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Oahu Surf Observation and Forecast/Coastal Forecast for Hawaiian Waters

179
FZHW50 PHFO 190717
CWFHFO

Coastal Waters Forecast
National Weather Service Honolulu HI
917 PM HST Mon Jan 18 2021

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

PHZ100-192000-
917 PM HST Mon Jan 18 2021

.Synopsis for Hawaiian coastal waters...
A stalled front near east Maui will weaken to a surface trough by
early Tuesday morning, This surface trough will move slowly
westward from Tuesday through Wednesday. Widespread heavy showers
and isolated thunderstorms will accompany this trough as it moves
over the central and western islands. Moderate to locally strong
easterly trade winds will return later this week after the trough
moves west of the state.

$$

PHZ110-192000-
Kauai Northwest Waters-
917 PM HST Mon Jan 18 2021

...GALE WARNING IN EFFECT THROUGH EARLY TUESDAY MORNING...

.REST OF TONIGHT...Northeast winds to 25 knots, gusts to 35
knots. Wind waves 10 feet. Northwest swell 14 feet. Scattered
showers early in the evening, then isolated showers after
midnight.
.TUESDAY...Northeast winds to 25 knots. Wind waves 9 feet.
Northwest swell 11 feet. Scattered showers and slight chance of
thunderstorms.
.TUESDAY NIGHT...Northeast winds to 25 knots. Wind waves 8 feet.
North swell 9 feet. Scattered showers in the evening, then
showers likely after midnight.
.WEDNESDAY...East winds 15 knots. Wind waves 6 feet. North swell
7 feet. Scattered showers.
.WEDNESDAY NIGHT...East winds 20 knots. Wind waves 5 feet. North
swell 6 feet. Scattered showers.
.THURSDAY...East winds 20 knots. Wind waves 5 feet. Northwest
swell 5 feet. Scattered showers.
.THURSDAY NIGHT...East winds 20 knots. Wind waves 5 feet.
Northwest swell 5 feet. Scattered showers.
.FRIDAY...East winds 20 knots. Wind waves 6 to 8 feet. Northwest
swell 8 to 10 feet. Scattered showers.
.SATURDAY...East winds to 25 knots. Wind waves 9 feet. North
swell 6 to 8 feet. Scattered showers.

$$

PHZ111-192000-
Kauai Windward Waters-
917 PM HST Mon Jan 18 2021

...GALE WARNING IN EFFECT THROUGH EARLY TUESDAY MORNING...

.REST OF TONIGHT...Northeast winds to 25 knots, gusts to 35
knots. Wind waves 9 feet. Northwest swell 14 feet. Scattered
showers.
.TUESDAY...Northeast winds to 25 knots. Wind waves 9 feet.
Northwest swell 11 feet. Scattered showers and slight chance of
thunderstorms.
.TUESDAY NIGHT...Northeast winds to 25 knots. Wind waves 8 feet.
North swell 10 feet. Showers likely.
.WEDNESDAY...East winds 15 knots. Wind waves 6 feet. North swell
7 feet. Showers likely in the morning, then scattered showers in
the afternoon.
.WEDNESDAY NIGHT...East winds 15 knots. Wind waves 5 feet. North
swell 6 feet. Scattered showers.
.THURSDAY...East winds 15 knots. Wind waves 5 feet. Northwest
swell 5 feet. Scattered showers.
.THURSDAY NIGHT...East winds 20 knots. Wind waves 6 feet.
Northwest swell 5 feet. Scattered showers.
.FRIDAY...East winds 20 knots. Wind waves 7 to 8 feet. Northwest
swell 7 to 9 feet. Scattered showers.
.SATURDAY...East winds 20 knots. Wind waves 8 to 9 feet. North
swell 5 to 7 feet. Scattered showers.

$$

PHZ112-192000-
Kauai Leeward Waters-
917 PM HST Mon Jan 18 2021

...GALE WARNING IN EFFECT THROUGH EARLY TUESDAY MORNING...

