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Oahu Surf Observation and Forecast/Coastal Forecast for Hawaiian Waters

425
FZHW50 PHFO 211334
CWFHFO

Coastal Waters Forecast
National Weather Service Honolulu HI
334 AM HST Wed Apr 21 2021

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

PHZ100-220245-
334 AM HST Wed Apr 21 2021

.Synopsis for Hawaiian coastal waters...
A surface trough northwest of Kauai will gradually dissipate
through Friday. A surface high passing north of the islands
Thursday through Friday will bring a boost to the trade winds with
locally strong trades over the eastern half of the island chain.

$$

PHZ110-220245-
Kauai Northwest Waters-
334 AM HST Wed Apr 21 2021

.TODAY...Winds variable less than 10 knots. Wind waves 3 feet.
Northwest swell 3 feet. Isolated showers in the morning, then
scattered showers in the afternoon.
.TONIGHT...East winds 10 knots in the evening becoming variable
less than 10 knots. Wind waves 3 feet. Northwest swell 5 feet.
Scattered showers.
.THURSDAY...East winds 10 knots. Wind waves 4 feet. Northwest
swell 5 feet. Scattered showers.
.THURSDAY NIGHT...East winds 15 knots. Wind waves 4 feet.
Northwest swell 4 feet. Isolated showers.
.FRIDAY...East winds 15 knots. Wind waves 6 feet. North swell
4 feet. Isolated showers.
.FRIDAY NIGHT...East winds 20 knots. Wind waves 6 feet. North
swell 4 feet. Scattered showers.
.SATURDAY...East winds 20 knots. Wind waves 6 to 7 feet. North
swell 3 to 4 feet. Scattered showers.
.SUNDAY...East winds 15 knots. Wind waves 5 feet. North swell
3 feet. Scattered showers.

$$

PHZ111-220245-
Kauai Windward Waters-
334 AM HST Wed Apr 21 2021

.TODAY...East winds 10 knots. Wind waves 3 feet. Northwest swell
3 feet. Isolated showers.
.TONIGHT...East winds 10 knots. Wind waves 4 feet. Northwest
swell 5 feet. Scattered showers.
.THURSDAY...East winds 10 knots. Wind waves 4 feet. Northwest
swell 5 feet. Scattered showers.
.THURSDAY NIGHT...East winds 15 knots. Wind waves 5 feet.
Northwest swell 4 feet. Isolated showers.
.FRIDAY...East winds 15 knots. Wind waves 6 feet. Northwest swell
4 feet. Isolated showers.
.FRIDAY NIGHT...East winds 15 knots. Wind waves 6 feet. North
swell 4 feet. Scattered showers.
.SATURDAY...East winds 15 knots. Wind waves 6 to 7 feet. North
swell 3 to 4 feet. Scattered showers.
.SUNDAY...East winds 15 knots. Wind waves 4 to 5 feet. North
swell 3 feet. Scattered showers.

$$

PHZ112-220245-
Kauai Leeward Waters-
334 AM HST Wed Apr 21 2021

.TODAY...Northeast winds 10 knots in the morning becoming
variable less than 10 knots. Wind waves 2 feet or less. Northwest
swell 3 feet. Isolated showers in the afternoon.
.TONIGHT...Northeast winds 10 knots. Wind waves 2 feet or less.
Northwest swell 5 feet. Isolated showers.
.THURSDAY...East winds 10 knots. Wind waves 3 feet. Northwest
swell 5 feet. Isolated showers through the day.
.THURSDAY NIGHT...East winds 15 knots. Wind waves 4 feet.
Northwest swell 4 feet. Isolated showers.
.FRIDAY...East winds 15 knots. Wind waves 5 feet. North swell
4 feet. Isolated showers.
.FRIDAY NIGHT...East winds 20 knots. Wind waves 6 feet. North
swell 4 feet. Isolated showers.
.SATURDAY...East winds 20 knots. Wind waves 7 feet. North swell
3 to 4 feet. Isolated showers.
.SUNDAY...East winds 15 knots. Wind waves 5 to 6 feet. North
swell 3 feet. Isolated showers.

