747
FZCA52 TJSJ 310901
CWFSJU

Coastal Waters Forecast
National Weather Service San Juan PR
501 AM AST Sun Aug 31 2025

Puerto Rico and the U.S. Virgin Islands Waters

AMZ700-312130-
501 AM AST Sun Aug 31 2025

.SYNOPSIS FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS WATERS...
Local effects and sea breeze variations will promote the development
of strong thunderstorms across the western side of the islands that
can move towards nearby waters. A weak tropical wave moving across
the Caribbean Sea, and a surface high pressure system across the
Atlantic Ocean will promote moderate easterly winds with moderate
chop across the regional waters through early next week.

$$

AMZ711-312130-
Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N-
501 AM AST Sun Aug 31 2025

.TODAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas
around 3 feet. Wave Detail: East 3 feet at 7 seconds. Isolated
showers.
.TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas
2 to 3 feet. Wave Detail: East 3 feet at 7 seconds. Scattered
showers after midnight.
.MONDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas
2 to 3 feet. Wave Detail: East 3 feet at 7 seconds.
.MONDAY 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.
.TUESDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas
around 3 feet. Wave Detail: East 3 feet at 5 seconds.
.TUESDAY NIGHT...East winds 10 to 15 knots with gusts up to
25 knots. Seas 3 to 4 feet. Wave Detail: East 3 feet at 6 seconds.
.WEDNESDAY...East winds 10 to 15 knots. Seas around 3 feet.
.WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet.
.THURSDAY...East winds 10 to 15 knots. Seas 3 to 4 feet.
.THURSDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet.

$$

AMZ712-312130-
Coastal Waters of Northern Puerto Rico out 10 NM-
501 AM AST Sun Aug 31 2025

.TODAY...East winds 5 to 10 knots, increasing to 10 to 15 knots with
gusts up to 25 knots this afternoon. Seas 2 to 3 feet. Wave Detail:
East 3 feet at 7 seconds. Isolated showers.
.TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots,
diminishing to 5 to 10 knots after midnight. Seas 2 to 3 feet. Wave
Detail: East 3 feet at 5 seconds. Scattered showers in the evening.
.MONDAY...East winds 5 to 10 knots, increasing to 10 to 15 knots
with gusts up to 20 knots in the afternoon. Seas 2 to 3 feet. Wave
Detail: East 2 feet at 6 seconds.
.MONDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: East 2 feet at 5 seconds.
.TUESDAY...East winds 5 to 10 knots, increasing to 10 to 15 knots
with gusts up to 25 knots in the afternoon. Seas 2 to 3 feet. Wave
Detail: East 3 feet at 5 seconds. Scattered showers in the
afternoon.
.TUESDAY NIGHT...East winds 10 to 15 knots with gusts up to
20 knots, diminishing to 5 to 10 knots after midnight. Seas 2 to
3 feet. Wave Detail: East 3 feet at 6 seconds.
.WEDNESDAY...East winds 10 to 15 knots. Seas 2 to 3 feet. Scattered
showers.
.WEDNESDAY NIGHT...East winds 10 to 15 knots, diminishing to 5 to
10 knots after midnight. Seas around 3 feet.
.THURSDAY...East winds 5 to 10 knots, increasing to 10 to 15 knots
in the afternoon. Seas around 3 feet.
.THURSDAY NIGHT...East winds 10 to 15 knots, diminishing to 5 to
10 knots after midnight. Seas 3 to 4 feet.

$$

AMZ716-312130-
Coastal Waters from Cabo San Juan to the waters between Anegada
Island and Virgin Gorda and North 10 NM-
501 AM AST Sun Aug 31 2025

.TODAY...East winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail:
East 3 feet at 5 seconds. Isolated showers early this morning.
Scattered showers late this morning, then isolated showers this
afternoon.
.TONIGHT...East winds around 10 knots. Seas around 2 feet. Wave
Detail: East 2 feet at 6 seconds. Scattered showers.
.MONDAY...East winds around 10 knots. Seas around 2 feet. Wave
Detail: East 2 feet at 6 seconds. Scattered showers in the morning.
.MONDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots.
Seas around 2 feet. Wave Detail: East 2 feet at 4 seconds.
.TUESDAY...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.
.TUESDAY NIGHT...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.
.WEDNESDAY...East winds 10 to 15 knots. Seas 2 to 3 feet.
.WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.
.THURSDAY...East winds 10 to 15 knots. Seas 2 to 3 feet.
.THURSDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.