.REST OF TONIGHT...Northeast winds to 25 knots, gusts to 35
knots. Wind waves 12 feet. Northwest swell 14 feet. Isolated
showers.
.TUESDAY...Northeast winds to 25 knots. Wind waves 10 feet.
Northwest swell 11 feet. Slight chance of thunderstorms and
isolated showers.
.TUESDAY NIGHT...Northeast winds to 25 knots. Wind waves 8 feet.
North swell 9 feet. Scattered showers in the evening, then
showers likely after midnight.
.WEDNESDAY...East winds 15 knots. Wind waves 6 feet. North swell
7 feet. Scattered showers.
.WEDNESDAY NIGHT...East winds 20 knots. Wind waves 5 feet. North
swell 6 feet. Scattered showers.
.THURSDAY...East winds 20 knots. Wind waves 5 feet. Northwest
swell 5 feet. Isolated showers.
.THURSDAY NIGHT...East winds 20 knots. Wind waves 4 feet.
Northwest swell 5 feet. Scattered showers.
.FRIDAY...East winds 20 knots. Wind waves 6 to 8 feet. Northwest
swell 8 to 10 feet. Isolated showers.
.SATURDAY...East winds 20 knots. Wind waves 7 to 8 feet. North
swell 6 to 8 feet. Scattered showers.

$$

PHZ113-192000-
Kauai Channel-
917 PM HST Mon Jan 18 2021

...GALE WARNING IN EFFECT THROUGH EARLY TUESDAY MORNING...

.REST OF TONIGHT...Northeast winds to 25 knots, gusts to 35
knots. Wind waves 12 feet. Northwest swell 14 feet. Scattered
showers through the night. Isolated thunderstorms after midnight.
.TUESDAY...Northeast winds to 25 knots. Wind waves 10 feet.
Northwest swell 11 feet. Scattered showers in the morning. Slight
chance of thunderstorms through the day. Showers likely in the
afternoon.
.TUESDAY NIGHT...Northeast winds 20 knots. Wind waves 8 feet.
North swell 9 feet. Showers likely.
.WEDNESDAY...East winds 15 knots. Wind waves 6 feet. North swell
7 feet. Scattered showers.
.WEDNESDAY NIGHT...East winds 20 knots. Wind waves 5 feet. North
swell 6 feet. Scattered showers.
.THURSDAY...East winds 20 knots. Wind waves 5 feet. North swell
5 feet. Isolated showers.
.THURSDAY NIGHT...East winds 20 knots. Wind waves 6 feet. North
swell 5 feet. Scattered showers.
.FRIDAY...East winds 20 knots. Wind waves 7 to 8 feet. Northwest
swell 7 to 9 feet. Scattered showers.
.SATURDAY...East winds 20 knots. Wind waves 8 feet. North swell
5 to 7 feet. Scattered showers.

$$

PHZ114-192000-
Oahu Windward Waters-
917 PM HST Mon Jan 18 2021

...GALE WARNING IN EFFECT THROUGH EARLY TUESDAY MORNING...

.REST OF TONIGHT...Northeast winds to 25 knots, gusts to 35
knots. Wind waves 10 feet. Northwest swell 14 feet. Scattered
heavy showers through the night. Isolated thunderstorms after
midnight.
.TUESDAY...Northeast winds to 25 knots. Wind waves 9 feet.
Northwest swell 12 feet. Frequent heavy showers in the morning.
Slight chance of thunderstorms through the day. Showers likely in
the afternoon.
.TUESDAY NIGHT...East winds 20 knots. Wind waves 8 feet. North
swell 9 feet. Showers likely.
.WEDNESDAY...East winds 20 knots. Wind waves 6 feet. North swell
8 feet. Scattered showers.
.WEDNESDAY NIGHT...East winds 20 knots. Wind waves 5 feet. North
swell 7 feet. Scattered showers.
.THURSDAY...East winds 20 knots. Wind waves 5 feet. Northwest
swell 6 feet. Scattered showers.
.THURSDAY NIGHT...East winds 20 knots. Wind waves 6 feet.
Northwest swell 5 feet. Scattered showers.
.FRIDAY...East winds 20 knots. Wind waves 8 to 9 feet. Northwest
swell 7 to 9 feet. Scattered showers.
.SATURDAY...East winds to 25 knots. Wind waves 9 to 10 feet.
North swell 5 to 7 feet. Scattered showers.

$$

PHZ115-192000-
Oahu Leeward Waters-
917 PM HST Mon Jan 18 2021

...GALE WARNING IN EFFECT THROUGH EARLY TUESDAY MORNING...