$$

PHZ113-220245-
Kauai Channel-
334 AM HST Wed Apr 21 2021

.TODAY...Northeast winds 10 knots. Wind waves 3 feet in the
morning then 2 feet or less. Northwest swell 3 feet. Isolated
showers through the day.
.TONIGHT...Northeast winds 10 knots. Wind waves 4 feet. Northwest
swell 5 feet. Isolated showers.
.THURSDAY...East winds 15 knots. Wind waves 4 feet. Northwest
swell 5 feet. Isolated showers through the day.
.THURSDAY NIGHT...East winds 15 knots. Wind waves 5 feet.
Northwest swell 4 feet. Isolated showers.
.FRIDAY...East winds 15 knots. Wind waves 6 feet. North swell
4 feet. Isolated showers.
.FRIDAY NIGHT...East winds 20 knots. Wind waves 6 feet. North
swell 4 feet. Isolated showers.
.SATURDAY...East winds 20 knots. Wind waves 7 feet. North swell
3 to 4 feet. Isolated showers.
.SUNDAY...East winds 15 knots. Wind waves 5 feet. North swell
3 feet. Isolated showers.

$$

PHZ114-220245-
Oahu Windward Waters-
334 AM HST Wed Apr 21 2021

.TODAY...East winds 10 knots. Wind waves 3 feet. Northwest swell
3 feet. Isolated showers.
.TONIGHT...East winds 10 knots. Wind waves 4 feet. Northwest
swell 5 feet. Isolated showers.
.THURSDAY...East winds 15 knots. Wind waves 5 feet. Northwest
swell 5 feet. Isolated showers.
.THURSDAY NIGHT...East winds 15 knots. Wind waves 5 feet.
Northwest swell 4 feet. Isolated showers.
.FRIDAY...East winds 15 knots. Wind waves 6 feet. Northwest swell
4 feet. Isolated showers.
.FRIDAY NIGHT...East winds 20 knots. Wind waves 7 feet. North
swell 4 feet. Scattered showers.
.SATURDAY...East winds 20 knots. Wind waves 7 feet. North swell
3 to 4 feet. Scattered showers.
.SUNDAY...East winds 15 knots. Wind waves 5 feet. North swell
3 feet. Scattered showers.

$$

PHZ115-220245-
Oahu Leeward Waters-
334 AM HST Wed Apr 21 2021

.TODAY...Northeast winds 10 knots. Wind waves 2 feet or less.
Northwest swell 3 feet in the afternoon. Isolated showers in the
afternoon.
.TONIGHT...Northeast winds 10 knots in the evening becoming
variable less than 10 knots. Wind waves 2 feet or less. Northwest
swell 4 feet. Isolated showers.
.THURSDAY...East winds 15 knots. Wind waves 3 feet. Northwest
swell 4 feet. Isolated showers in the morning.
.THURSDAY NIGHT...East winds 15 knots. Wind waves 4 feet.
Northwest swell 4 feet. Isolated showers.
.FRIDAY...East winds 15 knots. Wind waves 5 feet. Northwest swell
3 feet. Isolated showers.
.FRIDAY NIGHT...East winds 20 knots. Wind waves 6 feet. Northwest
swell 3 feet. Isolated showers.
.SATURDAY...East winds 15 knots. Wind waves 6 feet. Northwest
swell 3 to 4 feet. Isolated showers.
.SUNDAY...East winds 15 knots. Wind waves 4 to 5 feet. Northwest
swell 3 feet. Isolated showers.

$$

PHZ116-220245-
Kaiwi Channel-
334 AM HST Wed Apr 21 2021

.TODAY...Northeast winds 10 knots. Wind waves 3 feet. Northwest
swell 3 feet in the afternoon. Isolated showers.
.TONIGHT...East winds 10 knots. Wind waves 4 feet. Northwest
swell 4 feet. Isolated showers.
.THURSDAY...East winds 15 knots. Wind waves 5 feet. Northwest
swell 5 feet. Isolated showers through the day.
.THURSDAY NIGHT...East winds 15 knots. Wind waves 5 feet.
Northwest swell 4 feet. Isolated showers.
.FRIDAY...East winds 20 knots. Wind waves 6 feet. Northwest swell
4 feet. Isolated showers.
.FRIDAY NIGHT...East winds 20 knots. Wind waves 7 feet. North
swell 4 feet. Isolated showers.
.SATURDAY...East winds 20 knots. Wind waves 6 to 7 feet. North
swell 3 to 4 feet. Isolated showers.
.SUNDAY...East winds 15 knots. Wind waves 5 to 6 feet. North
swell 3 feet. Isolated showers.

