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Oahu Surf Observation and Forecast/Coastal Forecast for Hawaiian Waters

310
FZHW50 PHFO 190152
CWFHFO

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

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

PHZ100-191415-
352 PM HST Mon Jan 18 2021

.Synopsis for Hawaiian coastal waters...
Strong to near gale force north and northeast winds are occurring
in the wake of an early day cold frontal passage across the
Hawaiian Islands. Large passing northwest swells will maintain
very rough seas through Wednesday morning. The front has become
stationary near the Big Island and will slowly advance westward
the next few days. As it does, expect a higher potential for
widespread showers, locally heavy, and isolated storms. Moderate
to strong easterly trades east of the trough will return later
this week.

$$

PHZ110-191415-
Kauai Northwest Waters-
352 PM HST Mon Jan 18 2021

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

.TONIGHT...Northeast winds to 25 knots, gusts to 35 knots. Wind
waves 11 feet. Northwest swell 14 feet. Scattered showers 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.

$$

PHZ111-191415-
Kauai Windward Waters-
352 PM HST Mon Jan 18 2021

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

.TONIGHT...Northeast winds to 25 knots, gusts to 35 knots. Wind
waves 10 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.

$$

PHZ112-191415-
Kauai Leeward Waters-
352 PM HST Mon Jan 18 2021

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

.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.

$$

PHZ113-191415-
Kauai Channel-
352 PM HST Mon Jan 18 2021

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

.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.

$$

PHZ114-191415-
Oahu Windward Waters-
352 PM HST Mon Jan 18 2021

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

.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.

$$

PHZ115-191415-
Oahu Leeward Waters-
352 PM HST Mon Jan 18 2021

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

.TONIGHT...Northeast winds to 25 knots, gusts to 35 knots. Wind
waves 11 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.

$$

PHZ116-191415-
Kaiwi Channel-
352 PM HST Mon Jan 18 2021

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

.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.

$$

PHZ117-191415-
Maui County Windward Waters-
352 PM HST Mon Jan 18 2021

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

.TONIGHT...Northeast winds to 25 knots, gusts to 35 knots. Wind
waves 11 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.

$$

PHZ118-191415-
Maui County Leeward Waters-
352 PM HST Mon Jan 18 2021

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

.TONIGHT...Northeast winds to 25 knots, gusts to 35 knots. Wind
waves 11 feet. Northwest swell 9 feet. Heavy showers likely 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.

$$

PHZ119-191415-
Maalaea Bay-
352 PM HST Mon Jan 18 2021

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

.TONIGHT...North winds to 25 knots, gusts to 35 knots. Wind waves
4 feet. Frequent heavy showers 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.

$$

PHZ120-191415-
Pailolo Channel-
352 PM HST Mon Jan 18 2021

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

.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.

$$

PHZ121-191415-
Alenuihaha Channel-
352 PM HST Mon Jan 18 2021

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

.TONIGHT...Northeast winds to 25 knots, gusts to 35 knots. Wind
waves 9 feet. Northwest swell 12 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.

$$

PHZ122-191415-
Big Island Windward Waters-
352 PM HST Mon Jan 18 2021

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

.TONIGHT...East winds 10 to 15 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.

$$

PHZ123-191415-
Big Island Leeward Waters-
352 PM HST Mon Jan 18 2021

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

.TONIGHT...North winds to 30 knots with gusts to 35 knots in the
Alenuihaha Channel. Near South Point, east winds 15 knots. Wind
waves 9 feet. Northwest swell 9 feet. Scattered heavy showers.
Isolated thunderstorms through the night.
.TUESDAY...West of the Big Island, winds variable 10 to 15 knots.
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.

$$

PHZ124-191415-
Big Island Southeast Waters-
352 PM HST Mon Jan 18 2021

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

.TONIGHT...East winds 15 knots. Wind waves 8 feet. Northwest
swell 8 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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