469
FZCA52 TJSJ 160755
CWFSJU

Coastal Waters Forecast
National Weather Service San Juan PR
355 AM AST Tue Sep 16 2025

Puerto Rico and the U.S. Virgin Islands Waters

AMZ700-162030-
355 AM AST Tue Sep 16 2025

.SYNOPSIS FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS WATERS...
A surface high pressure system located over the central and eastern
Atlantic, in combination with a departing low-level perturbation,
will promote moderate to locally fresh east to northeasterly winds
today. Small craft are urged to exercise caution across the offshore
waters and local passages. Passing showers and isolated thunderstorms
will continue through the morning hours across most waters, followed
by stronger thunderstorms across the western waters of Puerto Rico
and the Mona Passage during the early afternoon hours. A stronger
tropical wave is expected to approach late tonight into Wednesday,
enhancing intensity and shower coverage.

$$

AMZ711-162030-
Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N-
355 AM AST Tue Sep 16 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.TODAY...East winds 15 to 20 knots, diminishing to 10 to 15 knots
late. Seas around 5 feet. Wave Detail: East 5 feet at 8 seconds and
north 1 foot at 9 seconds. Isolated thunderstorms early this
morning. Scattered showers until late afternoon. Isolated showers
late.
.TONIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas
around 5 feet. Wave Detail: East 5 feet at 8 seconds and north
1 foot at 8 seconds. Scattered showers in the evening, then numerous
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 6 feet. Wave
Detail: East 6 feet at 8 seconds and northwest 1 foot at 10 seconds.
Numerous showers.
.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 8 seconds
and northwest 1 foot at 9 seconds. Numerous showers, mainly in the
evening.
.THURSDAY...East winds 10 to 15 knots with gusts up to 20 knots.
Seas 5 to 6 feet. Wave Detail: East 5 feet at 8 seconds and
northwest 1 foot at 8 seconds. Scattered showers.
.THURSDAY NIGHT...East winds 10 to 15 knots with gusts up to
20 knots. Seas 4 to 5 feet. Wave Detail: East 5 feet at 8 seconds
and northwest 1 foot at 8 seconds. Scattered showers in the evening,
then numerous showers after midnight.
.FRIDAY...East winds 10 to 15 knots. Seas 4 to 5 feet. Scattered
showers in the morning.
.FRIDAY NIGHT...East winds 10 to 15 knots, diminishing to 5 to
10 knots after midnight. Seas 4 to 5 feet. Scattered showers.
.SATURDAY...East winds 5 to 10 knots. Seas 4 to 6 feet.
.SATURDAY NIGHT...Northeast winds 5 to 10 knots. Seas 4 to 6 feet.
Scattered showers.

Winds and seas higher in and near thunderstorms.

$$

AMZ712-162030-
Coastal Waters of Northern Puerto Rico out 10 NM-
355 AM AST Tue Sep 16 2025

.TODAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas
4 to 5 feet. Wave Detail: Northeast 4 feet at 8 seconds and north
1 foot at 8 seconds. Scattered showers this morning. Isolated
thunderstorms late this morning, then isolated showers this
afternoon.
.TONIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas
4 to 5 feet. Wave Detail: Northeast 4 feet at 8 seconds and north
1 foot at 9 seconds. Numerous showers.
.WEDNESDAY...East winds 5 to 10 knots, increasing to 10 to 15 knots
in the afternoon. Seas around 4 feet. Wave Detail: Northeast 4 feet
at 8 seconds and northwest 1 foot at 11 seconds. Numerous showers.
.WEDNESDAY NIGHT...East winds 10 to 15 knots, diminishing to 5 to
10 knots after midnight. Seas 4 to 5 feet. Wave Detail: Northeast
4 feet at 8 seconds and northwest 1 foot at 10 seconds. Scattered
showers in the evening, then numerous showers after midnight.
.THURSDAY...East winds 5 to 10 knots, increasing to 10 to 15 knots
in the afternoon. Seas 4 to 5 feet. Wave Detail: Northeast 4 feet at
8 seconds and northwest 1 foot at 8 seconds. Numerous showers.
.THURSDAY NIGHT...East winds 5 to 10 knots. Seas around 4 feet. Wave
Detail: Northeast 4 feet at 8 seconds and northwest 1 foot at
8 seconds. Numerous showers.
.FRIDAY...East winds 5 to 10 knots, increasing to 10 to 15 knots in
the afternoon. Seas 3 to 4 feet. Scattered showers in the afternoon.
.FRIDAY NIGHT...East winds 5 to 10 knots. Seas 3 to 4 feet.
Scattered showers.
.SATURDAY...East winds 5 to 10 knots, becoming northeast 10 to
15 knots in the afternoon. Seas 3 to 4 feet.
.SATURDAY NIGHT...East winds 5 to 10 knots, diminishing to around
5 knots after midnight. Seas 3 to 4 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ716-162030-
Coastal Waters from Cabo San Juan to the waters between Anegada
Island and Virgin Gorda and North 10 NM-
355 AM AST Tue Sep 16 2025

.TODAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas
3 to 4 feet. Wave Detail: Northeast 4 feet at 7 seconds. Isolated
thunderstorms this morning. Scattered showers until late afternoon,
then isolated showers late.
.TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas
3 to 4 feet. Wave Detail: East 4 feet at 8 seconds and north 1 foot
at 8 seconds. Scattered showers in the evening, then numerous
showers after midnight.
.WEDNESDAY...East winds 10 to 15 knots with gusts up to 20 knots.
Seas 2 to 4 feet. Wave Detail: East 4 feet at 8 seconds and north
1 foot at 8 seconds. Numerous showers.
.WEDNESDAY NIGHT...East winds 15 to 20 knots with gusts up to
25 knots. Seas 3 to 5 feet. Wave Detail: East 4 feet at 8 seconds
and northwest 1 foot at 10 seconds. Numerous showers, mainly in the
evening.
.THURSDAY...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
northwest 1 foot at 9 seconds. Scattered showers.
.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
and northwest 1 foot at 8 seconds. Scattered showers.
.FRIDAY...East winds 10 to 15 knots. Seas around 3 feet. Scattered
showers in the morning.
.FRIDAY NIGHT...East winds around 10 knots. Seas around 3 feet.
.SATURDAY...East winds 5 to 10 knots. Seas around 3 feet. Scattered
showers in the morning.
.SATURDAY NIGHT...Northeast winds 5 to 10 knots. Seas 2 to 3 feet.
Scattered showers.

Winds and seas higher in and near thunderstorms.

$$

AMZ723-162030-
Anegada Passage east of Virgin Gorda and Saint Croix south to 17N-
355 AM AST Tue Sep 16 2025

.TODAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas
4 to 5 feet. Wave Detail: East 5 feet at 6 seconds. Scattered
showers with isolated thunderstorms early this morning, then
isolated showers late this morning and afternoon.
.TONIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet. Wave Detail:
East 4 feet at 8 seconds. Scattered showers.
.WEDNESDAY...East winds 10 to 15 knots with gusts up to 20 knots.
Seas 3 to 4 feet. Wave Detail: Southeast 4 feet at 8 seconds.
Numerous showers.
.WEDNESDAY NIGHT...East winds 10 to 15 knots with gusts up to
25 knots. Seas 3 to 5 feet. Wave Detail: East 5 feet at 8 seconds
and northeast 1 foot at 12 seconds. Numerous showers, mainly in the
evening.
.THURSDAY...East winds 10 to 15 knots with gusts up to 20 knots.
Seas 4 to 5 feet. Wave Detail: East 5 feet at 7 seconds and
northeast 1 foot at 12 seconds. Scattered showers.
.THURSDAY NIGHT...East winds 10 to 15 knots with gusts up to
20 knots. Seas around 4 feet. Wave Detail: East 4 feet at 7 seconds
and northeast 1 foot at 11 seconds. Scattered showers.
.FRIDAY...East winds 10 to 15 knots. Seas around 4 feet.
.FRIDAY NIGHT...East winds around 10 knots. Seas 4 to 5 feet.
.SATURDAY...East winds 5 to 10 knots. Seas 4 to 5 feet.
.SATURDAY NIGHT...Northeast winds 5 to 10 knots. Seas 3 to 5 feet.
Scattered showers.