$$

PHZ117-220245-
Maui County Windward Waters-
334 AM HST Wed Apr 21 2021

.TODAY...East winds 15 knots. Wind waves 4 feet. Northwest swell
3 feet in the afternoon. Isolated showers.
.TONIGHT...East winds 15 knots. Wind waves 4 feet. Northwest
swell 4 feet. Isolated showers in the evening, then scattered
showers after midnight.
.THURSDAY...East winds 15 knots. Wind waves 5 feet. Northwest
swell 5 feet. Isolated showers.
.THURSDAY NIGHT...East winds 15 knots. Wind waves 5 feet.
Northwest swell 4 feet. Scattered showers.
.FRIDAY...East winds 20 knots. Wind waves 6 feet. Northwest swell
4 feet. Scattered showers in the morning, then isolated showers
in the afternoon.
.FRIDAY NIGHT...East winds 20 knots. Wind waves 7 feet. Northwest
swell 4 feet. Scattered showers.
.SATURDAY...East winds 20 knots. Wind waves 6 to 7 feet. North
swell 3 to 4 feet. Scattered showers.
.SUNDAY...East winds 15 knots. Wind waves 5 feet. North swell
3 feet. Scattered showers.

$$

PHZ118-220245-
Maui County Leeward Waters-
334 AM HST Wed Apr 21 2021

.TODAY...East winds 15 knots in the morning becoming variable
less than 10 knots. Wind waves 3 feet in the morning then 2 feet
or less. Isolated showers in the afternoon.
.TONIGHT...Southeast winds 10 knots backing northeast after
midnight. Wind waves 2 feet or less then 3 feet after midnight.
Northwest swell 3 feet. Isolated showers.
.THURSDAY...East winds 10 knots. Wind waves 4 feet. Northwest
swell 3 feet. Isolated showers in the morning.
.THURSDAY NIGHT...Northeast winds 15 knots. Wind waves 4 feet.
Northwest swell 3 feet. Isolated showers.
.FRIDAY...East winds 15 knots. Wind waves 5 feet. Northwest swell
3 feet. Isolated showers.
.FRIDAY NIGHT...Northeast winds 15 knots. Wind waves 6 feet.
North swell 3 feet. Isolated showers.
.SATURDAY...East winds 15 knots. Wind waves 5 feet. North swell
3 feet. Isolated showers.
.SUNDAY...East winds 15 knots. Wind waves 4 feet. Isolated
showers.

$$

PHZ119-220245-
Maalaea Bay-
334 AM HST Wed Apr 21 2021

.TODAY...Winds variable less than 10 knots. Wind waves 2 feet or
less.
.TONIGHT...Winds variable less than 10 knots. Wind waves 2 feet
or less.
.THURSDAY...Northeast winds 10 knots. Wind waves 2 feet or less.
.THURSDAY NIGHT...North winds to 25 knots. Wind waves 2 feet or
less.
.FRIDAY...Northeast winds to 25 knots. Wind waves 2 feet or less
then 3 feet in the afternoon.
.FRIDAY NIGHT...Northeast winds to 25 knots. Wind waves 3 feet.
.SATURDAY...North winds to 25 knots. Wind waves 3 feet.
.SUNDAY...Northeast winds 20 knots. Wind waves 2 feet or less.

$$

PHZ120-220245-
Pailolo Channel-
334 AM HST Wed Apr 21 2021

.TODAY...East winds 10 knots. Wind waves 3 feet. Isolated
showers.
.TONIGHT...East winds 10 knots. Wind waves 4 feet. Northwest
swell 3 feet. Isolated showers.
.THURSDAY...East winds 20 knots. Wind waves 5 feet. Northwest
swell 4 feet. Isolated showers in the morning.
.THURSDAY NIGHT...East winds to 25 knots. Wind waves 5 feet.
Northwest swell 4 feet. Isolated showers.
.FRIDAY...East winds to 25 knots. Wind waves 6 feet. Northwest
swell 3 feet. Isolated showers.
.FRIDAY NIGHT...East winds to 25 knots. Wind waves 6 feet.
Northwest swell 3 feet. Isolated showers in the evening.
Scattered showers after midnight.
.SATURDAY...East winds to 25 knots. Wind waves 6 feet. North
swell 3 feet. Isolated showers.
.SUNDAY...East winds 20 knots. Wind waves 5 to 6 feet. North
swell 3 feet. Isolated showers.