$$

AMZ723-312130-
Anegada Passage east of Virgin Gorda and Saint Croix south to 17N-
501 AM AST Sun Aug 31 2025

.TODAY...East winds 10 to 15 knots. Seas around 3 feet. Wave Detail:
East 3 feet at 5 seconds. Isolated showers until late afternoon,
then scattered showers late.
.TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas
2 to 3 feet. Wave Detail: East 2 feet at 5 seconds.
.MONDAY...East winds around 10 knots. Seas around 2 feet. Wave
Detail: East 2 feet at 5 seconds.
.MONDAY NIGHT...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.
.TUESDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas
around 3 feet. Wave Detail: East 3 feet at 5 seconds. Scattered
showers in the morning.
.TUESDAY NIGHT...East winds 10 to 15 knots with gusts up to
20 knots. Seas around 3 feet. Wave Detail: East 3 feet at 6 seconds.
.WEDNESDAY...East winds 10 to 15 knots. Seas around 3 feet.
.WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas around 3 feet.
.THURSDAY...East winds 10 to 15 knots. Seas around 3 feet.
.THURSDAY NIGHT...East winds 10 to 15 knots. Seas around 3 feet.

$$

AMZ726-312130-
Coastal waters east of Puerto Rico, around Vieques, and around and
just north of Culebra and Saint John-
501 AM AST Sun Aug 31 2025

.TODAY...East winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail:
East 3 feet at 6 seconds. Scattered showers, mainly this morning.
.TONIGHT...East winds around 10 knots. Seas around 2 feet. Wave
Detail: East 2 feet at 5 seconds. Scattered showers.
.MONDAY...East winds around 10 knots. Seas around 2 feet. Wave
Detail: East 2 feet at 5 seconds. Scattered showers in the morning.
.MONDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots.
Seas around 2 feet. Wave Detail: East 2 feet at 5 seconds.
.TUESDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas
2 to 3 feet. Wave Detail: East 3 feet at 4 seconds.
.TUESDAY NIGHT...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.
.WEDNESDAY...East winds 10 to 15 knots. Seas 2 to 3 feet.
.WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.
.THURSDAY...East winds 10 to 15 knots. Seas 2 to 3 feet.
.THURSDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.
Scattered showers.

$$

AMZ733-312130-
Caribbean waters of Puerto Rico from 10 NM to 17N, including the
coastal waters of Saint Croix-
501 AM AST Sun Aug 31 2025

.TODAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas
around 3 feet. Wave Detail: East 3 feet at 6 seconds. Scattered
showers, mainly this morning.
.TONIGHT...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.
.MONDAY...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.
.MONDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots.
Seas around 2 feet. Wave Detail: East 2 feet at 5 seconds.
.TUESDAY...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.
.TUESDAY NIGHT...East winds 10 to 15 knots with gusts up to
20 knots. Seas around 3 feet. Wave Detail: East 3 feet at 5 seconds.
Scattered showers.
.WEDNESDAY...East winds 10 to 15 knots. Seas around 3 feet.
.WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas around 3 feet.
.THURSDAY...East winds 10 to 15 knots. Seas around 3 feet.
.THURSDAY NIGHT...East winds 10 to 15 knots. Seas around 3 feet.
Scattered showers.

$$

AMZ735-312130-
Coastal Waters of Southern Puerto Rico out 10 NM-
501 AM AST Sun Aug 31 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 2 to
3 feet. Wave Detail: East 3 feet at 5 seconds. Scattered showers,
mainly this morning.
.TONIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail:
East 2 feet at 5 seconds. Scattered showers after midnight.
.MONDAY...East winds 5 to 10 knots, increasing to 10 to 15 knots in
the afternoon. Seas around 2 feet. Wave Detail: East 2 feet at
5 seconds.
.MONDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: East 2 feet at 5 seconds.
.TUESDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas
around 2 feet. Wave Detail: East 2 feet at 5 seconds.
.TUESDAY NIGHT...East winds 10 to 15 knots with gusts up to
20 knots. Seas 2 to 3 feet. Wave Detail: East 2 feet at 5 seconds.
.WEDNESDAY...East winds 10 to 15 knots. Seas 2 to 3 feet. Scattered
showers in the morning.
.WEDNESDAY NIGHT...East winds 10 to 15 knots, diminishing to 5 to
10 knots after midnight. Seas 2 to 3 feet.
.THURSDAY...East winds 5 to 10 knots, increasing to 10 to 15 knots
in the afternoon. Seas 2 to 3 feet.
.THURSDAY NIGHT...East winds 10 to 15 knots, diminishing to 5 to
10 knots after midnight. Seas 2 to 3 feet.

