727
FZCA52 TJSJ 091847
CWFSJU

Coastal Waters Forecast
National Weather Service San Juan PR
247 PM AST Tue Sep 9 2025

Puerto Rico and the U.S. Virgin Islands Waters

AMZ700-100730-
247 PM AST Tue Sep 9 2025

.SYNOPSIS FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS WATERS...
A surface high pressure across the central Atlantic and a front over
the western Atlantic will promote light to moderate east to
southeast winds through the end of the week. The induced surface
trough will continue to move across the region through the
overnight hours, followed by a tropical wave on Wednesday.
Therefore, showers and thunderstorms will increase across the
regional waters through midweek. These thunderstorms could bring
squally weather and locally higher seas.

$$

AMZ711-100730-
Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N-
247 PM AST Tue Sep 9 2025

.TONIGHT...Southeast winds 10 to 15 knots with gusts up to 20 knots.
Seas 3 to 5 feet. Wave Detail: East 4 feet at 8 seconds. Scattered
showers with isolated thunderstorms.
.WEDNESDAY...Southeast winds 10 to 15 knots with gusts up to
25 knots. Seas 3 to 5 feet. Wave Detail: East 4 feet at 8 seconds.
Scattered showers.
.WEDNESDAY NIGHT...East winds 10 to 15 knots with gusts up to
25 knots. Seas 4 to 5 feet. Wave Detail: East 4 feet at 8 seconds
and south 1 foot at 4 seconds. Scattered showers.
.THURSDAY...East winds 10 to 15 knots with gusts up to 25 knots.
Seas around 4 feet. Wave Detail: East 4 feet at 8 seconds and
northeast 1 foot at 12 seconds. Scattered showers in the morning.
.THURSDAY NIGHT...East winds 10 to 15 knots with gusts up to
25 knots. Seas around 4 feet. Wave Detail: East 4 feet at 8 seconds
and northwest 1 foot at 8 seconds.
.FRIDAY...East winds around 10 knots. Seas 3 to 4 feet. Wave Detail:
East 3 feet at 8 seconds and south 1 foot at 5 seconds.
.FRIDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots.
Seas 3 to 4 feet. Scattered showers.
.SATURDAY...East winds 10 to 15 knots. Seas around 3 feet.
.SATURDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet.
Scattered showers.
.SUNDAY...East winds 10 to 15 knots. Seas 3 to 4 feet. Scattered
showers in the morning.
.SUNDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ712-100730-
Coastal Waters of Northern Puerto Rico out 10 NM-
247 PM AST Tue Sep 9 2025

.TONIGHT...Southeast winds 5 to 10 knots. Seas around 3 feet. Wave
Detail: Northeast 3 feet at 8 seconds. Scattered showers with
isolated thunderstorms early this evening, then isolated showers
late this evening and overnight. Isolated thunderstorms late.
.WEDNESDAY...Southeast winds 5 to 10 knots, becoming east 10 to
15 knots with gusts up to 25 knots in the afternoon. Seas 3 to
4 feet. Wave Detail: Northeast 4 feet at 8 seconds. Scattered
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: Northeast 4 feet at
8 seconds.
.THURSDAY...East winds 10 to 15 knots with gusts up to 25 knots.
Seas 3 to 4 feet. Wave Detail: Northeast 4 feet at 8 seconds.
.THURSDAY NIGHT...East winds 10 to 15 knots with gusts up to
25 knots, diminishing to 5 to 10 knots after midnight. Seas 3 to
4 feet. Wave Detail: Northeast 4 feet at 8 seconds and northwest
1 foot at 9 seconds.
.FRIDAY...East winds 5 to 10 knots, increasing to 10 to 15 knots
with gusts up to 20 knots in the afternoon. Seas around 3 feet. Wave
Detail: Northeast 3 feet at 8 seconds and northwest 1 foot at
9 seconds. Scattered showers in the afternoon.
.FRIDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots,
becoming southeast 5 to 10 knots after midnight. Seas around 3 feet.
.SATURDAY...East winds 5 to 10 knots, increasing to 10 to 15 knots
in the afternoon. Seas around 3 feet. Scattered showers.
.SATURDAY NIGHT...East winds 5 to 10 knots. Seas around 3 feet.
Scattered showers.
.SUNDAY...East winds 10 to 15 knots. Seas around 3 feet. Scattered
showers.
.SUNDAY NIGHT...East winds 10 to 15 knots, diminishing to 5 to
10 knots after midnight. Seas around 3 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ716-100730-
Coastal Waters from Cabo San Juan to the waters between Anegada
Island and Virgin Gorda and North 10 NM-
247 PM AST Tue Sep 9 2025