.REST OF TONIGHT...Northeast winds to 25 knots, gusts to 35
knots. Wind waves 10 feet. Northwest swell 12 feet. Scattered
heavy showers through the night. Isolated thunderstorms after
midnight.
.TUESDAY...Northeast winds to 25 knots. Wind waves 9 feet.
Northwest swell 10 feet. Showers likely and slight chance of
thunderstorms.
.TUESDAY NIGHT...East winds 15 knots. Wind waves 7 feet.
Northwest swell 8 feet. Scattered showers.
.WEDNESDAY...East winds 15 knots. Wind waves 5 feet. North swell
7 feet. Scattered showers in the morning, then isolated showers
in the afternoon.
.WEDNESDAY NIGHT...East winds 15 knots. Wind waves 4 feet. North
swell 6 feet. Isolated showers.
.THURSDAY...East winds 15 knots. Wind waves 4 feet. Northwest
swell 5 feet. Isolated showers.
.THURSDAY NIGHT...East winds 15 knots. Wind waves 4 feet.
Northwest swell 4 feet. Isolated showers.
.FRIDAY...East winds 20 knots. Wind waves 4 to 6 feet. Northwest
swell 6 to 8 feet. Isolated showers.
.SATURDAY...East winds 15 knots. Wind waves 5 to 6 feet. North
swell 4 to 6 feet. Isolated showers.

$$

PHZ116-192000-
Kaiwi Channel-
917 PM HST Mon Jan 18 2021

...GALE WARNING IN EFFECT THROUGH EARLY TUESDAY MORNING...

.REST OF TONIGHT...Northeast winds to 25 knots, gusts to 35
knots. Wind waves 11 feet. Northwest swell 14 feet. Heavy showers
likely through the night. Isolated thunderstorms after midnight.
.TUESDAY...Northeast winds 20 knots. Wind waves 10 feet.
Northwest swell 13 feet decreasing to 11 feet in the afternoon.
Frequent heavy showers in the morning. Slight chance of
thunderstorms through the day. Showers likely in the afternoon.
.TUESDAY NIGHT...East winds 15 knots. Wind waves 7 feet. North
swell 9 feet. Scattered showers.
.WEDNESDAY...East winds 20 knots. Wind waves 5 feet. North swell
7 feet. Scattered showers in the morning, then isolated showers
in the afternoon.
.WEDNESDAY NIGHT...East winds 20 knots. Wind waves 5 feet. North
swell 6 feet. Isolated showers.
.THURSDAY...East winds 20 knots. Wind waves 5 feet. North swell
6 feet. Isolated showers.
.THURSDAY NIGHT...East winds 20 knots. Wind waves 6 feet. North
swell 5 feet. Scattered showers.
.FRIDAY...East winds 20 knots. Wind waves 8 to 9 feet. Northwest
swell 6 to 8 feet. Isolated showers.
.SATURDAY...East winds 20 knots. Wind waves 9 to 10 feet. North
swell 5 to 7 feet. Isolated showers.

$$

PHZ117-192000-
Maui County Windward Waters-
917 PM HST Mon Jan 18 2021

...GALE WARNING IN EFFECT THROUGH EARLY TUESDAY MORNING...

