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Oahu Surf Observation and Forecast/Coastal Forecast for Hawaiian Waters

694
FZHW50 PHFO 201926
CWFHFO

Coastal Waters Forecast
National Weather Service Honolulu HI
926 AM HST Tue Apr 20 2021

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

PHZ100-210745-
926 AM HST Tue Apr 20 2021

.Synopsis for Hawaiian coastal waters...
A front approaching from the northwest will keep winds on the
lighter side, particularly over the western islands through
Wednesday. As the front weakens into a trough and dissipates
Wednesday night and Thursday, trade winds will return, and
strengthen to fresh to locally strong levels later in the week.

$$

PHZ110-210745-
Kauai Northwest Waters-
926 AM HST Tue Apr 20 2021

.REST OF TODAY...South winds 10 knots. Wind waves 2 feet or less
then 3 feet in the afternoon. North swell 3 feet. Scattered heavy
showers and slight chance of thunderstorms.
.TONIGHT...Winds variable less than 10 knots. Wind waves 3 feet.
Northwest swell 3 feet after midnight. Scattered showers and
slight chance of thunderstorms in the evening, then isolated
showers after midnight.
.WEDNESDAY...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.
.WEDNESDAY NIGHT...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. Scattered showers.
.SATURDAY...East winds 20 knots. Wind waves 6 to 7 feet. North
swell 3 to 4 feet. Scattered showers.

$$

PHZ111-210745-
Kauai Windward Waters-
926 AM HST Tue Apr 20 2021

.REST OF TODAY...Southeast winds 10 knots becoming variable less
than 10 knots. Wind waves 3 feet. North swell 3 feet. Scattered
heavy showers and slight chance of thunderstorms.
.TONIGHT...Southeast winds 10 knots in the evening becoming
variable less than 10 knots. Wind waves 3 feet. Slight chance of
thunderstorms in the evening. Scattered showers through the
night.
.WEDNESDAY...Winds variable less than 10 knots becoming east
10 knots in the afternoon. Wind waves 3 feet. Northwest swell
3 feet. Isolated showers.
.WEDNESDAY NIGHT...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. 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.

$$

PHZ112-210745-
Kauai Leeward Waters-
926 AM HST Tue Apr 20 2021

.REST OF TODAY...South winds 10 knots. Wind waves 3 feet. North
swell 3 feet. Scattered heavy showers and slight chance of
thunderstorms.
.TONIGHT...Southeast winds 10 knots in the evening becoming
variable less than 10 knots. Wind waves 3 feet. North swell
3 feet after midnight. Scattered showers and slight chance of
thunderstorms in the evening, then isolated showers after
midnight.
.WEDNESDAY...Winds variable less than 10 knots. Wind waves 2 feet
or less. Northwest swell 3 feet. Isolated showers.
.WEDNESDAY NIGHT...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 to 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.

$$

PHZ113-210745-
Kauai Channel-
926 AM HST Tue Apr 20 2021

.REST OF TODAY...Winds variable less than 10 knots. Wind waves
3 feet. North swell 3 feet. Scattered heavy showers and slight
chance of thunderstorms.
.TONIGHT...East winds 15 knots in the evening becoming variable
less than 10 knots. Wind waves 3 feet. Slight chance of
thunderstorms in the evening. Scattered showers through the
night.
.WEDNESDAY...Winds variable less than 10 knots becoming northeast
10 knots in the afternoon. Wind waves 3 feet in the morning then
2 feet or less. Northwest swell 3 feet. Isolated showers.
.WEDNESDAY NIGHT...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.
.SATURDAY...East winds 20 knots. Wind waves 7 feet. North swell
3 to 4 feet. Isolated showers.