Winds and seas higher in and near thunderstorms.

$$

AMZ726-162030-
Coastal waters east of Puerto Rico, around Vieques, and around and
just north of Culebra and Saint John-
355 AM AST Tue Sep 16 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.TODAY...East winds 15 to 20 knots, diminishing to 10 to 15 knots
this afternoon. Seas 3 to 4 feet. Wave Detail: East 4 feet at
6 seconds. Scattered showers with isolated thunderstorms this
morning, then isolated showers this afternoon.
.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 in the evening, then numerous showers after midnight.
.WEDNESDAY...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: East 3 feet at 8 seconds. Numerous showers.
.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.
Scattered showers in the evening, then numerous showers after
midnight.
.THURSDAY...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 in the morning, then numerous showers in the afternoon.
.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.
Scattered showers.
.FRIDAY...East winds 10 to 15 knots. Seas around 3 feet. Scattered
showers.
.FRIDAY NIGHT...East winds around 10 knots. Seas around 3 feet.
Scattered showers.
.SATURDAY...East winds 5 to 10 knots. Seas 2 to 4 feet. Scattered
showers.
.SATURDAY NIGHT...Northeast winds 5 to 10 knots. Seas 2 to 4 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ733-162030-
Caribbean waters of Puerto Rico from 10 NM to 17N, including the
coastal waters of Saint Croix-
355 AM AST Tue Sep 16 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: East 5 feet at 6 seconds.
Scattered showers with isolated thunderstorms until late afternoon,
then isolated showers late.
.TONIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas
around 4 feet. Wave Detail: East 4 feet at 6 seconds. Scattered
showers.
.WEDNESDAY...East winds 5 to 10 knots. Seas 3 to 4 feet. Wave
Detail: East 4 feet at 7 seconds. Scattered showers in the morning,
then numerous showers in the afternoon.
.WEDNESDAY NIGHT...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.
Scattered showers.
.THURSDAY...East winds 10 to 15 knots with gusts up to 20 knots.
Seas 3 to 4 feet. Wave Detail: Southeast 4 feet at 7 seconds.
Scattered showers.
.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.
Scattered showers.
.FRIDAY...East winds 10 to 15 knots. Seas 3 to 4 feet. Scattered
showers in the morning.
.FRIDAY NIGHT...East winds around 10 knots. Seas around 3 feet.
Scattered showers.
.SATURDAY...East winds 10 to 15 knots, diminishing to 5 to 10 knots
in the afternoon. Seas around 3 feet. Scattered showers in the
morning.
.SATURDAY NIGHT...East winds 5 to 10 knots. Seas around 3 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ735-162030-
Coastal Waters of Southern Puerto Rico out 10 NM-
355 AM AST Tue Sep 16 2025

.TODAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas
2 to 4 feet. Wave Detail: East 4 feet at 6 seconds. Scattered
showers with isolated thunderstorms this morning, then isolated
showers this afternoon.
.TONIGHT...East winds 10 to 15 knots, becoming northeast 5 to
10 knots after midnight. Seas 2 to 4 feet. Wave Detail: East 4 feet
at 6 seconds. Scattered showers after midnight.
.WEDNESDAY...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: East 3 feet at 6 seconds. Scattered showers.
.WEDNESDAY NIGHT...East winds 10 to 15 knots with gusts up to
20 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 6 seconds.
Scattered showers after midnight.
.THURSDAY...East winds 10 to 15 knots with gusts up to 20 knots.
Seas 2 to 3 feet. Wave Detail: East 3 feet at 5 seconds. Scattered
showers.
.THURSDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: East 3 feet at 5 seconds. Scattered showers.
.FRIDAY...East winds 10 to 15 knots. Seas 2 to 3 feet. Scattered
showers.
.FRIDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet.
Scattered showers.
.SATURDAY...East winds 5 to 10 knots. Seas 2 to 3 feet. Scattered
showers in the morning.
.SATURDAY NIGHT...Northeast winds 5 to 10 knots. Seas 2 to 3 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ741-162030-
Mona Passage Southward to 17N-
355 AM AST Tue Sep 16 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.TODAY...East winds 15 to 20 knots, diminishing to 10 to 15 knots
late. Seas 3 to 5 feet. Wave Detail: East 5 feet at 6 seconds and
north 1 foot at 8 seconds. Numerous showers with isolated
thunderstorms.
.TONIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas
3 to 5 feet. Wave Detail: Northeast 4 feet at 7 seconds. Scattered
showers.
.WEDNESDAY...East winds 10 to 15 knots with gusts up to 20 knots,
diminishing to 5 to 10 knots in the afternoon. Seas 3 to 4 feet.
Wave Detail: East 4 feet at 6 seconds and north 1 foot at 9 seconds.
Scattered showers in the afternoon.
.WEDNESDAY NIGHT...East winds 5 to 10 knots, increasing to 10 to
15 knots after midnight. Seas around 3 feet. Wave Detail: East
3 feet at 6 seconds and north 1 foot at 9 seconds. Scattered showers
after midnight.
.THURSDAY...Southeast 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 1 foot at 8 seconds. Scattered showers.
.THURSDAY NIGHT...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
and north 1 foot at 8 seconds. Scattered showers.
.FRIDAY...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. Numerous
showers, mainly in the morning.
.FRIDAY NIGHT...East winds 5 to 10 knots. Seas around 3 feet.
.SATURDAY...East winds 10 to 15 knots, becoming southeast 5 to
10 knots in the afternoon. Seas around 3 feet.
.SATURDAY NIGHT...East winds 5 to 10 knots. Seas around 3 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ742-162030-
Coastal Waters of Northwestern Puerto Rico out 10 NM-
355 AM AST Tue Sep 16 2025