$$

PHZ121-220245-
Alenuihaha Channel-
334 AM HST Wed Apr 21 2021

.TODAY...East winds 15 knots. Wind waves 4 feet. Isolated
showers.
.TONIGHT...East winds 20 knots. Wind waves 4 feet. Northwest
swell 3 feet. Isolated showers.
.THURSDAY...East winds 20 knots. Wind waves 6 feet. Northwest
swell 4 feet. Isolated showers.
.THURSDAY NIGHT...East winds to 25 knots. Wind waves 6 feet.
Northwest swell 4 feet. Isolated showers.
.FRIDAY...East winds to 25 knots. Wind waves 7 feet. Northwest
swell 4 feet. Isolated showers.
.FRIDAY NIGHT...East winds to 25 knots. Wind waves 7 feet.
Northwest swell 3 feet. Isolated showers.
.SATURDAY...East winds to 25 knots. Wind waves 7 feet. North
swell 3 feet. Isolated showers.
.SUNDAY...East winds 20 knots. Wind waves 6 to 7 feet. Northwest
swell 3 feet. Isolated showers.

$$

PHZ122-220245-
Big Island Windward Waters-
334 AM HST Wed Apr 21 2021

.TODAY...East winds 15 knots. Wind waves 4 feet. Isolated
showers.
.TONIGHT...East winds 10 knots. Wind waves 4 feet. Northwest
swell 3 feet. Isolated showers in the evening, then scattered
showers after midnight.
.THURSDAY...East winds 15 knots. Wind waves 5 feet. Northwest
swell 4 feet. Isolated showers.
.THURSDAY NIGHT...East winds 15 knots. Wind waves 5 feet.
Northwest swell 4 feet. Scattered showers.
.FRIDAY...East winds 20 knots. Wind waves 5 feet. Northwest swell
4 feet. Scattered showers in the morning, then isolated showers
in the afternoon.
.FRIDAY NIGHT...East winds 15 knots. Wind waves 5 feet. Northwest
swell 3 feet. Scattered showers.
.SATURDAY...East winds 15 knots. Wind waves 5 feet. North swell
3 feet. Scattered showers.
.SUNDAY...East winds 15 knots. Wind waves 5 feet. North swell
3 feet. Scattered showers.

$$

PHZ123-220245-
Big Island Leeward Waters-
334 AM HST Wed Apr 21 2021

.TODAY...Northwest winds 10 knots west of the Big Island...east
15 knots near South Point. Wind waves 4 feet.
.TONIGHT...Northeast winds 15 knots veering southeast after
midnight. Wind waves 5 feet. Isolated showers.
.THURSDAY...Winds variable less than 10 knots west of the Big
Island...east 20 knots near South Point. Wind waves 6 feet.
Northwest swell 3 feet. Isolated showers in the morning.
.THURSDAY NIGHT...Winds variable less than 10 knots west of the
Big Island...east to 25 knots near South Point. Wind waves
6 feet. Northwest swell 3 feet. Isolated showers.
.FRIDAY...Winds variable less than 10 knots west of the Big
Island...east to 25 knots near South Point. Wind waves 7 feet.
Northwest swell 3 feet. Isolated showers through the day.
.FRIDAY NIGHT...Winds variable less than 10 knots west of the Big
Island...east to 25 knots near South Point. Wind waves 7 feet.
Northwest swell 3 feet in the evening. Isolated showers.
.SATURDAY...Winds variable less than 10 knots west of the Big
Island...east to 25 knots near South Point. Wind waves 7 to
8 feet. Isolated showers.
.SUNDAY...West of the Big Island, winds variable less than
10 knots becoming east 10 knots in the evening, then becoming
variable less than 10 knots after midnight. Near South Point,
east winds 20 knots. Wind waves 6 feet. Isolated showers.

$$

PHZ124-220245-
Big Island Southeast Waters-
334 AM HST Wed Apr 21 2021

.TODAY...East winds 15 knots. Wind waves 4 feet. Isolated showers
through the day.
.TONIGHT...East winds 15 knots. Wind waves 5 feet. Isolated
showers.
.THURSDAY...East winds 20 knots. Wind waves 6 feet. Northwest
swell 3 feet. Isolated showers through the day.
.THURSDAY NIGHT...East winds to 25 knots. Wind waves 6 feet.
Northwest swell 3 feet. Isolated showers.
.FRIDAY...Northeast winds to 25 knots. Wind waves 7 feet.
Northwest swell 3 feet. Isolated showers.
.FRIDAY NIGHT...Northeast winds to 25 knots. Wind waves 7 feet.
Northwest swell 3 feet. Isolated showers in the evening, then
scattered showers after midnight.
.SATURDAY...East winds to 25 knots. Wind waves 6 to 7 feet.
Northwest swell 3 feet. Isolated showers.
.SUNDAY...East winds 20 knots. Wind waves 6 feet. Northwest swell
3 feet. Isolated showers.

$$

Bulletins, Forecasts and Observations are courtesy of Honolulu National Weather Service Forecast Office



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