.TONIGHT...Southeast winds 10 to 15 knots with gusts up to 20 knots.
Seas 2 to 4 feet. Wave Detail: Northeast 3 feet at 8 seconds and
southeast 2 feet at 3 seconds. Isolated showers this evening, then
scattered showers after midnight. Isolated thunderstorms late.
.WEDNESDAY...East winds 10 to 15 knots with gusts up to 20 knots.
Seas 2 to 3 feet. Wave Detail: Northeast 3 feet at 8 seconds and
southeast 2 feet at 4 seconds. Scattered showers.
.WEDNESDAY NIGHT...East winds 10 to 15 knots with gusts up to
25 knots. Seas 3 to 4 feet. Wave Detail: East 3 feet at 4 seconds
and east 3 feet at 8 seconds. Scattered showers.
.THURSDAY...East winds 10 to 15 knots. Seas 2 to 4 feet. Wave
Detail: Northeast 3 feet at 8 seconds and southeast 2 feet at
5 seconds. Scattered showers.
.THURSDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: East 3 feet at 8 seconds and southeast 1 foot at 5 seconds.
.FRIDAY...East winds around 10 knots. Seas 2 to 3 feet. Wave Detail:
East 2 feet at 6 seconds and northeast 1 foot at 12 seconds.
.FRIDAY NIGHT...East winds around 10 knots. Seas 2 to 3 feet.
Scattered showers.
.SATURDAY...East winds around 10 knots. Seas 2 to 3 feet. Scattered
showers in the morning.
.SATURDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.
Scattered showers.
.SUNDAY...East winds 10 to 15 knots. Seas 2 to 3 feet. Scattered
showers in the afternoon.
.SUNDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.
Scattered showers.

Winds and seas higher in and near thunderstorms.

$$

AMZ723-100730-
Anegada Passage east of Virgin Gorda and Saint Croix south to 17N-
247 PM AST Tue Sep 9 2025

.TONIGHT...Southeast winds 10 to 15 knots with gusts up to 20 knots.
Seas 3 to 4 feet. Wave Detail: Northeast 3 feet at 8 seconds and
southeast 2 feet at 5 seconds. Isolated showers this evening.
Scattered showers after midnight. Isolated thunderstorms late.
.WEDNESDAY...East winds 10 to 15 knots with gusts up to 20 knots.
Seas 3 to 4 feet. Wave Detail: Northeast 4 feet at 8 seconds and
southeast 3 feet at 5 seconds. Scattered showers.
.WEDNESDAY NIGHT...East winds 15 to 20 knots with gusts up to
25 knots. Seas around 4 feet. Wave Detail: East 4 feet at 5 seconds
and northeast 3 feet at 8 seconds. Scattered showers.
.THURSDAY...East winds 10 to 15 knots with gusts up to 20 knots.
Seas around 4 feet. Wave Detail: East 4 feet at 7 seconds. Scattered
showers in the morning.
.THURSDAY NIGHT...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 northeast 3 feet at 8 seconds.
.FRIDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas
around 3 feet. Wave Detail: East 3 feet at 6 seconds and northeast
1 foot at 12 seconds.
.FRIDAY NIGHT...East winds 10 to 15 knots. Seas around 3 feet.
.SATURDAY...East winds 10 to 15 knots. Seas around 3 feet.
.SATURDAY NIGHT...East winds 10 to 15 knots. Seas around 3 feet.
.SUNDAY...East winds 10 to 15 knots. Seas 3 to 4 feet.
.SUNDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ726-100730-
Coastal waters east of Puerto Rico, around Vieques, and around and
just north of Culebra and Saint John-
247 PM AST Tue Sep 9 2025