.REST OF TONIGHT...Northeast winds to 25 knots, gusts to 35
knots. Wind waves 10 feet. Northwest swell 14 feet. Frequent
heavy showers and isolated thunderstorms.
.TUESDAY...East winds to 25 knots easing to 15 knots in the
afternoon. Wind waves 9 feet. Northwest swell 12 feet. Frequent
heavy showers and slight chance of thunderstorms.
.TUESDAY NIGHT...East winds 15 knots. Wind waves 7 feet.
Northwest swell 9 feet. Showers likely in the evening, then
scattered showers after midnight.
.WEDNESDAY...East winds 20 knots. Wind waves 5 feet. North swell
8 feet. Scattered showers.
.WEDNESDAY NIGHT...East winds 20 knots. Wind waves 5 feet. North
swell 7 feet. Scattered showers.
.THURSDAY...East winds 20 knots. Wind waves 5 feet. Northwest
swell 6 feet. Scattered showers.
.THURSDAY NIGHT...East winds 20 knots. Wind waves 6 feet.
Northwest swell 5 feet. Scattered showers.
.FRIDAY...East winds 20 knots. Wind waves 8 to 9 feet. Northwest
swell 6 to 8 feet. Scattered showers.
.SATURDAY...East winds 20 knots. Wind waves 9 to 11 feet. North
swell 5 to 7 feet. Scattered showers.

$$

PHZ118-192000-
Maui County Leeward Waters-
917 PM HST Mon Jan 18 2021

...GALE WARNING IN EFFECT THROUGH EARLY TUESDAY MORNING...

.REST OF TONIGHT...Northeast winds to 25 knots, gusts to 35 knots.
Wind waves 10 feet. Northwest swell 9 feet. Heavy showers likely
early in the evening. Isolated thunderstorms through the night.
Scattered heavy showers after midnight.
.TUESDAY...Northeast winds 20 knots. Wind waves 9 feet. Northwest
swell 8 feet. Scattered showers and slight chance of
thunderstorms.
.TUESDAY NIGHT...East winds 15 knots. Wind waves 7 feet. North
swell 7 feet. Scattered showers.
.WEDNESDAY...East winds 10 knots. Wind waves 4 feet. North swell
6 feet. Scattered showers in the morning, then isolated showers
in the afternoon.
.WEDNESDAY NIGHT...Northeast winds 15 knots. Wind waves 4 feet.
North swell 5 feet. Isolated showers.
.THURSDAY...East winds 10 knots. Wind waves 4 feet. North swell
4 feet. Isolated showers.
.THURSDAY NIGHT...East winds 15 knots. Wind waves 5 feet. North
swell 3 feet. Isolated showers.
.FRIDAY...East winds 15 knots. Wind waves 6 feet. Northwest swell
4 to 6 feet. Isolated showers.
.SATURDAY...East winds 15 knots. Wind waves 6 to 8 feet. North
swell 3 to 5 feet. Isolated showers.

$$

PHZ119-192000-
Maalaea Bay-
917 PM HST Mon Jan 18 2021

...GALE WARNING IN EFFECT THROUGH EARLY TUESDAY MORNING...

.REST OF TONIGHT...North winds to 25 knots, gusts to 35 knots.
Wind waves 4 feet. Frequent heavy showers early in the evening.
Isolated thunderstorms through the night. Heavy showers likely
after midnight.
.TUESDAY...North winds 20 knots. Wind waves 3 feet. Scattered
showers and slight chance of thunderstorms.
.TUESDAY NIGHT...North winds 20 knots. Wind waves 3 feet in the
evening then 2 feet or less. Scattered showers in the evening,
then isolated showers after midnight.
.WEDNESDAY...North winds to 25 knots. Wind waves 2 feet or less.
Isolated showers.
.WEDNESDAY NIGHT...North winds to 25 knots. Wind waves 2 feet or
less. Isolated showers.
.THURSDAY...North winds to 25 knots. Wind waves 2 feet or less.
.THURSDAY NIGHT...North winds to 25 knots. Wind waves 2 feet or
less. Isolated showers.
.FRIDAY...North winds 20 knots. Wind waves 4 to 6 feet. Isolated
showers.
.SATURDAY...North winds to 25 knots. Wind waves 6 to 7 feet.

$$

PHZ120-192000-
Pailolo Channel-
917 PM HST Mon Jan 18 2021

...GALE WARNING IN EFFECT THROUGH EARLY TUESDAY MORNING...