$$

PHZ114-210745-
Oahu Windward Waters-
926 AM HST Tue Apr 20 2021

.REST OF TODAY...East winds 10 knots. Wind waves 4 feet. North
swell 3 feet. Scattered heavy showers through the day. Slight
chance of thunderstorms in the afternoon.
.TONIGHT...East winds 10 knots. Wind waves 4 feet. Slight chance
of thunderstorms in the evening. Scattered showers through the
night.
.WEDNESDAY...Winds variable less than 10 knots becoming northeast
10 knots in the afternoon. Wind waves 3 feet. Northwest swell
3 feet. Isolated showers.
.WEDNESDAY NIGHT...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 to 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.

$$

PHZ115-210745-
Oahu Leeward Waters-
926 AM HST Tue Apr 20 2021

.REST OF TODAY...Winds variable less than 10 knots. Wind waves
3 feet. Northwest swell 3 feet. Scattered heavy showers and
slight chance of thunderstorms in the afternoon.
.TONIGHT...Northeast winds 10 knots. Wind waves 2 feet or less
then 3 feet after midnight. Scattered showers and slight chance
of thunderstorms in the evening, then isolated showers after
midnight.
.WEDNESDAY...Northeast winds 10 knots. Wind waves 2 feet or less.
Northwest swell 3 feet in the afternoon. Isolated showers through
the day.
.WEDNESDAY NIGHT...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 to 6 feet. Northwest
swell 3 to 4 feet. Isolated showers.
.SATURDAY...East winds 15 knots. Wind waves 6 feet. Northwest
swell 3 to 4 feet. Isolated showers.

$$

PHZ116-210745-
Kaiwi Channel-
926 AM HST Tue Apr 20 2021

.REST OF TODAY...Northeast winds 10 knots. Wind waves 4 feet.
North swell 3 feet. Scattered showers and slight chance of
thunderstorms in the afternoon.
.TONIGHT...East winds 10 knots. Wind waves 3 feet. Scattered
showers in the evening, then isolated showers after midnight.
.WEDNESDAY...Northeast winds 10 knots. Wind waves 3 feet.
Northwest swell 3 feet in the afternoon. Isolated showers through
the day.
.WEDNESDAY NIGHT...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 to 7 feet. North
swell 3 to 4 feet. Isolated showers.
.SATURDAY...East winds 20 knots. Wind waves 6 to 7 feet. North
swell 3 to 4 feet. Isolated showers.

$$

PHZ117-210745-
Maui County Windward Waters-
926 AM HST Tue Apr 20 2021

.REST OF TODAY...Southeast winds 20 knots. Wind waves 5 feet.
North swell 3 feet. Isolated showers in the afternoon.
.TONIGHT...East winds 15 knots. Wind waves 4 feet. Isolated
showers.
.WEDNESDAY...East winds 10 knots. Wind waves 4 feet. Northwest
swell 3 feet in the afternoon. Isolated showers.
.WEDNESDAY NIGHT...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 to 7 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.

$$

PHZ118-210745-
Maui County Leeward Waters-
926 AM HST Tue Apr 20 2021

.REST OF TODAY...East winds 10 knots backing west in the
afternoon. Wind waves 3 feet. North swell 3 feet. Isolated
showers in the afternoon.
.TONIGHT...North winds 10 knots veering southeast after midnight.
Wind waves 3 feet. Isolated showers through the night.
.WEDNESDAY...Northeast winds 10 knots in the morning becoming
variable less than 10 knots. Wind waves 3 feet in the morning
then 2 feet or less. Isolated showers.
.WEDNESDAY NIGHT...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...Northeast winds 15 knots. Wind waves 5 to 6 feet. North
swell 3 feet. Isolated showers.
.SATURDAY...Northeast winds 15 knots. Wind waves 5 feet. North
swell 3 feet. Isolated showers.

