Coastal Waters Forecast Issued: 08/13/2026 07:17:00 AM UTC
598
FZHW50 PHFO 122117
CWFHFO
Coastal Waters Forecast
National Weather Service Honolulu HI
1117 AM HST Wed Aug 12 2026
Hawaiian coastal waters within 40 nautical miles including the
Hawaiian Islands Humpback Whale National Marine Sanctuary.
PHZ100-130945-
1117 AM HST Wed Aug 12 2026
.Synopsis for Hawaiian coastal waters...
High pressure to the far northeast will slowly drift into a
position just north of the Hawaiian Islands into the weekend,
producing moderate to locally strong trade winds across the
region. The weather pattern will change significantly this
weekend as early as Friday and will continue to deteriorate over
the weekend. Tropical Storm Conditions will be possible across all
coastal waters this weekend, with the potential for Hurricane
conditions across select waters.
$$
PHZ110-130945-
Kauai Northwest Waters-
1117 AM HST Wed Aug 12 2026
.REST OF TODAY...East winds 15 to 20 knots. Seas to 4 feet. Wave
Detail: East 4 feet at 7 seconds and south southwest 3 feet at
18 seconds.
.TONIGHT...East northeast winds 15 to 20 knots. Seas 4 to 6 feet.
Wave Detail: East 5 feet at 7 seconds and south southwest 3 feet
at 16 seconds. Isolated showers.
.THURSDAY...East northeast winds 15 to 20 knots. Seas 4 to
5 feet. Wave Detail: East 5 feet at 6 seconds and south southwest
3 feet at 15 seconds. Isolated showers.
.THURSDAY NIGHT...East northeast winds to 20 knots. Seas 5 to
7 feet. Wave Detail: East 6 feet at 8 seconds and south southwest
3 feet at 15 seconds. Isolated showers.
.FRIDAY...East northeast winds to 20 knots. Seas 6 to 8 feet.
Wave Detail: East 7 feet at 11 seconds and south southwest 3 feet
at 14 seconds. Isolated showers in the morning.
.FRIDAY NIGHT...East northeast winds to 20 knots. Seas 7 to
10 feet. Wave Detail: East 8 feet at 12 seconds and south
southwest 3 feet at 14 seconds. Scattered showers.
.SATURDAY...Tropical storm conditions possible. Scattered
showers, then heavy showers likely after midnight.
.SUNDAY...Tropical storm conditions possible. Heavy showers
likely through the night, then scattered showers through the day.
$$
PHZ111-130945-
Kauai Windward Waters-
1117 AM HST Wed Aug 12 2026
.REST OF TODAY...East winds to 15 knots. Seas to 4 feet. Wave
Detail: East southeast 4 feet at 7 seconds and south 3 feet at
18 seconds. Isolated showers.
.TONIGHT...East northeast winds to 15 knots. Seas 4 to 6 feet.
Wave Detail: East southeast 5 feet at 7 seconds and south 4 feet
at 16 seconds. Scattered showers.
.THURSDAY...East northeast winds to 15 knots. Seas 4 to 6 feet.
Wave Detail: East 5 feet at 7 seconds and south 4 feet at
15 seconds. Isolated showers.
.THURSDAY NIGHT...East northeast winds 15 to 20 knots. Seas 5 to
7 feet. Wave Detail: East southeast 6 feet at 9 seconds and south
3 feet at 15 seconds. Isolated showers.
.FRIDAY...East northeast winds 15 to 20 knots. Seas 7 to 9 feet.
Wave Detail: East southeast 7 feet at 10 seconds and south 4 feet
at 14 seconds. Isolated showers in the morning.
.FRIDAY NIGHT...East northeast winds 15 to 20 knots. Seas 8 to
10 feet. Wave Detail: East southeast 8 feet at 12 seconds and
south 4 feet at 14 seconds. Scattered showers.
.SATURDAY...Tropical storm conditions possible. Scattered
showers, then heavy showers likely after midnight.
.SUNDAY...Tropical storm conditions possible. Heavy showers
likely through the night, then scattered showers through the day.
$$
PHZ112-130945-
Kauai Leeward Waters-
1117 AM HST Wed Aug 12 2026
.REST OF TODAY...East winds 15 to 20 knots. Seas 4 to 5 feet.