.REST OF TONIGHT...Northeast winds to 25 knots, gusts to 35 knots.
Wind waves 10 feet. Northwest swell 10 feet. Heavy showers likely
and isolated thunderstorms.
.TUESDAY...Northeast winds 20 knots. Wind waves 8 feet. Northwest
swell 9 feet. Showers likely in the morning. Slight chance of
thunderstorms through the day. Scattered showers in the
afternoon.
.TUESDAY NIGHT...East winds 20 knots. Wind waves 5 feet.
Northwest swell 8 feet. Scattered showers.
.WEDNESDAY...East winds to 25 knots. Wind waves 4 feet. Northwest
swell 7 feet. Isolated showers.
.WEDNESDAY NIGHT...East winds to 25 knots. Wind waves 5 feet.
North swell 6 feet. Isolated showers.
.THURSDAY...East winds to 25 knots. Wind waves 5 feet. North
swell 5 feet. Scattered showers.
.THURSDAY NIGHT...East winds 20 knots. Wind waves 5 feet. North
swell 4 feet. Isolated showers.
.FRIDAY...East winds to 25 knots. Wind waves 8 to 10 feet.
Northwest swell 3 to 5 feet. Isolated showers.
.SATURDAY...East winds to 25 knots. Wind waves 12 to 13 feet.
North swell 3 to 4 feet. Isolated showers.

$$

PHZ121-192000-
Alenuihaha Channel-
917 PM HST Mon Jan 18 2021

...GALE WARNING IN EFFECT THROUGH EARLY TUESDAY MORNING...

.REST OF TONIGHT...Northeast winds to 25 knots, gusts to 35 knots.
Wind waves 9 feet. Northwest swell 13 feet. Heavy showers likely
and isolated thunderstorms.
.TUESDAY...East winds 20 knots. Wind waves 8 feet. Northwest
swell 11 feet. Scattered showers and slight chance of
thunderstorms.
.TUESDAY NIGHT...Northeast winds 20 knots. Wind waves 6 feet.
Northwest swell 9 feet. Scattered showers.
.WEDNESDAY...East winds to 25 knots. Wind waves 5 feet. Northwest
swell 8 feet. Scattered showers in the morning, then isolated
showers in the afternoon.
.WEDNESDAY NIGHT...East winds to 25 knots. Wind waves 6 feet.
North swell 7 feet. Isolated showers.
.THURSDAY...East winds 20 knots. Wind waves 5 feet. North swell
6 feet. Scattered showers.
.THURSDAY NIGHT...East winds 20 knots. Wind waves 7 feet.
Northwest swell 5 feet. Isolated showers.
.FRIDAY...East winds to 25 knots. Wind waves 9 to 11 feet.
Northwest swell 5 to 7 feet. Isolated showers.
.SATURDAY...East winds to 25 knots. Wind waves 11 to 12 feet.
North swell 4 to 6 feet. Isolated showers.

$$

PHZ122-192000-
Big Island Windward Waters-
917 PM HST Mon Jan 18 2021

...SMALL CRAFT ADVISORY IN EFFECT THROUGH EARLY TUESDAY MORNING...

.REST OF TONIGHT...East winds 20 knots. Wind waves 9 feet.
Northwest swell 13 feet. Heavy showers likely and isolated
thunderstorms.
.TUESDAY...Southeast winds 20 knots. Wind waves 6 feet. Northwest
swell 12 feet. Showers likely in the morning. Slight chance of
thunderstorms through the day. Scattered showers in the
afternoon.
.TUESDAY NIGHT...East winds 20 knots. Wind waves 4 feet.
Northwest swell 9 feet. Scattered showers.
.WEDNESDAY...East winds 20 knots. Wind waves 4 feet. North swell
8 feet. Scattered showers.
.WEDNESDAY NIGHT...East winds 20 knots. Wind waves 4 feet. North
swell 7 feet. Scattered showers.
.THURSDAY...East winds 20 knots. Wind waves 4 feet. North swell
6 feet. Scattered showers.
.THURSDAY NIGHT...East winds 15 knots. Wind waves 6 feet. North
swell 5 feet. Scattered showers.
.FRIDAY...East winds 20 knots. Wind waves 7 to 9 feet. Northwest
swell 5 to 7 feet. Scattered showers.
.SATURDAY...East winds 20 knots. Wind waves 9 to 10 feet. North
swell 5 to 7 feet. Scattered showers.

