165
FZCA52 TJSJ 100748
CWFSJU

Coastal Waters Forecast
National Weather Service San Juan PR
348 AM AST Wed Dec 10 2025

Puerto Rico and the U.S. Virgin Islands Waters

AMZ700-102030-
348 AM AST Wed Dec 10 2025

.SYNOPSIS FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS WATERS...
A building surface high pressure over the Central Atlantic will
continue to promote easterly gentle to moderate winds today,
becoming moderate to locally fresh tonight. Increasing winds
combined with a long- period northerly swell arriving early Thursday
will lead to choppy to rough seas mainly over the Atlantic offshore
waters. A Small Craft Advisory in effect from Thursday morning
through late Thursday night. Although conditions will slightly
improve by Friday, hazardous conditions for small craft may return
by the weekend.

$$

AMZ711-102030-
Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N-
348 AM AST Wed Dec 10 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM THURSDAY MORNING THROUGH LATE
THURSDAY NIGHT...
...SMALL CRAFT SHOULD EXERCISE CAUTION...

.TODAY...East winds 10 to 15 knots, increasing to 15 to 20 knots
late this morning and afternoon. Seas 4 to 6 feet. Wave Detail: East
5 feet at 8 seconds and north 2 feet at 14 seconds. Isolated showers
until late afternoon, then scattered showers late.
.TONIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas
5 to 6 feet. Wave Detail: East 5 feet at 8 seconds and north 2 feet
at 13 seconds. Scattered showers.
.THURSDAY...East winds 15 to 20 knots, diminishing to 10 to 15 knots
in the afternoon. Seas 5 to 7 feet. Wave Detail: East 5 feet at
7 seconds and north 4 feet at 13 seconds.
.THURSDAY NIGHT...East winds 10 to 15 knots with gusts up to
25 knots. Seas 6 to 7 feet. Wave Detail: East 5 feet at 8 seconds
and north 4 feet at 11 seconds.
.FRIDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas
6 to 7 feet. Wave Detail: East 5 feet at 8 seconds and north 4 feet
at 11 seconds.
.FRIDAY NIGHT...East winds 15 to 20 knots with gusts up to 25 knots.
Seas 6 to 7 feet. Wave Detail: East 6 feet at 9 seconds and north
3 feet at 13 seconds. Scattered showers.
.SATURDAY...East winds 15 to 20 knots. Seas 6 to 7 feet. Scattered
showers in the morning.
.SATURDAY NIGHT...East winds 15 to 20 knots. Seas 6 to 7 feet.
Scattered showers.
.SUNDAY...East winds 15 to 20 knots. Seas 5 to 7 feet. Scattered
showers.
.SUNDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to
15 knots after midnight. Seas 5 to 7 feet. Scattered showers.

$$

AMZ712-102030-
Coastal Waters of Northern Puerto Rico out 10 NM-
348 AM AST Wed Dec 10 2025

.TODAY...Southeast winds 5 to 10 knots, becoming east 10 to 15 knots
with gusts up to 25 knots late this morning and afternoon. Seas 3 to
4 feet. Wave Detail: East 4 feet at 8 seconds and north 2 feet at
15 seconds. Isolated showers until late afternoon, then scattered
showers late.
.TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas
4 to 5 feet. Wave Detail: East 4 feet at 6 seconds and north 2 feet
at 13 seconds. Scattered showers in the evening.
.THURSDAY...East winds 10 to 15 knots with gusts up to 25 knots.
Seas 4 to 5 feet. Wave Detail: East 4 feet at 6 seconds and north
4 feet at 13 seconds.
.THURSDAY NIGHT...East winds 10 to 15 knots with gusts up to
20 knots. Seas 5 to 6 feet. Wave Detail: East 4 feet at 7 seconds
and north 4 feet at 11 seconds. Scattered showers in the evening.
.FRIDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas
5 to 6 feet. Wave Detail: East 4 feet at 8 seconds and north 4 feet
at 11 seconds.
.FRIDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots.
Seas 5 to 6 feet. Wave Detail: East 4 feet at 8 seconds and north
3 feet at 12 seconds. Scattered showers.
.SATURDAY...East winds 15 to 20 knots. Seas 5 to 6 feet.
.SATURDAY NIGHT...East winds 10 to 15 knots. Seas 5 to 6 feet.
Scattered showers.
.SUNDAY...East winds 10 to 15 knots. Seas around 5 feet. Scattered
showers.
.SUNDAY NIGHT...East winds 10 to 15 knots, diminishing to 5 to
10 knots after midnight. Seas 4 to 5 feet.