Wave Detail: East southeast 4 feet at 6 seconds and south 4 feet
at 17 seconds. Isolated showers this afternoon.
.TONIGHT...East northeast winds 15 to 20 knots. Seas 4 to 6 feet.
Wave Detail: East 6 feet at 6 seconds and south 4 feet at
16 seconds. Isolated showers in the evening.
.THURSDAY...East northeast winds 15 to 20 knots. Seas 4 to
6 feet. Wave Detail: East 5 feet at 6 seconds and south 4 feet at
15 seconds.
.THURSDAY NIGHT...East northeast winds 15 to 20 knots. Seas 5 to
6 feet. Wave Detail: East 6 feet at 7 seconds and south 4 feet at
15 seconds. Isolated showers after midnight.
.FRIDAY...East northeast winds 15 to 20 knots. Seas 5 to 7 feet.
Wave Detail: East 6 feet at 7 seconds and south 4 feet at
14 seconds.
.FRIDAY NIGHT...East northeast winds 15 to 20 knots. Seas 5 to
7 feet. Wave Detail: East 6 feet at 7 seconds, south 4 feet at
14 seconds and east 3 feet at 11 seconds. Scattered showers after
midnight.
.SATURDAY...Tropical storm conditions possible. Isolated showers
in the morning, then scattered showers through the night. Heavy
showers likely after midnight.
.SUNDAY...Tropical storm conditions possible. Heavy showers
likely through the night, then scattered showers through the day.
$$
PHZ113-130945-
Kauai Channel-
1117 AM HST Wed Aug 12 2026
.REST OF TODAY...East northeast winds 15 to 20 knots. Seas to
4 feet. Wave Detail: East 4 feet at 6 seconds and south 3 feet at
18 seconds.
.TONIGHT...East northeast winds 15 to 20 knots. Seas 5 to 6 feet.
Wave Detail: East northeast 5 feet at 6 seconds and south 4 feet
at 16 seconds. Isolated showers.
.THURSDAY...East northeast winds 15 to 20 knots. Seas 5 to
6 feet. Wave Detail: East northeast 5 feet at 6 seconds and south
4 feet at 15 seconds.
.THURSDAY NIGHT...East northeast winds to 20 knots. Seas 5 to
7 feet. Wave Detail: East northeast 6 feet at 6 seconds and south
3 feet at 15 seconds. Isolated showers after midnight.
.FRIDAY...Northeast winds to 20 knots. Seas 5 to 8 feet. Wave
Detail: East northeast 6 feet at 6 seconds, south 4 feet at
14 seconds and east 3 feet at 10 seconds.
.FRIDAY NIGHT...Northeast winds to 20 knots. Seas 7 to 10 feet.
Wave Detail: East northeast 7 feet at 6 seconds, east 5 feet at
12 seconds and south 4 feet at 14 seconds. Isolated showers in
the evening, then scattered showers after midnight.
.SATURDAY...Tropical storm conditions possible. Scattered
showers, then heavy showers likely after midnight.
.SUNDAY...Tropical storm conditions possible. Heavy showers
likely through the night, then scattered showers through the day.
$$
PHZ114-130945-
Oahu Windward Waters-
1117 AM HST Wed Aug 12 2026
.REST OF TODAY...East northeast winds 15 to 20 knots. Seas to
4 feet. Wave Detail: East 4 feet at 7 seconds and south 3 feet at
18 seconds. Isolated showers this afternoon.
.TONIGHT...East northeast winds 15 to 20 knots. Seas 4 to 5 feet.
Wave Detail: East southeast 5 feet at 6 seconds and south 3 feet
at 16 seconds. Isolated showers.
.THURSDAY...East northeast winds 15 to 20 knots. Seas 4 to
5 feet. Wave Detail: East 5 feet at 6 seconds and south 3 feet at
15 seconds. Isolated showers.
.THURSDAY NIGHT...East northeast winds to 20 knots. Seas 5 to
7 feet. Wave Detail: East southeast 6 feet at 8 seconds and south
3 feet at 15 seconds. Isolated showers after midnight.
.FRIDAY...East northeast winds to 20 knots. Seas 7 to 9 feet.