$$

AMZ741-312130-
Mona Passage Southward to 17N-
501 AM AST Sun Aug 31 2025

.TODAY...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, mainly this morning.
.TONIGHT...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. Numerous showers
after midnight.
.MONDAY...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.
.MONDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: East 3 feet at 5 seconds.
.TUESDAY...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.
.TUESDAY NIGHT...East winds 10 to 15 knots with gusts up to
20 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at
6 seconds.
.WEDNESDAY...East winds 10 to 15 knots. Seas around 3 feet.
.WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas around 3 feet.
.THURSDAY...East winds 10 to 15 knots. Seas around 3 feet.
.THURSDAY NIGHT...East winds 10 to 15 knots. Seas around 3 feet.

$$

AMZ742-312130-
Coastal Waters of Northwestern Puerto Rico out 10 NM-
501 AM AST Sun Aug 31 2025

.TODAY...East winds 5 to 10 knots, becoming southeast late this
morning, then becoming northeast early this afternoon, increasing to
5 to 10 knots late. Seas around 2 feet. Wave Detail: Northeast
2 feet at 7 seconds. Numerous showers with isolated thunderstorms
this afternoon.
.TONIGHT...East winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Northeast 2 feet at 6 seconds. Scattered showers in the
evening.
.MONDAY...East winds 5 to 10 knots, becoming northeast in the
afternoon. Seas around 2 feet. Wave Detail: Northeast 2 feet at
5 seconds. Numerous showers in the afternoon.
.MONDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Northeast 1 foot at 5 seconds.
.TUESDAY...East winds around 5 knots. Seas around 2 feet. Wave
Detail: East 1 foot at 5 seconds. Numerous showers in the afternoon.
.TUESDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: East 2 feet at 6 seconds.
.WEDNESDAY...East winds around 5 knots. Seas around 2 feet.
Scattered showers in the afternoon.
.WEDNESDAY NIGHT...East winds around 5 knots. Seas 2 to 3 feet.
.THURSDAY...East winds 5 to 10 knots. Seas 2 to 3 feet. Scattered
showers in the afternoon.
.THURSDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ745-312130-
Coastal Waters of Southwestern Puerto Rico out 10 NM-
501 AM AST Sun Aug 31 2025

.TODAY...East winds 5 to 10 knots. Seas 1 foot or less, then around
2 feet this afternoon. Wave Detail: Southeast 1 foot at 5 seconds,
becoming southeast 1 foot at 4 seconds. Isolated showers this
morning. Scattered showers with isolated thunderstorms early this
afternoon, then isolated showers late.
.TONIGHT...East winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Southeast 1 foot at 4 seconds.
.MONDAY...Southeast winds 5 to 10 knots, increasing to 10 to
15 knots in the afternoon. Seas around 2 feet. Wave Detail:
Southeast 2 feet at 4 seconds. Scattered showers in the afternoon.
.MONDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Southeast 1 foot at 4 seconds.
.TUESDAY...East winds 5 to 10 knots, becoming southeast 10 to
15 knots in the afternoon. Seas around 2 feet. Wave Detail:
Southeast 2 feet at 4 seconds. Scattered showers in the afternoon.
.TUESDAY 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 4 seconds.
.WEDNESDAY...East winds 5 to 10 knots, becoming southeast 10 to
15 knots in the afternoon. Seas around 2 feet. Scattered showers in
the afternoon.
.WEDNESDAY NIGHT...East winds 10 to 15 knots, diminishing to 5 to
10 knots after midnight. Seas 2 to 3 feet.
.THURSDAY...East winds 5 to 10 knots. Seas around 2 feet. Scattered
showers in the afternoon.
.THURSDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet.

Winds and seas higher in and near thunderstorms.

$$