$$

AMZ716-102030-
Coastal Waters from Cabo San Juan to the waters between Anegada
Island and Virgin Gorda and North 10 NM-
348 AM AST Wed Dec 10 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.TODAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas
3 to 5 feet. Wave Detail: East 4 feet at 5 seconds and northeast
2 feet at 14 seconds. Scattered showers until late afternoon, then
numerous showers late.
.TONIGHT...East winds 15 to 20 knots with gusts up to 30 knots. Seas
4 to 5 feet. Wave Detail: East 4 feet at 5 seconds and northeast
2 feet at 13 seconds. Scattered showers.
.THURSDAY...East winds 15 to 20 knots. Gusts up to 30 knots in the
morning. Seas 4 to 5 feet. Wave Detail: East 5 feet at 6 seconds and
north 2 feet at 13 seconds. Scattered showers in the morning.
.THURSDAY NIGHT...East winds 10 to 15 knots with gusts up to
25 knots. Seas 4 to 6 feet. Wave Detail: East 4 feet at 6 seconds
and north 4 feet at 12 seconds.
.FRIDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas
4 to 6 feet. Wave Detail: East 4 feet at 6 seconds and north 4 feet
at 11 seconds.
.FRIDAY NIGHT...East winds 15 to 20 knots with gusts up to 25 knots.
Seas 4 to 6 feet. Wave Detail: East 5 feet at 5 seconds and north
3 feet at 11 seconds. Scattered showers.
.SATURDAY...East winds 15 to 20 knots. Seas 4 to 6 feet. Scattered
showers.
.SATURDAY NIGHT...East winds around 15 knots. Seas 4 to 6 feet.
Scattered showers.
.SUNDAY...East winds 15 to 20 knots. Seas 4 to 6 feet. Scattered
showers in the morning.
.SUNDAY NIGHT...East winds 10 to 15 knots. Seas 4 to 5 feet.
Scattered showers.

$$

AMZ723-102030-
Anegada Passage east of Virgin Gorda and Saint Croix south to 17N-
348 AM AST Wed Dec 10 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.TODAY...East winds 15 to 20 knots with gusts up to 30 knots. Seas
4 to 6 feet. Wave Detail: East 6 feet at 7 seconds and north 2 feet
at 14 seconds. Scattered showers early this morning, then numerous
showers late this morning. Scattered showers this afternoon.
.TONIGHT...East winds 15 to 20 knots with gusts up to 30 knots. Seas
5 to 6 feet. Wave Detail: East 6 feet at 7 seconds and north 2 feet
at 13 seconds. Scattered showers.
.THURSDAY...East winds 15 to 20 knots with gusts up to 25 knots.
Seas 5 to 6 feet. Wave Detail: East 6 feet at 7 seconds and north
2 feet at 13 seconds.
.THURSDAY NIGHT...East winds 15 to 20 knots with gusts up to
25 knots. Seas 5 to 6 feet. Wave Detail: East 5 feet at 7 seconds
and north 2 feet at 14 seconds.
.FRIDAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas
around 6 feet. Wave Detail: East 5 feet at 6 seconds and north
3 feet at 13 seconds.
.FRIDAY NIGHT...East winds 15 to 20 knots with gusts up to 30 knots.
Seas 6 to 7 feet. Wave Detail: East 6 feet at 6 seconds and north
3 feet at 13 seconds.
.SATURDAY...East winds 15 to 20 knots. Seas 6 to 7 feet. Scattered
showers in the afternoon.
.SATURDAY NIGHT...East winds 15 to 20 knots. Seas 6 to 7 feet.
.SUNDAY...East winds 15 to 20 knots. Seas around 6 feet.
.SUNDAY NIGHT...East winds 15 to 20 knots. Seas 5 to 6 feet.

$$

AMZ726-102030-
Coastal waters east of Puerto Rico, around Vieques, and around and
just north of Culebra and Saint John-
348 AM AST Wed Dec 10 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.TODAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas
3 to 5 feet. Wave Detail: East 5 feet at 6 seconds. Scattered
showers early this morning, then numerous showers late this morning
and afternoon.
.TONIGHT...East winds 15 to 20 knots with gusts up to 30 knots. Seas
4 to 5 feet. Wave Detail: East 5 feet at 6 seconds. Scattered
showers.
.THURSDAY...East winds 15 to 20 knots with gusts up to 30 knots,
diminishing to 10 to 15 knots with gusts up to 20 knots in the
afternoon. Seas 4 to 5 feet. Wave Detail: East 5 feet at 6 seconds.
Scattered showers in the morning.
.THURSDAY NIGHT...East winds 10 to 15 knots with gusts up to
25 knots. Seas 4 to 5 feet. Wave Detail: East 4 feet at 7 seconds.
.FRIDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas
4 to 5 feet. Wave Detail: East 4 feet at 7 seconds.
.FRIDAY NIGHT...East winds 15 to 20 knots with gusts up to 25 knots.
Seas 4 to 5 feet. Wave Detail: East 5 feet at 6 seconds. Scattered
showers.
.SATURDAY...East winds 15 to 20 knots. Seas 4 to 6 feet. Scattered
showers.
.SATURDAY NIGHT...East winds around 15 knots. Seas 4 to 6 feet.
Scattered showers.
.SUNDAY...East winds 15 to 20 knots. Seas 4 to 6 feet. Scattered
showers in the morning.
.SUNDAY NIGHT...East winds 10 to 15 knots. Seas 4 to 5 feet.
Scattered showers.