Wave Detail: East southeast 8 feet at 10 seconds and south 3 feet
at 14 seconds. Isolated showers in the morning.
.FRIDAY NIGHT...East northeast winds to 20 knots. Seas 9 to
10 feet, building to 9 to 12 feet after midnight. Wave Detail:
East 9 feet at 12 seconds. Scattered showers.
.SATURDAY...Tropical storm conditions possible. Scattered showers
through the night, then heavy showers likely through the day.
.SUNDAY...Tropical storm conditions possible. Heavy showers
likely through the night, then scattered showers through the day.
$$
PHZ115-130945-
Oahu Leeward Waters-
1117 AM HST Wed Aug 12 2026
.REST OF TODAY...East northeast winds 15 to 20 knots. Seas 4 to
5 feet. Wave Detail: East 4 feet at 6 seconds and south 4 feet at
17 seconds.
.TONIGHT...East northeast winds 15 to 20 knots. Seas 4 to 6 feet.
Wave Detail: East 5 feet at 6 seconds and south 4 feet at
16 seconds.
.THURSDAY...East northeast winds 15 to 20 knots. Seas 4 to
6 feet. Wave Detail: East northeast 5 feet at 5 seconds and south
4 feet at 15 seconds.
.THURSDAY NIGHT...East northeast winds to 20 knots. Seas 4 to
6 feet. Wave Detail: East 6 feet at 6 seconds and south 4 feet at
15 seconds.
.FRIDAY...Northeast winds 20 to 25 knots. Seas 5 to 7 feet. Wave
Detail: East northeast 6 feet at 6 seconds and south 3 feet at
14 seconds.
.FRIDAY NIGHT...Northeast winds 20 to 25 knots. Seas 5 to 7 feet.
Wave Detail: East 6 feet at 6 seconds and south 4 feet at
14 seconds. Scattered showers after midnight.
.SATURDAY...Tropical storm conditions possible. Isolated showers
in the morning, then scattered showers through the night. Heavy
showers likely after midnight.
.SUNDAY...Tropical storm conditions possible. Heavy showers
likely through the night, then scattered showers through the day.
$$
PHZ116-130945-
Kaiwi Channel-
1117 AM HST Wed Aug 12 2026
.REST OF TODAY...East northeast winds 15 to 20 knots. Seas 4 to
5 feet. Wave Detail: East 4 feet at 5 seconds and south southwest
3 feet at 18 seconds.
.TONIGHT...East northeast winds to 20 knots. Seas 4 to 6 feet.
Wave Detail: East northeast 5 feet at 6 seconds and south
southwest 4 feet at 16 seconds.
.THURSDAY...Northeast winds to 20 knots. Seas 4 to 6 feet. Wave
Detail: East northeast 6 feet at 6 seconds and south southwest
4 feet at 15 seconds. Isolated showers in the morning.
.THURSDAY NIGHT...East northeast winds to 20 knots. Seas 5 to
7 feet. Wave Detail: East 6 feet at 7 seconds and south southwest
3 feet at 15 seconds.
.FRIDAY...East northeast winds 20 to 25 knots. Seas 6 to 9 feet.
Wave Detail: East 8 feet at 8 seconds and south southwest 3 feet
at 14 seconds.
.FRIDAY NIGHT...Northeast winds 20 to 25 knots. Seas 8 to
11 feet. Wave Detail: East northeast 9 feet at 7 seconds, east
7 feet at 12 seconds and south southwest 4 feet at 14 seconds.
Scattered showers.
.SATURDAY...Tropical storm conditions possible. Scattered showers
in the morning, then heavy showers likely.
.SUNDAY...Tropical storm conditions possible. Heavy showers
likely in the morning, then scattered showers.
$$
PHZ117-130945-
Maui County Windward Waters-
1117 AM HST Wed Aug 12 2026
.REST OF TODAY...East northeast winds 15 to 20 knots. Seas 3 to
4 feet. Wave Detail: East southeast 4 feet at 7 seconds.
Scattered showers.
.TONIGHT...East northeast winds 15 to 20 knots. Seas to 4 feet.
Wave Detail: East southeast 4 feet at 6 seconds. Isolated showers
in the evening, then scattered showers after midnight.