$$

PHZ123-192000-
Big Island Leeward Waters-
917 PM HST Mon Jan 18 2021

...GALE WARNING IN EFFECT THROUGH EARLY TUESDAY MORNING...

.REST OF TONIGHT...West of the Big Island, northeast winds to
30 knots with gusts to 35 knots in the Alenuihaha Channel
becoming. Near South Point, east winds 15 knots. Wind waves 9
feet. Northwest swell 9 feet. Heavy showers likely early in the
evening. Isolated thunderstorms through the night. Scattered heavy
showers after midnight.
.TUESDAY...West of the Big Island, winds variable less than
10 knots becoming northwest 10 knots in the afternoon. Near South
Point, east winds 20 knots. Wind waves 8 feet. Northwest swell
9 feet. Scattered showers and slight chance of thunderstorms.
.TUESDAY NIGHT...Northwest winds 10 knots west of the Big
Island...east 20 knots near South Point. Wind waves 5 feet.
Northwest swell 7 feet. Scattered showers.
.WEDNESDAY...Winds variable less than 10 knots west of the Big
Island...east 20 knots near South Point. Wind waves 5 feet.
Northwest swell 5 feet. Scattered showers in the morning, then
isolated showers in the afternoon.
.WEDNESDAY NIGHT...Winds variable less than 10 knots west of the
Big Island...east 20 knots near South Point. Wind waves 5 feet.
Northwest swell 4 feet. Scattered showers.
.THURSDAY...Winds variable less than 10 knots west of the Big
Island...east 20 knots near South Point. Wind waves 5 feet.
Northwest swell 3 feet. Isolated showers.
.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 to 9 feet.
Northwest swell 4 to 6 feet. Isolated showers.
.SATURDAY...West of the Big Island, winds variable less than
10 knots becoming north 10 knots in the afternoon, then becoming
variable less than 10 knots. Near South Point, east winds to
25 knots. Wind waves 10 to 11 feet. North swell 3 to 5 feet.
Isolated showers.

$$

PHZ124-192000-
Big Island Southeast Waters-
917 PM HST Mon Jan 18 2021

...SMALL CRAFT ADVISORY IN EFFECT THROUGH EARLY TUESDAY MORNING...

.REST OF TONIGHT...East winds 15 knots. Wind waves 9 feet.
Northwest swell 9 feet. Scattered heavy showers and isolated
thunderstorms.
.TUESDAY...East winds 15 knots. Wind waves 9 feet. Northwest
swell 9 feet. Scattered showers and slight chance of
thunderstorms.
.TUESDAY NIGHT...East winds 15 knots. Wind waves 6 feet.
Northwest swell 7 feet. Scattered showers.
.WEDNESDAY...East winds 20 knots. Wind waves 5 feet. Northwest
swell 6 feet. Scattered showers.
.WEDNESDAY NIGHT...East winds 20 knots. Wind waves 5 feet.
Northwest swell 6 feet. Scattered showers.
.THURSDAY...East winds 20 knots. Wind waves 5 feet. Northwest
swell 5 feet. Scattered showers.
.THURSDAY NIGHT...East winds 20 knots. Wind waves 5 feet.
Northwest swell 4 feet. Scattered showers.
.FRIDAY...East winds 20 knots. Wind waves 6 to 8 feet. Northwest
swell 4 to 6 feet. Scattered showers.
.SATURDAY...East winds to 25 knots. Wind waves 10 feet. North
swell 3 to 5 feet. Scattered showers.

$$

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



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