307
FZCA52 TJSJ 110818
CWFSJU

Coastal Waters Forecast
National Weather Service San Juan PR
418 AM AST Thu Dec 11 2025

Puerto Rico and the U.S. Virgin Islands Waters

AMZ700-112130-
418 AM AST Thu Dec 11 2025

.SYNOPSIS FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS WATERS...
A surface high pressure will continue to build near the Azores
through the weekend. A weak cold front and another surface high
pressure will move from the western Atlantic into the central
Atlantic during the next few days. This will promote moderate to
locally fresh east to southeast trades across the local waters.
Increasing winds and a long period northerly swell will cause choppy
to rough seas, mostly over the Atlantic offshore waters. Small Craft
Advisory (SCA) conditions are expected across these waters, however,
SCA conditions can spread into portions of the Anegada and Caribbean
waters later this weekend.

$$

AMZ711-112130-
Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N-
418 AM AST Thu Dec 11 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY AFTERNOON...

.TODAY...Southeast winds 15 to 20 knots, diminishing to 10 to
15 knots this afternoon. Seas 5 to 8 feet. Wave Detail: East 5 feet
at 7 seconds and north 4 feet at 13 seconds. Scattered showers early
this morning, then isolated showers late this morning and afternoon.
.TONIGHT...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 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 4 feet
at 13 seconds.
.FRIDAY NIGHT...East winds 15 to 20 knots with gusts up to 25 knots.
Seas 5 to 7 feet. Wave Detail: East 6 feet at 8 seconds and north
3 feet at 13 seconds. Scattered showers.
.SATURDAY...East winds 15 to 20 knots with gusts up to 30 knots.
Seas 6 to 7 feet. Wave Detail: East 6 feet at 9 seconds and north
3 feet at 13 seconds. Numerous showers, mainly in the morning.
.SATURDAY NIGHT...East winds 15 to 20 knots with gusts up to
30 knots. Seas 6 to 7 feet. Wave Detail: East 6 feet at 9 seconds
and northwest 2 feet at 11 seconds. Numerous showers.
.SUNDAY...East winds 15 to 20 knots. Seas 5 to 7 feet. Scattered
showers in the morning.
.SUNDAY NIGHT...East winds 15 to 20 knots, becoming southeast 10 to
15 knots after midnight. Seas 5 to 7 feet. Scattered showers.
.MONDAY...Southeast winds 5 to 10 knots. Seas 5 to 7 feet. Scattered
showers in the morning.
.MONDAY NIGHT...East winds 5 to 10 knots. Seas 4 to 6 feet.

$$

AMZ712-112130-
Coastal Waters of Northern Puerto Rico out 10 NM-
418 AM AST Thu Dec 11 2025

.TODAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas
4 to 5 feet. Wave Detail: East 4 feet at 7 seconds and north 3 feet
at 13 seconds. Scattered showers early this morning. Isolated
showers this afternoon.
.TONIGHT...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 12 seconds.
.FRIDAY...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 11 seconds.
.FRIDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots.
Seas 5 to 6 feet. Wave Detail: East 5 feet at 8 seconds and
northeast 3 feet at 13 seconds. Scattered showers.
.SATURDAY...East winds 10 to 15 knots, increasing to 15 to 20 knots
in the afternoon. Gusts up to 30 knots. Seas 5 to 6 feet. Wave
Detail: East 5 feet at 6 seconds and north 3 feet at 13 seconds.
Scattered showers in the morning.
.SATURDAY NIGHT...East winds 15 to 20 knots with gusts up to
30 knots, diminishing to 10 to 15 knots with gusts up to 20 knots
after midnight. Seas around 5 feet. Wave Detail: East 5 feet at
6 seconds and northeast 3 feet at 13 seconds. Numerous showers.
.SUNDAY...East winds 10 to 15 knots. Seas 4 to 5 feet. Scattered
showers in the afternoon.
.SUNDAY NIGHT...Southeast winds 10 to 15 knots, diminishing to 5 to
10 knots after midnight. Seas 4 to 5 feet. Scattered showers.
.MONDAY...Southeast winds around 5 knots, becoming east in the
afternoon. Seas 4 to 5 feet. Scattered showers in the morning.
.MONDAY NIGHT...East winds 5 to 10 knots. Seas around 4 feet.