.THURSDAY...East northeast winds 15 to 20 knots. Seas 4 to
5 feet. Wave Detail: East southeast 5 feet at 7 seconds.
Scattered showers, mainly in the morning.
.THURSDAY NIGHT...East northeast winds to 20 knots. Seas 4 to
6 feet, building to 6 to 7 feet after midnight. Wave Detail: East
southeast 6 feet at 9 seconds. Isolated showers.
.FRIDAY...East northeast winds to 20 knots. Seas 6 to 7 feet,
building to 7 to 9 feet in the afternoon. Wave Detail: East
southeast 8 feet at 11 seconds. Isolated showers.
.FRIDAY NIGHT...Tropical storm conditions possible. Scattered
heavy showers in the evening, then heavy showers likely after
midnight.
.SATURDAY...Tropical storm conditions possible. Heavy showers.
.SUNDAY...Tropical storm conditions possible. Heavy showers
likely through the night, then scattered showers through the day.
$$
PHZ118-130945-
Maui County Leeward Waters-
1117 AM HST Wed Aug 12 2026
.REST OF TODAY...East northeast winds 15 to 20 knots. Seas 3 to
5 feet. Wave Detail: East 4 feet at 6 seconds and south 4 feet at
17 seconds.
.TONIGHT...East northeast winds 15 to 20 knots. Seas 3 to 5 feet.
Wave Detail: East 4 feet at 5 seconds and south 4 feet at
16 seconds.
.THURSDAY...Northeast winds 15 to 20 knots. Seas 3 to 5 feet.
Wave Detail: East 4 feet at 5 seconds and south 4 feet at
15 seconds.
.THURSDAY NIGHT...Northeast winds 10 to 15 knots. Seas 4 to
6 feet. Wave Detail: East 4 feet at 5 seconds and south 3 feet at
15 seconds.
.FRIDAY...Northeast winds 15 to 20 knots. Seas 5 to 7 feet. Wave
Detail: East 5 feet at 7 seconds and south 4 feet at 14 seconds.
.FRIDAY NIGHT...Northeast winds 15 to 20 knots. Seas 5 to 7 feet.
Wave Detail: East 5 feet at 12 seconds and south 4 feet at
14 seconds. Scattered showers after midnight.
.SATURDAY...Tropical storm conditions possible. Scattered
showers, then heavy showers likely after midnight.
.SUNDAY...Tropical storm conditions possible. Heavy showers
likely in the morning, then scattered showers.
$$
PHZ119-130945-
Maalaea Bay-
1117 AM HST Wed Aug 12 2026
...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY AFTERNOON...
.REST OF TODAY...North northeast winds 20 to 25 knots, easing to
15 knots this afternoon. Seas to 2 feet or less, then to 3 feet
this afternoon. Wave Detail: North northeast 3 feet at 3 seconds
and south southwest 3 feet at 17 seconds.
.TONIGHT...North northeast winds 15 to 20 knots. Seas to 3 feet.
Wave Detail: North northeast 3 feet at 3 seconds and south
southwest 3 feet at 17 seconds.
.THURSDAY...North northeast winds 20 to 25 knots. Seas to 2 feet
or less, then to 3 feet in the afternoon. Wave Detail: North
northeast 3 feet at 3 seconds and south 3 feet at 15 seconds.
.THURSDAY NIGHT...North winds to 25 knots. Seas to 3 feet. Wave
Detail: North northeast 3 feet at 3 seconds and south 3 feet at
15 seconds.
.FRIDAY...North winds to 25 knots. Seas to 3 feet. Wave Detail:
North northeast 3 feet at 4 seconds.
.FRIDAY NIGHT...North northeast winds 20 to 25 knots, becoming
northeast to 15 knots after midnight. Seas to 3 feet. Wave
Detail: North northeast 3 feet at 4 seconds. Isolated showers in
the evening, then scattered showers after midnight.
.SATURDAY...Tropical storm conditions possible. Scattered showers
in the morning, then heavy showers likely.
.SUNDAY...Tropical storm conditions possible. Scattered showers .
$$
PHZ120-130945-
Pailolo Channel-
1117 AM HST Wed Aug 12 2026
...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY AFTERNOON...