$$

PHZ119-210745-
Maalaea Bay-
926 AM HST Tue Apr 20 2021

.REST OF TODAY...West winds 10 knots. Wind waves 2 feet or less.
Isolated showers in the afternoon.
.TONIGHT...Winds variable less than 10 knots. Wind waves 2 feet
or less. Isolated showers in the evening.
.WEDNESDAY...Winds variable less than 10 knots. Wind waves 2 feet
or less.
.WEDNESDAY NIGHT...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...Northeast winds 10 knots. Wind waves 2 feet or
less.
.FRIDAY...Northeast winds 10 knots. Wind waves 3 feet.
.SATURDAY...Northeast winds 10 knots. Wind waves 3 feet.

$$

PHZ120-210745-
Pailolo Channel-
926 AM HST Tue Apr 20 2021

.REST OF TODAY...East winds 10 knots. Wind waves 4 feet. North
swell 3 feet. Isolated showers in the afternoon.
.TONIGHT...East winds 10 knots. Wind waves 4 feet. Isolated
showers through the night.
.WEDNESDAY...Winds variable less than 10 knots becoming east
10 knots in the afternoon. Wind waves 3 feet. Isolated showers.
.WEDNESDAY NIGHT...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 20 knots. Wind waves 5 feet.
Northwest swell 4 feet. Isolated showers.
.FRIDAY...East winds 20 knots. Wind waves 6 feet. Northwest swell
3 feet. Isolated showers.
.SATURDAY...East winds 20 knots. Wind waves 6 feet. North swell
3 feet. Isolated showers.

$$

PHZ121-210745-
Alenuihaha Channel-
926 AM HST Tue Apr 20 2021

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

$$

PHZ122-210745-
Big Island Windward Waters-
926 AM HST Tue Apr 20 2021

.REST OF TODAY...Southeast winds 20 knots. Wind waves 5 feet.
North swell 3 feet. Isolated showers in the afternoon.
.TONIGHT...East winds 15 knots. Wind waves 5 feet. North swell
3 feet in the evening. Isolated showers.
.WEDNESDAY...East winds 15 knots. Wind waves 4 feet. Isolated
showers.
.WEDNESDAY NIGHT...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 15 knots. Wind waves 5 feet. North swell
3 to 4 feet. Scattered showers.
.SATURDAY...East winds 15 knots. Wind waves 5 feet. North swell
3 feet. Scattered showers.

$$

PHZ123-210745-
Big Island Leeward Waters-
926 AM HST Tue Apr 20 2021

.REST OF TODAY...Winds variable less than 10 knots west of the
Big Island...east 20 knots near South Point. Wind waves 5 feet.
Isolated showers in the afternoon.
.TONIGHT...West of the Big Island, northwest winds 10 knots
backing south after midnight. Near South Point, east winds
15 knots. Wind waves 4 feet. Isolated showers.
.WEDNESDAY...Northwest winds 10 knots west of the Big Island...
east 15 knots near South Point. Wind waves 4 feet. Isolated
showers in the morning.
.WEDNESDAY NIGHT...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 20 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 20 knots near South Point. Wind waves 7 feet.
Northwest swell 3 feet. Isolated showers.
.SATURDAY...Winds variable less than 10 knots west of the Big
Island...east 20 knots near South Point. Wind waves 7 to 8 feet.
Isolated showers.

$$

PHZ124-210745-
Big Island Southeast Waters-
926 AM HST Tue Apr 20 2021

.REST OF TODAY...East winds 15 knots. Wind waves 5 feet. North
swell 3 feet. Isolated showers in the afternoon.
.TONIGHT...East winds 15 knots. Wind waves 4 feet. North swell
3 feet in the evening. Isolated showers.
.WEDNESDAY...East winds 15 knots. Wind waves 4 feet. Isolated
showers.
.WEDNESDAY NIGHT...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 20 knots. Wind waves 6 feet.
Northwest swell 3 feet. Isolated showers.
.FRIDAY...Northeast winds 20 knots. Wind waves 7 feet. Northwest
swell 3 feet. Isolated showers.
.SATURDAY...East winds 20 knots. Wind waves 6 to 7 feet.
Northwest swell 3 feet. Isolated showers.

$$

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



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