.TONIGHT...Southeast winds 5 to 10 knots, increasing to 10 to
15 knots late this evening and overnight. Seas 2 to 3 feet. Wave
Detail: Southeast 2 feet at 5 seconds and east 2 feet at 8 seconds.
Isolated showers this evening. Isolated thunderstorms. Scattered
showers after midnight.
.WEDNESDAY...East winds 10 to 15 knots with gusts up to 20 knots.
Seas 2 to 4 feet. Wave Detail: East 3 feet at 8 seconds and
southeast 2 feet at 5 seconds. Scattered showers.
.WEDNESDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to
15 knots after midnight. Seas 3 to 4 feet. Wave Detail: Southeast
3 feet at 5 seconds and east 3 feet at 8 seconds. Scattered showers.
.THURSDAY...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 in the morning.
.THURSDAY NIGHT...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.
.FRIDAY...East winds around 10 knots. Seas 2 to 3 feet. Wave Detail:
Southeast 2 feet at 5 seconds and east 2 feet at 8 seconds.
.FRIDAY NIGHT...East winds around 10 knots. Seas 2 to 3 feet.
Scattered showers.
.SATURDAY...East winds around 10 knots. Seas 2 to 3 feet. Scattered
showers in the afternoon.
.SATURDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.
.SUNDAY...East winds 10 to 15 knots. Seas 2 to 3 feet.
.SUNDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ733-100730-
Caribbean waters of Puerto Rico from 10 NM to 17N, including the
coastal waters of Saint Croix-
247 PM AST Tue Sep 9 2025

.TONIGHT...Southeast winds 10 to 15 knots with gusts up to 20 knots.
Seas around 3 feet. Wave Detail: Southeast 3 feet at 5 seconds and
east 2 feet at 8 seconds. Scattered showers with isolated
thunderstorms early this evening, then isolated showers late this
evening and overnight. Isolated thunderstorms late.
.WEDNESDAY...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
east 2 feet at 8 seconds. Scattered showers.
.WEDNESDAY NIGHT...East winds 15 to 20 knots with gusts up to
25 knots. 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 around 4 feet. Wave Detail: East 4 feet at 7 seconds. Scattered
showers in the morning.
.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.
.FRIDAY...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.
.FRIDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots.
Seas around 3 feet.
.SATURDAY...East winds around 10 knots. Seas around 3 feet.
.SATURDAY NIGHT...East winds 10 to 15 knots. Seas around 3 feet.
.SUNDAY...East winds 10 to 15 knots. Seas around 3 feet.
.SUNDAY NIGHT...East winds 10 to 15 knots. Seas around 3 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ735-100730-
Coastal Waters of Southern Puerto Rico out 10 NM-
247 PM AST Tue Sep 9 2025