.REST OF TODAY...East northeast winds 20 to 25 knots. Seas 3 to
4 feet. Wave Detail: East 4 feet at 4 seconds. Isolated showers
this afternoon.
.TONIGHT...East northeast winds 20 to 25 knots. Seas 3 to 4 feet.
Wave Detail: East 3 feet at 4 seconds. Isolated showers after
midnight.
.THURSDAY...East northeast winds 20 to 25 knots. Seas 3 to
4 feet. Wave Detail: East 4 feet at 4 seconds. Isolated showers
in the morning.
.THURSDAY NIGHT...East northeast winds 20 to 25 knots. Seas 3 to
5 feet. Wave Detail: East 4 feet at 4 seconds. Isolated showers
after midnight.
.FRIDAY...East northeast winds 20 to 25 knots. Seas 5 to 7 feet.
Wave Detail: East 5 feet at 5 seconds. Isolated showers.
.FRIDAY NIGHT...East northeast winds 20 to 25 knots. Seas 5 to
8 feet. Wave Detail: East 5 feet at 7 seconds and east 3 feet at
11 seconds. Scattered showers.
.SATURDAY...Tropical storm conditions possible. Scattered showers
in the morning, then heavy showers likely.
.SUNDAY...Tropical storm conditions possible. Heavy showers
likely in the morning, then scattered showers.
$$
PHZ121-130945-
Alenuihaha Channel-
1117 AM HST Wed Aug 12 2026
...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY AFTERNOON...
.REST OF TODAY...East northeast winds 20 to 25 knots. Gusts up to
35 knots this afternoon. Seas 4 to 6 feet. Wave Detail: East
5 feet at 6 seconds and south southwest 3 feet at 18 seconds.
Scattered showers.
.TONIGHT...East northeast winds 20 to 25 knots. Gusts up to
35 knots in the evening. Seas 4 to 6 feet. Wave Detail: East
5 feet at 6 seconds and south southwest 4 feet at 16 seconds.
Isolated showers.
.THURSDAY...Northeast winds 20 to 25 knots, becoming east
northeast 25 to 30 knots in the afternoon. Seas 5 to 7 feet. Wave
Detail: East 6 feet at 7 seconds and south southwest 4 feet at
15 seconds. Isolated showers in the morning.
.THURSDAY NIGHT...East northeast winds 20 to 25 knots. Gusts up
to 35 knots in the evening. Seas 5 to 7 feet. Wave Detail: East
7 feet at 8 seconds and south southwest 3 feet at 15 seconds.
Isolated showers after midnight.
.FRIDAY...Northeast winds 20 to 25 knots. Gusts up to 35 knots in
the afternoon. Seas 6 to 9 feet. Wave Detail: East 8 feet at
10 seconds and south southwest 4 feet at 14 seconds. Isolated
showers in the morning. Scattered showers in the afternoon.
.FRIDAY NIGHT...Tropical storm conditions possible. Isolated
showers in the evening, then scattered showers after midnight.
.SATURDAY...Tropical storm conditions possible. Scattered showers
in the morning, then heavy showers.
.SUNDAY...Tropical storm conditions possible. Heavy showers
likely in the morning, then scattered showers.
$$
PHZ122-130945-
Big Island Windward Waters-
1117 AM HST Wed Aug 12 2026
.REST OF TODAY...East northeast winds 15 to 20 knots. Seas 3 to
5 feet. Wave Detail: East 4 feet at 8 seconds and south 4 feet at
18 seconds. Isolated showers late this morning, then scattered
showers this afternoon.
.TONIGHT...East northeast winds 15 to 20 knots. Seas 3 to 5 feet.
Wave Detail: East 5 feet at 8 seconds and south 3 feet at
17 seconds. Scattered showers.
.THURSDAY...Northeast winds 15 to 20 knots, rising to 20 to
25 knots in the afternoon. Seas 3 to 5 feet. Wave Detail: East
5 feet at 8 seconds and south 3 feet at 15 seconds. Scattered
showers, mainly in the morning.
.THURSDAY NIGHT...Northeast winds 20 to 25 knots, easing to 15 to
20 knots after midnight. Seas 5 to 7 feet. Wave Detail: East
southeast 6 feet at 10 seconds and south 4 feet at 14 seconds.