$$

AMZ733-102030-
Caribbean waters of Puerto Rico from 10 NM to 17N, including the
coastal waters of Saint Croix-
348 AM AST Wed Dec 10 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.TODAY...East winds 10 to 15 knots, increasing to 15 to 20 knots
this afternoon. Seas 4 to 5 feet. Wave Detail: East 4 feet at
7 seconds. Scattered showers this morning. Numerous showers early
this afternoon. Scattered showers late.
.TONIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas
4 to 5 feet. Wave Detail: East 5 feet at 7 seconds. Scattered
showers.
.THURSDAY...East winds 15 to 20 knots, diminishing to 10 to 15 knots
in the afternoon. Seas 5 to 6 feet. Wave Detail: East 5 feet at
7 seconds. Scattered showers in the morning.
.THURSDAY NIGHT...East winds 15 to 20 knots with gusts up to
25 knots. Seas 4 to 5 feet. Wave Detail: East 5 feet at 7 seconds.
Scattered showers after midnight.
.FRIDAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas
5 to 6 feet. Wave Detail: East 5 feet at 7 seconds.
.FRIDAY NIGHT...East winds 15 to 20 knots with gusts up to 25 knots.
Seas around 5 feet. Wave Detail: East 5 feet at 7 seconds. Scattered
showers.
.SATURDAY...East winds 15 to 20 knots. Seas 5 to 6 feet.
.SATURDAY NIGHT...East winds 15 to 20 knots. Seas around 6 feet.
.SUNDAY...East winds 15 to 20 knots. Seas 5 to 6 feet.
.SUNDAY NIGHT...East winds around 15 knots. Seas 5 to 6 feet.

$$

AMZ735-102030-
Coastal Waters of Southern Puerto Rico out 10 NM-
348 AM AST Wed Dec 10 2025

.TODAY...East winds 5 to 10 knots, increasing to 10 to 15 knots with
gusts up to 20 knots late this morning and afternoon. Seas 3 to
4 feet. Wave Detail: East 4 feet at 7 seconds. Isolated showers
until late afternoon, then scattered showers late.
.TONIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas
3 to 4 feet. Wave Detail: East 4 feet at 7 seconds. Scattered
showers in the evening.
.THURSDAY...East winds 10 to 15 knots with gusts up to 25 knots.
Seas 3 to 5 feet. Wave Detail: East 4 feet at 6 seconds.
.THURSDAY NIGHT...East winds 10 to 15 knots with gusts up to
20 knots. Seas 3 to 4 feet. Wave Detail: East 4 feet at 7 seconds.
.FRIDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas
3 to 5 feet. Wave Detail: East 4 feet at 7 seconds.
.FRIDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots.
Seas 3 to 5 feet. Wave Detail: East 4 feet at 7 seconds.
.SATURDAY...East winds 10 to 15 knots, increasing to 15 to 20 knots
in the afternoon. Seas 3 to 5 feet.
.SATURDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to
15 knots after midnight. Seas 4 to 5 feet.
.SUNDAY...East winds 10 to 15 knots. Seas 4 to 5 feet.
.SUNDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 5 feet.

$$

AMZ741-102030-
Mona Passage Southward to 17N-
348 AM AST Wed Dec 10 2025

.TODAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas
3 to 4 feet. Wave Detail: East 4 feet at 7 seconds and north 1 foot
at 8 seconds. Isolated showers early this morning. Isolated showers
late.
.TONIGHT...East winds 10 to 15 knots, increasing to 15 to 20 knots
after midnight. Seas 3 to 5 feet. Wave Detail: East 5 feet at
7 seconds and north 2 feet at 13 seconds. Scattered showers.
.THURSDAY...East winds 15 to 20 knots, diminishing to 10 to 15 knots
in the afternoon. Seas 4 to 5 feet. Wave Detail: East 4 feet at
6 seconds and north 2 feet at 13 seconds.
.THURSDAY NIGHT...East winds 10 to 15 knots with gusts up to
25 knots. Seas 5 to 6 feet. Wave Detail: East 5 feet at 7 seconds
and north 4 feet at 12 seconds. Scattered showers after midnight.
.FRIDAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas
5 to 7 feet. Wave Detail: East 5 feet at 7 seconds and north 4 feet
at 11 seconds.
.FRIDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to
15 knots after midnight. Seas 5 to 6 feet. Wave Detail: East 5 feet
at 7 seconds and north 3 feet at 11 seconds. Scattered showers.
.SATURDAY...East winds 15 to 20 knots, increasing to 20 to 25 knots
in the afternoon. Seas 5 to 6 feet.
.SATURDAY NIGHT...East winds 20 to 25 knots, diminishing to 15 to
20 knots after midnight. Seas 5 to 7 feet.
.SUNDAY...East winds 15 to 20 knots. Seas 5 to 7 feet. Scattered
showers in the afternoon.
.SUNDAY NIGHT...East winds 10 to 15 knots. Seas 5 to 6 feet.

