536
FZCA52 TJSJ 091901
CWFSJU

Coastal Waters Forecast
National Weather Service San Juan PR
Issued by National Weather Service Melbourne FL
301 PM AST Tue Dec 9 2025

Puerto Rico and the U.S. Virgin Islands Waters

AMZ700-100800-
301 PM AST Tue Dec 9 2025

.SYNOPSIS FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS WATERS...
A broad surface high pressure over the Central Atlantic will promote
east to southeast gentle to moderate winds today through Wednesday.
The high pressure will strengthen and tighten the pressure gradient
and increase winds, allowing seas to build across the Atlantic waters
and exposed passages. Additionally, a long-period northerly swell
arriving early Thursday will further worsen conditions. Choppy to
rough seas are expected, with Small Craft Advisories likely by the
end of the workweek. A gradual improvement remains possible by the
weekend as winds and swell ease.

$$

AMZ711-100800-
Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N-
301 PM AST Tue Dec 9 2025

.TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas
4 to 5 feet. Wave Detail: East 4 feet at 8 seconds and north 2 feet
at 13 seconds. Isolated showers.
.WEDNESDAY...East winds 10 to 15 knots, increasing to 15 to 20 knots
in the afternoon. Seas 4 to 6 feet. Wave Detail: East 5 feet at
8 seconds and north 2 feet at 14 seconds.
.WEDNESDAY NIGHT...East winds 15 to 20 knots with gusts up to
25 knots. Seas 4 to 6 feet. Wave Detail: East 5 feet at 8 seconds
and north 2 feet at 13 seconds.
.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
8 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 12 seconds. Scattered showers.
.FRIDAY...East winds 15 to 20 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.
.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 10 to 15 knots. Seas 6 to 7 feet. Scattered
showers.
.SUNDAY NIGHT...East winds 10 to 15 knots. Seas 5 to 7 feet.
Scattered showers.

$$

AMZ712-100800-
Coastal Waters of Northern Puerto Rico out 10 NM-
301 PM AST Tue Dec 9 2025

.TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots,
becoming southeast 5 to 10 knots late this evening and overnight.
Seas 3 to 4 feet. Wave Detail: East 3 feet at 9 seconds and north
1 foot at 9 seconds. Isolated showers.
.WEDNESDAY...East winds 10 to 15 knots with gusts up to 25 knots.
Seas 3 to 4 feet. Wave Detail: East 4 feet at 8 seconds and north
2 feet at 14 seconds.
.WEDNESDAY NIGHT...East winds 10 to 15 knots, diminishing to 5 to
10 knots after midnight. Seas 4 to 5 feet. Wave Detail: East 4 feet
at 6 seconds and north 2 feet at 13 seconds.
.THURSDAY...East winds 10 to 15 knots with gusts up to 20 knots.
Seas 4 to 6 feet. Wave Detail: East 4 feet at 6 seconds and north
3 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 6 seconds
and north 4 feet at 11 seconds.
.FRIDAY...East winds 10 to 15 knots, increasing to 15 to 20 knots in
the afternoon. Seas 5 to 6 feet. Wave Detail: East 4 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. Scattered showers.
.SATURDAY...East winds 10 to 15 knots, increasing to 15 to 20 knots
in the afternoon. Seas 5 to 6 feet.
.SATURDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to
15 knots after midnight. Seas 5 to 6 feet. Scattered showers.
.SUNDAY...East winds 10 to 15 knots. Seas around 5 feet. Scattered
showers in the afternoon.
.SUNDAY NIGHT...East winds 10 to 15 knots, becoming southeast 5 to
10 knots after midnight. Seas 4 to 5 feet.

$$

AMZ716-100800-
Coastal Waters from Cabo San Juan to the waters between Anegada
Island and Virgin Gorda and North 10 NM-
301 PM AST Tue Dec 9 2025

.TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas
3 to 4 feet. Wave Detail: Southeast 3 feet at 5 seconds and north
2 feet at 12 seconds. Isolated showers early this afternoon.
Isolated showers this evening, then scattered showers after
midnight.
.WEDNESDAY...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 in the morning.
.WEDNESDAY NIGHT...East winds 15 to 20 knots with gusts up to
25 knots. Seas 4 to 5 feet. Wave Detail: East 4 feet at 5 seconds
and northeast 2 feet at 13 seconds.
.THURSDAY...East winds 15 to 20 knots with gusts up to 25 knots.
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 4 to 6 feet. Wave Detail: East 4 feet at 6 seconds
and north 4 feet at 11 seconds. Scattered showers.
.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 4 to 6 feet.
.SATURDAY...East winds 15 to 20 knots. Seas 4 to 6 feet. Scattered
showers.
.SATURDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 6 feet.
Scattered 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.

$$

AMZ723-100800-
Anegada Passage east of Virgin Gorda and Saint Croix south to 17N-
301 PM AST Tue Dec 9 2025

.TONIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas
4 to 5 feet. Wave Detail: Southeast 5 feet at 6 seconds and north
2 feet at 13 seconds. Isolated showers late this evening. Scattered
showers after midnight.
.WEDNESDAY...East winds 15 to 20 knots with gusts up to 30 knots.
Seas 4 to 6 feet. Wave Detail: East 6 feet at 6 seconds and north
2 feet at 14 seconds. Scattered showers in the morning.
.WEDNESDAY NIGHT...East winds 15 to 20 knots with gusts up to
30 knots. Seas 5 to 6 feet. Wave Detail: East 6 feet at 6 seconds
and north 2 feet at 13 seconds.
.THURSDAY...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.
.THURSDAY 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
and north 2 feet at 14 seconds. Scattered showers.
.FRIDAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas
6 to 7 feet. Wave Detail: East 6 feet at 7 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.
.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 5 to 6 feet.
.SUNDAY NIGHT...East winds 10 to 15 knots. Seas 5 to 6 feet.
Scattered showers.

$$

AMZ726-100800-
Coastal waters east of Puerto Rico, around Vieques, and around and
just north of Culebra and Saint John-
301 PM AST Tue Dec 9 2025

.TONIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet. Wave Detail:
Southeast 4 feet at 7 seconds. Isolated showers this afternoon and
evening, then scattered showers after midnight.
.WEDNESDAY...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 in the morning.
.WEDNESDAY 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.
.THURSDAY...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.
.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.
Scattered showers.
.FRIDAY...East winds 15 to 20 knots, diminishing to 10 to 15 knots
in the afternoon. 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 4 to 6 feet.
.SATURDAY...East winds 15 to 20 knots. Seas 4 to 6 feet. Scattered
showers in the morning.
.SATURDAY NIGHT...East winds 15 to 20 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 3 to 5 feet.
Scattered showers.

$$

AMZ733-100800-
Caribbean waters of Puerto Rico from 10 NM to 17N, including the
coastal waters of Saint Croix-
301 PM AST Tue Dec 9 2025

.TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas
around 4 feet. Wave Detail: Southeast 4 feet at 7 seconds. Scattered
showers this afternoon. Isolated showers this evening, then
scattered showers after midnight.
.WEDNESDAY...East winds 10 to 15 knots, increasing to 15 to 20 knots
in the afternoon. Gusts up to 30 knots. Seas 4 to 5 feet. Wave
Detail: East 5 feet at 7 seconds. Scattered showers.
.WEDNESDAY 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.
.THURSDAY...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 in the morning.
.THURSDAY 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.
.FRIDAY...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.
.FRIDAY NIGHT...East winds 15 to 20 knots with gusts up to 25 knots.
Seas 5 to 6 feet. Scattered showers.
.SATURDAY...East winds 15 to 20 knots. Seas 5 to 6 feet.
.SATURDAY NIGHT...East winds around 20 knots. Seas 6 to 7 feet.
.SUNDAY...East winds 15 to 20 knots. Seas 6 to 7 feet.
.SUNDAY NIGHT...East winds 10 to 15 knots. Seas 4 to 6 feet.

$$

AMZ735-100800-
Coastal Waters of Southern Puerto Rico out 10 NM-
301 PM AST Tue Dec 9 2025

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

$$

AMZ741-100800-
Mona Passage Southward to 17N-
301 PM AST Tue Dec 9 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION...

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

$$

AMZ742-100800-
Coastal Waters of Northwestern Puerto Rico out 10 NM-
301 PM AST Tue Dec 9 2025

.TONIGHT...Northeast winds around 5 knots, becoming east early this
evening, then increasing to 5 to 10 knots late this evening and
overnight. Seas 2 to 3 feet. Wave Detail: Northeast 2 feet at
7 seconds and north 1 foot at 8 seconds. Scattered showers early
this afternoon, then numerous showers early. Isolated showers this
evening.
.WEDNESDAY...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.
.WEDNESDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Southeast 2 feet at 6 seconds and north 2 feet at
14 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.
.THURSDAY NIGHT...East winds around 5 knots, increasing to 10 to
15 knots with gusts up to 20 knots after midnight. Seas 3 to 5 feet.
Wave Detail: North 4 feet at 12 seconds and southeast 2 feet at
6 seconds.
.FRIDAY...East winds 5 to 10 knots, increasing to 10 to 15 knots in
the afternoon. Seas 3 to 5 feet. Wave Detail: East 3 feet at
6 seconds and north 3 feet at 11 seconds. Scattered showers in the
afternoon.
.FRIDAY NIGHT...East winds 5 to 10 knots. Seas 3 to 5 feet.
.SATURDAY...East winds 10 to 15 knots. Seas 3 to 5 feet. Scattered
showers in the afternoon.
.SATURDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to
15 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 5 to 10 knots. Seas 2 to 4 feet.

$$

AMZ745-100800-
Coastal Waters of Southwestern Puerto Rico out 10 NM-
301 PM AST Tue Dec 9 2025

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

$$