Isolated showers in the evening, then scattered showers after
midnight.
.FRIDAY...Northeast winds 15 to 20 knots, rising to 20 to
25 knots in the afternoon. Seas 6 to 8 feet, building to 7 to
10 feet in the afternoon. Wave Detail: East 8 feet at 11 seconds
and south 3 feet at 14 seconds. Scattered showers.
.FRIDAY NIGHT...Tropical storm conditions possible. Heavy
showers.
.SATURDAY...Tropical storm conditions possible. Heavy showers.
.SUNDAY...Southeast winds 25 to 30 knots, becoming east southeast
15 to 20 knots. Seas 6 to 9 feet. Wave Detail: East 6 feet at
6 seconds, east 3 feet at 11 seconds and south 3 feet at
14 seconds. Heavy showers through the night, then scattered
showers through the day.
$$
PHZ123-130945-
Big Island Leeward Waters-
1117 AM HST Wed Aug 12 2026
...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY AFTERNOON...
.REST OF TODAY...Northeast winds 15 to 20 knots. Seas 4 to
6 feet. Wave Detail: East northeast 4 feet at 5 seconds and south
3 feet at 18 seconds. Isolated showers late this morning.
.TONIGHT...East southeast winds 15 to 20 knots, backing to
northeast after midnight. Seas 4 to 6 feet. Wave Detail: East
northeast 4 feet at 5 seconds and south 4 feet at 16 seconds.
Isolated showers after midnight.
.THURSDAY...East northeast winds 15 to 20 knots, becoming east
southeast 20 to 25 knots in the afternoon. Seas 4 to 6 feet. Wave
Detail: Northeast 5 feet at 7 seconds and south 4 feet at
15 seconds.
.THURSDAY NIGHT...East northeast winds 20 to 25 knots, becoming
north northeast 15 to 20 knots after midnight. Seas 5 to 7 feet.
Wave Detail: Northeast 5 feet at 6 seconds and south 3 feet at
15 seconds.
.FRIDAY...North winds 20 to 25 knots. Seas 5 to 7 feet. Wave
Detail: Northeast 6 feet at 6 seconds and south 4 feet at
14 seconds.
.FRIDAY NIGHT...Tropical storm conditions possible. Scattered
showers.
.SATURDAY...Tropical storm conditions possible. Scattered heavy
showers through the night, then heavy showers likely through the
day.
.SUNDAY...Tropical storm conditions possible. Heavy showers
likely in the morning, then scattered showers.
$$
PHZ124-130945-
Big Island Southeast Waters-
1117 AM HST Wed Aug 12 2026
...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY AFTERNOON...
.REST OF TODAY...East northeast winds to 20 knots. Seas 4 to
6 feet. Wave Detail: East 6 feet at 8 seconds and south 3 feet at
18 seconds. Isolated showers.
.TONIGHT...Northeast winds 20 to 25 knots. Seas 5 to 7 feet. Wave
Detail: East 7 feet at 6 seconds and south 3 feet at 17 seconds.
Scattered showers in the evening. Isolated showers after
midnight.
.THURSDAY...Northeast winds 20 to 25 knots. Seas 5 to 7 feet.
Wave Detail: East 7 feet at 6 seconds and south 3 feet at
15 seconds. Isolated showers.
.THURSDAY NIGHT...Northeast winds 20 to 25 knots. Gusts up to
35 knots in the evening. Seas 7 to 9 feet. Wave Detail: East
8 feet at 8 seconds and south 4 feet at 14 seconds. Isolated
showers.
.FRIDAY...North northeast winds 20 to 25 knots. Gusts up to
35 knots in the afternoon. Seas 8 to 11 feet. Wave Detail: East
10 feet at 11 seconds and south 4 feet at 14 seconds. Isolated
showers.
.FRIDAY NIGHT...Tropical storm conditions possible. Heavy showers
likely.
.SATURDAY...Tropical storm conditions possible. Heavy showers.
.SUNDAY...East southeast winds 10 to 15 knots. Seas 5 to 8 feet.
Wave Detail: East 4 feet at 8 seconds and south 3 feet at
14 seconds. Heavy showers through the night, then scattered
showers through the day.
$$
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