613
FZCA52 TJSJ 090812
CWFSJU

Coastal Waters Forecast
National Weather Service San Juan PR
412 AM AST Tue Dec 9 2025

Puerto Rico and the U.S. Virgin Islands Waters

AMZ700-092045-
412 AM 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.

$$

AMZ711-092045-
Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N-
412 AM AST Tue Dec 9 2025

.TODAY...Southeast winds 10 to 15 knots with gusts up to 20 knots.
Seas 4 to 5 feet. Wave Detail: East 4 feet at 9 seconds and north
2 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 20 knots. Seas
4 to 5 feet. Wave Detail: East 4 feet at 8 seconds and north 2 feet
at 15 seconds. Scattered showers after midnight.
.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. Scattered showers after midnight.
.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.
.FRIDAY...East winds around 15 knots. Seas 6 to 7 feet.
.FRIDAY NIGHT...East winds 15 to 20 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.

$$

AMZ712-092045-
Coastal Waters of Northern Puerto Rico out 10 NM-
412 AM AST Tue Dec 9 2025

.TODAY...Southeast winds 5 to 10 knots, becoming east 10 to 15 knots
with gusts up to 20 knots this afternoon. Seas 3 to 4 feet. Wave
Detail: East 3 feet at 9 seconds and north 1 foot at 9 seconds.
Scattered showers, mainly this morning.
.TONIGHT...Southeast winds 5 to 10 knots. Seas 3 to 4 feet. Wave
Detail: East 3 feet at 9 seconds and north 1 foot at 9 seconds.
.WEDNESDAY...East winds 5 to 10 knots, increasing to 10 to 15 knots
in the afternoon. 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 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 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. Seas 5 to 6 feet.
.FRIDAY NIGHT...East winds 10 to 15 knots. Seas 5 to 6 feet.
Scattered showers.
.SATURDAY...East winds 15 to 20 knots. 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.

$$

AMZ716-092045-
Coastal Waters from Cabo San Juan to the waters between Anegada
Island and Virgin Gorda and North 10 NM-
412 AM AST Tue Dec 9 2025

.TODAY...Southeast winds 10 to 15 knots with gusts up to 20 knots.
Seas 3 to 4 feet. Wave Detail: Southeast 3 feet at 8 seconds and
north 2 feet at 9 seconds. Scattered showers early this morning,
then isolated showers late this morning and early afternoon.
.TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas
3 to 4 feet. Wave Detail: Southeast 3 feet at 6 seconds and north
2 feet at 12 seconds. 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.
.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. Scattered showers after
midnight.
.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 around 15 knots with gusts up to
20 knots. Seas 4 to 6 feet. Wave Detail: East 4 feet at 6 seconds
and north 4 feet at 11 seconds.
.FRIDAY...East winds around 15 knots. Seas 4 to 6 feet.
.FRIDAY NIGHT...East winds 15 to 20 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.

$$

AMZ723-092045-
Anegada Passage east of Virgin Gorda and Saint Croix south to 17N-
412 AM AST Tue Dec 9 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.TODAY...East winds 15 to 20 knots, becoming southeast 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 early
this morning.
.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 and north
1 foot at 13 seconds. 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.
.WEDNESDAY NIGHT...East winds 15 to 20 knots with gusts up to
25 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.
.FRIDAY...East winds 15 to 20 knots. Seas 6 to 7 feet.
.FRIDAY NIGHT...East winds 15 to 20 knots. Seas 6 to 7 feet.
.SATURDAY...East winds around 20 knots. Seas 6 to 7 feet. Scattered
showers in the afternoon.
.SATURDAY NIGHT...East winds around 20 knots. Seas 6 to 7 feet.

$$

AMZ726-092045-
Coastal waters east of Puerto Rico, around Vieques, and around and
just north of Culebra and Saint John-
412 AM AST Tue Dec 9 2025

.TODAY...Southeast winds 10 to 15 knots with gusts up to 25 knots.
Seas 3 to 4 feet. Wave Detail: Southeast 4 feet at 7 seconds.
Scattered showers, mainly this morning.
.TONIGHT...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. 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.
.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 after midnight.
.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.
.FRIDAY...East winds around 15 knots. Seas 4 to 6 feet.
.FRIDAY NIGHT...East winds 15 to 20 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.

$$

AMZ733-092045-
Caribbean waters of Puerto Rico from 10 NM to 17N, including the
coastal waters of Saint Croix-
412 AM AST Tue Dec 9 2025

.TODAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas
around 4 feet. Wave Detail: East 4 feet at 7 seconds. Numerous
showers, mainly this morning.
.TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas
around 4 feet. Wave Detail: East 4 feet at 7 seconds.
.WEDNESDAY...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 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.
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.
.FRIDAY...East winds 15 to 20 knots. Seas 5 to 6 feet.
.FRIDAY NIGHT...East winds 15 to 20 knots. Seas 5 to 6 feet.
Scattered showers.
.SATURDAY...East winds around 20 knots. Seas 5 to 6 feet.
.SATURDAY NIGHT...East winds around 20 knots. Seas 6 to 7 feet.

$$

AMZ735-092045-
Coastal Waters of Southern Puerto Rico out 10 NM-
412 AM AST Tue Dec 9 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: Southeast 4 feet at 7 seconds. Scattered
showers early this morning, then numerous showers late this morning.
Isolated showers early this afternoon.
.TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas
3 to 4 feet. Wave Detail: East 3 feet at 7 seconds.
.WEDNESDAY...East winds 5 to 10 knots, increasing to 10 to 15 knots
with gusts up to 25 knots in the afternoon. Seas 3 to 4 feet. Wave
Detail: East 4 feet at 7 seconds.
.WEDNESDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to
15 knots after midnight. Seas 3 to 4 feet. Wave Detail: East 4 feet
at 7 seconds. Scattered showers.
.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
25 knots. Seas 3 to 5 feet. Wave Detail: East 4 feet at 7 seconds.
.FRIDAY...East winds 15 to 20 knots. Seas 3 to 5 feet.
.FRIDAY NIGHT...East winds 10 to 15 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. Seas 4 to 6 feet.

$$

AMZ741-092045-
Mona Passage Southward to 17N-
412 AM AST Tue Dec 9 2025

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

$$

AMZ742-092045-
Coastal Waters of Northwestern Puerto Rico out 10 NM-
412 AM AST Tue Dec 9 2025

.TODAY...East winds around 5 knots. Seas 2 to 3 feet. Wave Detail:
East 2 feet at 8 seconds and north 2 feet at 12 seconds. Isolated
showers early this afternoon. Numerous showers late.
.TONIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail:
Southeast 2 feet at 7 seconds and north 1 foot at 9 seconds.
.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 around 5 knots, increasing to 5 to
10 knots after midnight. Seas 2 to 3 feet. Wave Detail: Southeast
2 feet at 6 seconds and north 2 feet at 14 seconds. Scattered
showers in the evening.
.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, 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. Seas 3 to 5 feet. 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.

$$

AMZ745-092045-
Coastal Waters of Southwestern Puerto Rico out 10 NM-
412 AM AST Tue Dec 9 2025

.TODAY...East winds around 5 knots, becoming southeast 10 to
15 knots with gusts up to 20 knots this afternoon. Seas 2 to 3 feet.
Wave Detail: Southeast 2 feet at 7 seconds and northwest 1 foot at
10 seconds. Isolated showers.
.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 10 seconds.
.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. Scattered showers in the evening.
.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 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. Seas 2 to 4 feet. Scattered
showers in the afternoon.
.FRIDAY NIGHT...East winds 10 to 15 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.

$$