$$

AMZ716-112130-
Coastal Waters from Cabo San Juan to the waters between Anegada
Island and Virgin Gorda and North 10 NM-
418 AM AST Thu Dec 11 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.TODAY...Southeast winds 15 to 20 knots with gusts up to 25 knots.
Seas 4 to 6 feet. Wave Detail: Southeast 5 feet at 6 seconds and
north 2 feet at 13 seconds. Scattered showers early this morning,
then isolated showers late this morning and afternoon.
.TONIGHT...East winds around 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. Scattered showers in the evening.
.FRIDAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas
4 to 6 feet. Wave Detail: East 4 feet at 5 seconds and north 4 feet
at 11 seconds.
.FRIDAY NIGHT...East winds 15 to 20 knots with gusts up to 25 knots.
Seas 5 to 7 feet. Wave Detail: East 5 feet at 6 seconds and north
3 feet at 13 seconds. Numerous showers.
.SATURDAY...East winds 15 to 20 knots with gusts up to 25 knots.
Seas 4 to 6 feet. Wave Detail: East 5 feet at 6 seconds and north
3 feet at 12 seconds. Numerous showers, mainly in the morning.
.SATURDAY 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
and north 3 feet at 13 seconds. Numerous showers.
.SUNDAY...East winds 15 to 20 knots. Seas 4 to 5 feet. Scattered
showers in the morning.
.SUNDAY NIGHT...East winds 10 to 15 knots. Seas 4 to 5 feet.
Scattered showers.
.MONDAY...Southeast winds 5 to 10 knots. Seas 3 to 4 feet. Scattered
showers in the morning.
.MONDAY NIGHT...East winds 5 to 10 knots. Seas 3 to 4 feet.
Scattered showers.

$$

AMZ723-112130-
Anegada Passage east of Virgin Gorda and Saint Croix south to 17N-
418 AM AST Thu Dec 11 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.TODAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas
around 6 feet. Wave Detail: East 6 feet at 7 seconds and north
2 feet at 13 seconds. Scattered showers late this morning. Isolated
showers early this 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 6 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 25 knots.
Seas around 6 feet. Wave Detail: East 6 feet at 6 seconds and north
3 feet at 13 seconds. Scattered showers.
.SATURDAY...East winds 15 to 20 knots with gusts up to 25 knots.
Seas around 6 feet. Wave Detail: East 6 feet at 7 seconds and north
3 feet at 13 seconds. Scattered showers in the afternoon.
.SATURDAY NIGHT...East winds 15 to 20 knots with gusts up to
25 knots. Seas around 6 feet. Wave Detail: East 6 feet at 7 seconds
and north 2 feet at 13 seconds.
.SUNDAY...East winds 15 to 20 knots. Seas 5 to 6 feet.
.SUNDAY NIGHT...East winds 10 to 15 knots. Seas 5 to 6 feet.
.MONDAY...East winds 10 to 15 knots, diminishing to 5 to 10 knots in
the afternoon. Seas 4 to 5 feet.
.MONDAY NIGHT...East winds 5 to 10 knots. Seas 4 to 5 feet.
Scattered showers.

$$

AMZ726-112130-
Coastal waters east of Puerto Rico, around Vieques, and around and
just north of Culebra and Saint John-
418 AM AST Thu Dec 11 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION...

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

$$

AMZ733-112130-
Caribbean waters of Puerto Rico from 10 NM to 17N, including the
coastal waters of Saint Croix-
418 AM AST Thu Dec 11 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.TODAY...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. Scattered
showers this morning, then numerous showers this afternoon.
.TONIGHT...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. Numerous
showers, mainly in the evening.
.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. Scattered
showers in the morning.
.FRIDAY 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. Scattered
showers.
.SATURDAY...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. Scattered
showers in the morning.
.SATURDAY NIGHT...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.
.SUNDAY...East winds 15 to 20 knots. Seas 5 to 6 feet.
.SUNDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to
15 knots after midnight. Seas around 5 feet.
.MONDAY...East winds 5 to 10 knots. Seas 4 to 5 feet.
.MONDAY NIGHT...East winds 5 to 10 knots. Seas around 4 feet.
Scattered showers.

$$

AMZ735-112130-
Coastal Waters of Southern Puerto Rico out 10 NM-
418 AM AST Thu Dec 11 2025

.TODAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas
3 to 5 feet. Wave Detail: Southeast 4 feet at 6 seconds. Isolated
showers until late afternoon, then numerous showers late.
.TONIGHT...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. Scattered
showers.
.FRIDAY...East winds 15 to 20 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 25 knots.
Seas 4 to 5 feet. Wave Detail: East 4 feet at 7 seconds.
.SATURDAY...East winds 15 to 20 knots with gusts up to 30 knots.
Seas 4 to 5 feet. Wave Detail: East 5 feet at 7 seconds.
.SATURDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to
15 knots after midnight. Gusts up to 30 knots. Seas 3 to 5 feet.
Wave Detail: East 5 feet at 7 seconds. Numerous showers.
.SUNDAY...East winds 10 to 15 knots. Seas 3 to 5 feet.
.SUNDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 5 feet.
.MONDAY...East winds 5 to 10 knots. Seas 3 to 4 feet.
.MONDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 4 feet.