.TONIGHT...East winds 5 to 10 knots, increasing to 10 to 15 knots
with gusts up to 20 knots after midnight. Seas 2 to 3 feet. Wave
Detail: Southeast 2 feet at 5 seconds. Numerous showers with
isolated thunderstorms early this evening, then isolated showers
late this evening and overnight.
.WEDNESDAY...East winds 10 to 15 knots with gusts up to 20 knots.
Seas 2 to 3 feet. Wave Detail: East 2 feet at 6 seconds.
.WEDNESDAY NIGHT...East winds 10 to 15 knots with gusts up to
20 knots. Seas 2 to 4 feet. Wave Detail: Southeast 3 feet at
5 seconds and east 1 foot at 8 seconds.
.THURSDAY...East winds 10 to 15 knots with gusts up to 25 knots.
Seas 3 to 4 feet. Wave Detail: East 3 feet at 7 seconds.
.THURSDAY NIGHT...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.
.FRIDAY...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.
.FRIDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet.
Scattered showers.
.SATURDAY...East winds 5 to 10 knots, increasing to 10 to 15 knots
in the afternoon. Seas 2 to 3 feet. Scattered showers in the
morning.
.SATURDAY NIGHT...East winds 5 to 10 knots, increasing to 10 to
15 knots after midnight. Seas 2 to 3 feet. Scattered showers.
.SUNDAY...East winds 10 to 15 knots. Seas 2 to 3 feet. Scattered
showers in the morning.
.SUNDAY NIGHT...East winds 10 to 15 knots, diminishing to 5 to
10 knots after midnight. Seas 2 to 3 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ741-100730-
Mona Passage Southward to 17N-
247 PM AST Tue Sep 9 2025

.TONIGHT...East winds 5 to 10 knots, increasing to 10 to 15 knots
with gusts up to 20 knots late this evening and overnight. Seas 2 to
3 feet. Wave Detail: Southeast 3 feet at 5 seconds and northeast
2 feet at 8 seconds. Scattered showers with isolated thunderstorms
this evening, then isolated showers after midnight.
.WEDNESDAY...Southeast 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 northeast 2 feet at 8 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, diminishing to 10 to 15 knots
in the afternoon. Seas 3 to 4 feet. Wave Detail: East 4 feet at
7 seconds. Scattered 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.
.FRIDAY...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.
.FRIDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots.
Seas around 3 feet.
.SATURDAY...East winds 10 to 15 knots. Seas around 3 feet.
.SATURDAY NIGHT...East winds 10 to 15 knots. Seas around 3 feet.
Scattered showers.
.SUNDAY...East winds 10 to 15 knots. Seas around 3 feet. Scattered
showers in the afternoon.
.SUNDAY NIGHT...East winds 10 to 15 knots. Seas around 3 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ742-100730-
Coastal Waters of Northwestern Puerto Rico out 10 NM-
247 PM AST Tue Sep 9 2025

.TONIGHT...East winds around 5 knots, becoming southeast late this
evening and overnight. Seas around 2 feet. Wave Detail: Northeast
2 feet at 7 seconds and south 1 foot at 5 seconds. Scattered showers
early this evening, then isolated showers late this evening and
overnight.
.WEDNESDAY...Southeast winds 5 to 10 knots, becoming east in the
afternoon. Seas around 2 feet. Wave Detail: Southeast 2 feet at
4 seconds and northeast 2 feet at 8 seconds. Scattered showers in
the afternoon.
.WEDNESDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Northeast 2 feet at 8 seconds and south 1 foot at 5 seconds.
.THURSDAY...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail:
Northeast 2 feet at 8 seconds and south 1 foot at 6 seconds.
Scattered showers in the afternoon.
.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
3 feet. Wave Detail: Northeast 2 feet at 7 seconds and south 1 foot
at 6 seconds.
.FRIDAY...East winds around 5 knots, becoming northeast in the
afternoon. Seas 2 to 3 feet. Wave Detail: Southeast 1 foot at
6 seconds and north 1 foot at 9 seconds. Scattered showers in the
afternoon.
.FRIDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet.
.SATURDAY...East winds around 5 knots. Seas around 2 feet. Numerous
showers in the afternoon.
.SATURDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet.
.SUNDAY...East winds around 5 knots. Seas around 2 feet. Numerous
showers in the afternoon.
.SUNDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet.

$$

AMZ745-100730-
Coastal Waters of Southwestern Puerto Rico out 10 NM-
247 PM AST Tue Sep 9 2025

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

$$