$$

AMZ742-102030-
Coastal Waters of Northwestern Puerto Rico out 10 NM-
348 AM AST Wed Dec 10 2025

.TODAY...East winds around 5 knots. Seas 2 to 3 feet. Wave Detail:
Southeast 2 feet at 5 seconds and north 1 foot at 8 seconds.
Isolated showers until late afternoon, then scattered showers late.
.TONIGHT...East winds around 5 knots, increasing to 5 to 10 knots
after midnight. Seas 2 to 3 feet. Wave Detail: East 2 feet at
7 seconds and north 2 feet at 13 seconds.
.THURSDAY...East winds 5 to 10 knots. Seas 2 to 4 feet. Wave Detail:
East 2 feet at 6 seconds and north 2 feet at 13 seconds. Scattered
showers in the afternoon.
.THURSDAY NIGHT...East winds 5 to 10 knots. Seas 3 to 5 feet. Wave
Detail: North 3 feet at 12 seconds and southeast 2 feet at
5 seconds.
.FRIDAY...East winds 5 to 10 knots. Seas 3 to 5 feet. Wave Detail:
North 4 feet at 11 seconds and east 2 feet at 6 seconds.
.FRIDAY NIGHT...East winds 5 to 10 knots. Seas 3 to 5 feet. Wave
Detail: North 3 feet at 10 seconds and southeast 2 feet at
6 seconds.
.SATURDAY...East winds 10 to 15 knots. Seas 3 to 5 feet. Scattered
showers in the afternoon.
.SATURDAY NIGHT...East winds 10 to 15 knots, diminishing to 5 to
10 knots after midnight. Seas 3 to 5 feet.
.SUNDAY...East winds 5 to 10 knots. Seas 2 to 4 feet. Scattered
showers in the afternoon.
.SUNDAY NIGHT...East winds around 5 knots. Seas 2 to 4 feet.

$$

AMZ745-102030-
Coastal Waters of Southwestern Puerto Rico out 10 NM-
348 AM AST Wed Dec 10 2025

.TODAY...East winds 5 to 10 knots with gusts up to 20 knots,
becoming southeast 10 to 15 knots with gusts up to 20 knots late.
Seas 2 to 3 feet. Wave Detail: East 2 feet at 6 seconds and
northwest 1 foot at 10 seconds.
.TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas
2 to 3 feet. Wave Detail: Southeast 2 feet at 5 seconds and
northwest 1 foot at 9 seconds.
.THURSDAY...East winds 10 to 15 knots with gusts up to 25 knots.
Seas 2 to 4 feet. Wave Detail: Southeast 3 feet at 5 seconds and
northwest 1 foot at 10 seconds.
.THURSDAY NIGHT...East winds 10 to 15 knots with gusts up to
20 knots, diminishing to 5 to 10 knots after midnight. Seas 2 to
4 feet. Wave Detail: Southeast 3 feet at 6 seconds and northwest
3 feet at 12 seconds.
.FRIDAY...East winds 5 to 10 knots, increasing to 10 to 15 knots in
the afternoon. Seas 3 to 5 feet. Wave Detail: Southeast 3 feet at
7 seconds and northwest 3 feet at 11 seconds.
.FRIDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots,
diminishing to 5 to 10 knots after midnight. Seas 2 to 4 feet. Wave
Detail: Southeast 3 feet at 7 seconds and northwest 2 feet at
10 seconds.
.SATURDAY...East winds 5 to 10 knots, increasing to 15 to 20 knots
in the afternoon. Seas 2 to 4 feet. Scattered showers in the
afternoon.
.SATURDAY NIGHT...East winds 15 to 20 knots, diminishing to 5 to
10 knots after midnight. Seas 2 to 4 feet.
.SUNDAY...East winds 5 to 10 knots, becoming southeast 10 to
15 knots in the afternoon. Seas 2 to 4 feet. Scattered showers in
the afternoon.
.SUNDAY NIGHT...East winds 10 to 15 knots, diminishing to 5 to
10 knots after midnight. Seas 2 to 4 feet.

$$