$$

AMZ741-112130-
Mona Passage Southward to 17N-
418 AM AST Thu Dec 11 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.TODAY...East winds 15 to 20 knots, diminishing to 10 to 15 knots
late. Seas 4 to 5 feet. Wave Detail: Southeast 5 feet at 6 seconds
and north 2 feet at 13 seconds. Isolated showers.
.TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas
5 to 6 feet. Wave Detail: East 5 feet at 7 seconds and north 4 feet
at 12 seconds. Scattered showers in the evening, then numerous
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 and north 4 feet
at 11 seconds. Scattered showers in the morning.
.FRIDAY 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
3 feet at 11 seconds.
.SATURDAY...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
3 feet at 12 seconds.
.SATURDAY NIGHT...East winds 15 to 20 knots with gusts up to
30 knots. Seas 5 to 7 feet. Wave Detail: East 6 feet at 7 seconds
and northeast 3 feet at 13 seconds.
.SUNDAY...East winds 15 to 20 knots. Seas 4 to 6 feet. Scattered
showers in the afternoon.
.SUNDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to
15 knots after midnight. Seas 4 to 6 feet. Scattered showers.
.MONDAY...East winds 5 to 10 knots. Seas 4 to 5 feet.
.MONDAY NIGHT...East winds 5 to 10 knots. Seas 4 to 5 feet.
Scattered showers.

$$

AMZ742-112130-
Coastal Waters of Northwestern Puerto Rico out 10 NM-
418 AM AST Thu Dec 11 2025

.TODAY...East winds 5 to 10 knots, becoming southeast late this
morning and early afternoon, then becoming east late. Seas 2 to
4 feet. Wave Detail: East 2 feet at 6 seconds and north 2 feet at
13 seconds. Scattered showers late.
.TONIGHT...East winds 5 to 10 knots. Seas 3 to 5 feet. Wave Detail:
North 3 feet at 12 seconds and southeast 2 feet at 6 seconds.
.FRIDAY...East winds 5 to 10 knots. Seas 3 to 5 feet. Wave Detail:
Southeast 2 feet at 7 seconds. Scattered showers in the afternoon.
.FRIDAY NIGHT...East winds 5 to 10 knots with gusts up to 20 knots.
Seas 2 to 4 feet. Wave Detail: East 4 feet at 7 seconds and north
4 feet at 10 seconds.
.SATURDAY...East winds 10 to 15 knots, increasing to 15 to 20 knots
in the afternoon. Gusts up to 30 knots. Seas 2 to 4 feet. Wave
Detail: North 3 feet at 7 seconds and north 3 feet at 12 seconds.
Scattered showers in the afternoon.
.SATURDAY NIGHT...East winds 15 to 20 knots with gusts up to
30 knots, diminishing to 10 to 15 knots with gusts up to 20 knots
after midnight. Seas 2 to 4 feet. Wave Detail: Northeast 4 feet at
5 seconds and north 3 feet at 13 seconds.
.SUNDAY...East winds 5 to 10 knots, diminishing to around 5 knots in
the afternoon. Seas 2 to 4 feet. Scattered showers in the afternoon.
.SUNDAY NIGHT...Southeast winds 5 to 10 knots. Seas 2 to 4 feet.
.MONDAY...East winds around 5 knots, becoming northeast in the
afternoon. Seas 2 to 3 feet. Scattered showers in the afternoon.
.MONDAY NIGHT...East winds around 5 knots. Seas 2 to 3 feet.
Scattered showers.

$$

AMZ745-112130-
Coastal Waters of Southwestern Puerto Rico out 10 NM-
418 AM AST Thu Dec 11 2025

.TODAY...East winds 5 to 10 knots, becoming southeast 10 to 15 knots
late this morning and afternoon. Gusts up to 25 knots. Seas 2 to
3 feet. Wave Detail: Southeast 3 feet at 6 seconds and northwest
1 foot at 10 seconds. Isolated showers late.
.TONIGHT...East winds 5 to 10 knots. Seas 2 to 4 feet. Wave Detail:
Southeast 3 feet at 6 seconds and northwest 3 feet at 12 seconds.
Scattered showers in the evening.
.FRIDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas
2 to 4 feet. Wave Detail: Southeast 3 feet at 6 seconds and
northwest 3 feet at 11 seconds.
.FRIDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots,
diminishing to 5 to 10 knots after midnight. Seas 2 to 4 feet. Wave
Detail: Southeast 3 feet at 6 seconds and northwest 2 feet at
10 seconds.
.SATURDAY...East winds 10 to 15 knots with gusts up to 20 knots,
increasing to 15 to 20 knots with gusts up to 30 knots in the
afternoon. Seas 2 to 4 feet. Wave Detail: Southeast 3 feet at
6 seconds and northwest 2 feet at 10 seconds. Scattered showers in
the afternoon.
.SATURDAY NIGHT...East winds 15 to 20 knots with gusts up to
30 knots, diminishing to 5 to 10 knots after midnight. Seas 2 to
4 feet. Wave Detail: East 3 feet at 5 seconds and northwest 2 feet
at 10 seconds.
.SUNDAY...East winds 5 to 10 knots, becoming southeast 15 to
20 knots in the afternoon. Seas 2 to 4 feet.
.SUNDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 4 feet.
.MONDAY...East winds 5 to 10 knots. Seas 2 to 3 feet.
.MONDAY NIGHT...East winds around 5 knots. Seas 2 to 3 feet.

$$