.TODAY...East winds 10 to 15 knots with gusts up to 25 knots,
diminishing to 5 to 10 knots with gusts up to 20 knots this
afternoon. Seas 2 to 4 feet. Wave Detail: North 3 feet at 7 seconds.
Showers with isolated thunderstorms this afternoon.
.TONIGHT...East winds 15 to 20 knots, diminishing to 10 to 15 knots
after midnight. Seas 2 to 4 feet. Wave Detail: Northeast 3 feet at
5 seconds and north 1 foot at 8 seconds.
.WEDNESDAY...East winds 10 to 15 knots, diminishing to around
5 knots in the afternoon. Seas 2 to 3 feet. Wave Detail: Northeast
3 feet at 6 seconds and north 1 foot at 10 seconds. Scattered
showers in the morning, then showers in the afternoon.
.WEDNESDAY NIGHT...East winds around 5 knots, increasing to 5 to
10 knots after midnight. Seas 2 to 3 feet. Wave Detail: Northeast
2 feet at 6 seconds and northwest 1 foot at 10 seconds. Numerous
showers in the evening.
.THURSDAY...Southeast winds 5 to 10 knots. Seas 2 to 4 feet. Wave
Detail: Northeast 3 feet at 6 seconds and north 1 foot at 9 seconds.
Numerous showers in the afternoon.
.THURSDAY NIGHT...East winds around 5 knots. Seas 2 to 3 feet. Wave
Detail: Northeast 3 feet at 7 seconds and northeast 1 foot at
11 seconds. Numerous showers in the evening.
.FRIDAY...Southeast winds 5 to 10 knots. Seas 2 to 3 feet. Numerous
showers in the afternoon.
.FRIDAY NIGHT...East winds around 5 knots. Seas 2 to 3 feet.
.SATURDAY...Southeast winds around 5 knots, becoming south in the
afternoon. Seas 2 to 3 feet.
.SATURDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ745-162030-
Coastal Waters of Southwestern Puerto Rico out 10 NM-
355 AM AST Tue Sep 16 2025

.TODAY...East winds 5 to 10 knots, increasing to 10 to 15 knots with
gusts up to 20 knots this afternoon. Seas around 2 feet. Wave
Detail: Southeast 2 feet at 5 seconds and northwest 1 foot at
8 seconds. Isolated showers early this morning. Showers with
isolated thunderstorms this afternoon.
.TONIGHT...Northeast winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: East 2 feet at 5 seconds and northwest 1 foot at 7 seconds.
Scattered showers in the evening.
.WEDNESDAY...East winds around 5 knots. Seas around 2 feet. Wave
Detail: Southeast 2 feet at 5 seconds and north 1 foot at 9 seconds.
Scattered showers in the morning, then numerous showers in the
afternoon.
.WEDNESDAY NIGHT...East winds 5 to 10 knots, increasing to 10 to
15 knots with gusts up to 20 knots after midnight. Seas around
2 feet. Wave Detail: Southeast 2 feet at 5 seconds and northwest
1 foot at 9 seconds. Scattered showers in the evening.
.THURSDAY...Southeast winds 10 to 15 knots with gusts up to
20 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at
4 seconds and northwest 1 foot at 9 seconds. Scattered showers in
the afternoon.
.THURSDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Southeast 2 feet at 4 seconds and north 1 foot at 8 seconds.
Scattered showers after midnight.
.FRIDAY...East winds 5 to 10 knots, becoming southeast 10 to
15 knots in the afternoon. Seas 2 to 3 feet. Scattered showers.
.FRIDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet.
.SATURDAY...Southeast winds 5 to 10 knots. Seas around 2 feet.
Scattered showers in the afternoon.
.SATURDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet.

Winds and seas higher in and near thunderstorms.

$$