winds to 25 knots. Wind waves around 3 feet.
.MONDAY...North winds to 25 knots. Wind waves around 3 feet.

$$

PHZ120-200730-
Pailolo Channel-
914 AM HST Thu Apr 19 2018

...SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY AFTERNOON...

.REST OF TODAY...East winds to 25 knots. Wind waves around
8 feet. Scattered heavy showers and a slight chance of
thunderstorms.
.TONIGHT...East winds to 25 knots. Wind waves around 7 feet.
Northwest swell 3 feet. Heavy showers likely in the evening. A
slight chance of thunderstorms. Scattered heavy showers after
midnight.
.FRIDAY...East winds to 25 knots. Wind waves around 7 feet.
Northwest swell 3 feet. Scattered heavy showers.
.FRIDAY NIGHT...Northeast winds 20 knots. Wind waves around
5 feet. Northwest swell 3 feet. Isolated showers.
.SATURDAY...East winds to 25 knots. Wind waves around 6 feet.
Northwest swell 3 feet. Isolated showers in the morning, then
scattered showers in the afternoon.
.SATURDAY NIGHT...East winds to 25 knots. Wind waves around
7 feet. North swell 3 feet. Scattered showers, mainly in the
evening.
.SUNDAY...Northeast winds to 25 knots. Wind waves around 7 feet.
Northwest swell 3 to 4 feet. Isolated showers.
.MONDAY...Northeast winds to 25 knots. Wind waves 6 to 8 feet.
Northwest swell 3 to 4 feet. Isolated showers.

$$

PHZ121-200730-
Alenuihaha Channel-
914 AM HST Thu Apr 19 2018

...SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY AFTERNOON...

.REST OF TODAY...East winds to 25 knots. Wind waves around
8 feet. Northwest swell 3 feet. Scattered heavy showers and a
slight chance of thunderstorms.
.TONIGHT...East winds to 25 knots. Wind waves around 8 feet.
Northwest swell 3 feet. Heavy showers likely in the evening. A
slight chance of thunderstorms. Scattered heavy showers after
midnight.
.FRIDAY...East winds to 25 knots. Wind waves around 8 feet.
Northwest swell 4 feet. Scattered heavy showers and a slight
chance of thunderstorms.
.FRIDAY NIGHT...East winds to 25 knots. Wind waves around 6 feet.
Northwest swell 4 feet. Hazy. Isolated showers.
.SATURDAY...East winds to 25 knots. Wind waves around 8 feet.
Northwest swell 4 feet. Hazy. Isolated showers.
.SATURDAY NIGHT...East winds to 25 knots. Wind waves around
8 feet. Northwest swell 4 feet. Hazy. Isolated showers.
.SUNDAY...Northeast winds to 25 knots. Wind waves around 9 feet.
Northwest swell 4 to 5 feet. Hazy. Isolated showers.
.MONDAY...East winds to 25 knots. Wind waves 8 to 9 feet.
Northwest swell 5 feet. Hazy. Isolated showers.

$$

PHZ122-200730-
Big Island Windward Waters-
914 AM HST Thu Apr 19 2018

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE THIS AFTERNOON...

.REST OF TODAY...East winds 20 knots. Wind waves around 7 feet.
Northwest swell 3 feet. Heavy showers likely and a slight chance
of thunderstorms.
.TONIGHT...East winds 20 knots. Wind waves around 6 feet.
Northwest swell 4 feet. Occasional heavy showers and a slight
chance of thunderstorms.
.FRIDAY...East winds 20 knots. Wind waves around 6 feet.
Northwest swell 5 feet. Occasional heavy showers and a slight
chance of thunderstorms.
.FRIDAY NIGHT...East winds 15 knots. Wind waves around 5 feet.
Northwest swell 4 feet. Scattered showers.
.SATURDAY...East winds 20 knots. Wind waves around 7 feet.
Northwest swell 4 feet. Scattered showers.
.SATURDAY NIGHT...East winds 20 knots. Wind waves around 7 feet.
Northwest swell 4 feet. Scattered showers.
.SUNDAY...Northeast winds 20 knots. Wind waves around 7 feet.
Northwest swell 4 to 5 feet. Scattered showers.
.MONDAY...East winds 20 knots. Wind waves 6 to 7 feet. Northwest
swell 5 feet. Scattered showers.

$$

PHZ123-200730-
Big Island Leeward Waters-
914 AM HST Thu Apr 19 2018

...SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY AFTERNOON...

.REST OF TODAY...West winds 10 knots west of the Big Island...
east to 25 knots near South Point. Wind waves around 8 feet.
Hazy. Scattered heavy showers and a slight chance of
thunderstorms.
.TONIGHT...West of the Big Island, west winds 10 knots in the
evening, becoming variable less than 10 knots. Near South Point,
east winds to 25 knots. Wind waves around 8 feet. Northwest swell
3 feet after midnight. Hazy. Scattered heavy showers and a slight
chance of thunderstorms.
.FRIDAY...Winds variable less than 10 knots west of the Big
Island...east to 25 knots near South Point. Wind waves around
8 feet. Northwest swell 3 feet. Hazy. Scattered heavy showers and
a slight chance of thunderstorms.
.FRIDAY NIGHT...Winds variable less than 10 knots west of the Big
Island...east to 25 knots near South Point. Wind waves around
8 feet. Northwest swell 3 feet. Hazy. Isolated showers.
.SATURDAY...Winds variable less than 10 knots west of the Big
Island...east to 25 knots near South Point. Wind waves around
8 feet. Northwest swell 3 feet. Hazy. Isolated showers.
.SATURDAY NIGHT...Winds variable less than 10 knots west of the
Big Island...east to 25 knots near South Point. Wind waves around
8 feet. Northwest swell 3 feet. Hazy. Isolated showers.
.SUNDAY...West of the Big Island, winds variable less than
10 knots, becoming northeast 10 knots after midnight. Near South
Point, east winds to 25 knots. Wind waves around 9 feet.
Northwest swell 3 feet. Hazy. Isolated showers.
.MONDAY...Winds variable less than 10 knots west of the Big
Island...east to 25 knots near South Point. Wind waves around
9 feet. Northwest swell 3 to 4 feet. Hazy. Isolated showers.

$$

PHZ124-200730-
Big Island Southeast Waters-
914 AM HST Thu Apr 19 2018

...SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY AFTERNOON...

.REST OF TODAY...East winds to 25 knots. Wind waves around
7 feet. Scattered heavy showers and a slight chance of
thunderstorms.
.TONIGHT...Northeast winds to 25 knots. Wind waves around 7 feet.
Northwest swell 3 feet after midnight. Heavy showers likely and a
slight chance of thunderstorms.
.FRIDAY...Northeast winds to 25 knots. Wind waves around 8 feet.
Northwest swell 3 feet. Heavy showers likely and a slight chance
of thunderstorms.
.FRIDAY NIGHT...Northeast winds to 25 knots. Wind waves around
8 feet. Northwest swell 3 feet. Scattered showers.
.SATURDAY...Northeast winds to 25 knots. Wind waves around
8 feet. Northwest swell 3 feet. Scattered showers.
.SATURDAY NIGHT...Northeast winds to 25 knots. Wind waves around
9 feet. Northwest swell 3 feet. Scattered showers.
.SUNDAY...Northeast winds to 25 knots. Wind waves around 9 feet.
Northwest swell 3 feet. Scattered showers.
.MONDAY...Northeast winds to 25 knots. Wind waves around 9 feet.
Northwest swell 3 to 4 feet. Scattered showers.

$$


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