559
FZCA52 TJSJ 110823
CWFSJU

Coastal Waters Forecast
National Weather Service San Juan PR
423 AM AST Mon Aug 11 2025

Puerto Rico and the U.S. Virgin Islands Waters

AMZ700-112130-
423 AM AST Mon Aug 11 2025

.SYNOPSIS FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS WATERS...

Gentle to moderate easterly winds are expected over the next few days,
resulting in seas of around 2 to 4 feet, locally higher up to 5 feet.
Tropical moisture will bring periods of shower activity across the
regional waters and afternoon convection is expected to develop each
day across the coastal waters of western Puerto Rico and into the
Mona Passage. A Saharan Air Layer is expected to arrive tomorrow,
leading to reduced visibilities through at least Thursday morning.
Additionally, the Invest 97L, monitored by the National Hurricane
Center, is forecast to move northeast of the region by the upcoming
weekend and it could trigger some marine hazards. Stay informed and
monitor future forecasts.

$$

AMZ711-112130-
Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N-
423 AM AST Mon Aug 11 2025

.TODAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas
4 to 5 feet. Wave Detail: East 4 feet at 7 seconds and north 3 feet
at 10 seconds. Isolated showers.
.TONIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas
4 to 5 feet. Wave Detail: East 4 feet at 5 seconds and north 2 feet
at 10 seconds. Scattered showers after midnight.
.TUESDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas
around 4 feet. Wave Detail: East 3 feet at 7 seconds and northeast
2 feet at 9 seconds. Scattered showers.
.TUESDAY NIGHT...East winds 10 to 15 knots with gusts up to
20 knots. Seas around 4 feet. Wave Detail: East 4 feet at 8 seconds
and northeast 2 feet at 9 seconds. Scattered showers.
.WEDNESDAY...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
northeast 1 foot at 9 seconds. Scattered showers in the morning.
.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 8 seconds
and north 1 foot at 10 seconds. Scattered showers after midnight.
.THURSDAY...East winds around 15 knots. Seas 4 to 5 feet.
.THURSDAY NIGHT...East winds 10 to 15 knots. Seas 4 to 5 feet.
.FRIDAY...East winds 10 to 15 knots. Seas 4 to 5 feet. Scattered
showers in the morning.
.FRIDAY NIGHT...Northeast winds 5 to 10 knots. Seas around 4 feet.
Numerous showers.

$$

AMZ712-112130-
Coastal Waters of Northern Puerto Rico out 10 NM-
423 AM AST Mon Aug 11 2025

.TODAY...East winds 5 to 10 knots, increasing to 10 to 15 knots with
gusts up to 25 knots late this morning and afternoon. Seas around
4 feet. Wave Detail: East 4 feet at 6 seconds and north 2 feet at
10 seconds. Isolated showers.
.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 and north
2 feet at 10 seconds.
.TUESDAY...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 and north 2 feet
at 10 seconds. Scattered showers in the afternoon.
.TUESDAY NIGHT...East winds 10 to 15 knots with gusts up to
20 knots. Seas 3 to 4 feet. Wave Detail: East 3 feet at 5 seconds
and northeast 2 feet at 9 seconds. Scattered showers after midnight.
.WEDNESDAY...East winds 5 to 10 knots, becoming northeast 10 to
15 knots with gusts up to 20 knots in the afternoon. Seas 3 to
4 feet. Wave Detail: Northeast 3 feet at 9 seconds and northeast
2 feet at 9 seconds. Scattered showers in the morning.
.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 and north 1 foot at 9 seconds. Scattered showers after
midnight.
.THURSDAY...East winds 10 to 15 knots. Seas 3 to 4 feet. Scattered
showers.
.THURSDAY NIGHT...East winds 10 to 15 knots. Seas around 4 feet.
.FRIDAY...East winds 10 to 15 knots. Seas around 4 feet. Scattered
showers in the morning.
.FRIDAY NIGHT...Northeast winds 5 to 10 knots. Seas 3 to 4 feet.
Scattered showers.

$$

AMZ716-112130-
Coastal Waters from Cabo San Juan to the waters between Anegada
Island and Virgin Gorda and North 10 NM-
423 AM AST Mon Aug 11 2025

.TODAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas
3 to 4 feet. Wave Detail: East 3 feet at 6 seconds and northeast
3 feet at 10 seconds. Scattered showers this morning. Isolated
showers late.
.TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas
3 to 4 feet. Wave Detail: East 3 feet at 5 seconds and north 3 feet
at 10 seconds.
.TUESDAY...East winds 10 to 15 knots. Seas 3 to 4 feet. Wave Detail:
East 3 feet at 5 seconds and north 2 feet at 9 seconds. Numerous
showers, mainly 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 8 seconds
and east 2 feet at 5 seconds. Scattered showers after midnight.
.WEDNESDAY...East winds 10 to 15 knots with gusts up to 20 knots.
Seas 2 to 3 feet. Wave Detail: East 3 feet at 8 seconds and east
2 feet at 5 seconds. Scattered showers in the morning.
.WEDNESDAY NIGHT...East winds around 15 knots with gusts up to
25 knots. Seas 2 to 3 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 3 to 4 feet. Scattered
showers in the afternoon.
.THURSDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet.
Scattered showers.
.FRIDAY...East winds 10 to 15 knots, becoming northeast 5 to
10 knots in the afternoon. Seas 2 to 4 feet. Scattered showers in
the morning.
.FRIDAY NIGHT...Northeast winds 5 to 10 knots. Seas 2 to 4 feet.
Scattered showers.

$$

AMZ723-112130-
Anegada Passage east of Virgin Gorda and Saint Croix south to 17N-
423 AM AST Mon Aug 11 2025

.TODAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas
around 4 feet. Wave Detail: East 4 feet at 5 seconds and northeast
2 feet at 10 seconds. Isolated showers this morning.
.TONIGHT...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
2 feet at 10 seconds.
.TUESDAY...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
2 feet at 10 seconds. Scattered showers.
.TUESDAY NIGHT...East winds 10 to 15 knots with gusts up to
20 knots. Seas around 4 feet. Wave Detail: East 3 feet at 5 seconds
and east 3 feet at 9 seconds.
.WEDNESDAY...Northeast winds 10 to 15 knots with gusts up to
20 knots. Seas 3 to 4 feet. Wave Detail: East 3 feet at 5 seconds
and east 3 feet at 8 seconds.
.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 5 seconds
and east 3 feet at 8 seconds.
.THURSDAY...East winds around 15 knots. Seas 4 to 5 feet.
.THURSDAY NIGHT...East winds 10 to 15 knots. Seas around 4 feet.
.FRIDAY...East winds 5 to 10 knots. Seas 3 to 4 feet.
.FRIDAY NIGHT...Northeast winds 5 to 10 knots. Seas 3 to 4 feet.
Scattered showers.

$$

AMZ726-112130-
Coastal waters east of Puerto Rico, around Vieques, and around and
just north of Culebra and Saint John-
423 AM AST Mon Aug 11 2025

.TODAY...East winds 10 to 15 knots. Seas around 3 feet. Wave Detail:
East 3 feet at 5 seconds. Scattered showers this morning, then
isolated showers early this afternoon. Scattered showers late.
.TONIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas
3 to 4 feet. Wave Detail: East 3 feet at 5 seconds. Scattered
showers after midnight.
.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. Numerous
showers, mainly 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 7 seconds.
Scattered showers after midnight.
.WEDNESDAY...Northeast winds 10 to 15 knots with gusts up to
20 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 5 seconds
and east 3 feet at 8 seconds. Scattered showers in the morning.
.WEDNESDAY NIGHT...Northeast winds 10 to 15 knots with gusts up to
25 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 5 seconds
and east 3 feet at 8 seconds. Scattered showers.
.THURSDAY...East winds 10 to 15 knots. Seas 3 to 4 feet. Scattered
showers.
.THURSDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet.
Scattered showers.
.FRIDAY...East winds 10 to 15 knots, diminishing to 5 to 10 knots in
the afternoon. Seas 2 to 3 feet. Scattered showers in the morning.
.FRIDAY NIGHT...Northeast winds around 10 knots. Seas 2 to 3 feet.
Scattered showers.

$$

AMZ733-112130-
Caribbean waters of Puerto Rico from 10 NM to 17N, including the
coastal waters of Saint Croix-
423 AM AST Mon Aug 11 2025

.TODAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas
3 to 4 feet. Wave Detail: East 3 feet at 5 seconds and northeast
1 foot at 8 seconds. Scattered showers this morning.
.TONIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas
3 to 4 feet. Wave Detail: East 4 feet at 5 seconds and northeast
1 foot at 8 seconds. Scattered showers after midnight.
.TUESDAY...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.
.TUESDAY NIGHT...East winds 10 to 15 knots with gusts up to
20 knots. Seas 3 to 4 feet. Wave Detail: East 4 feet at 6 seconds.
Scattered showers after midnight.
.WEDNESDAY...East winds 10 to 15 knots with gusts up to 20 knots.
Seas around 3 feet. Wave Detail: East 3 feet at 7 seconds.
.WEDNESDAY NIGHT...Northeast winds around 15 knots with gusts up to
25 knots. Seas around 3 feet. Wave Detail: East 3 feet at 7 seconds.
Scattered showers after midnight.
.THURSDAY...East winds around 15 knots. Seas 3 to 4 feet. Scattered
showers in the morning.
.THURSDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet.
Scattered showers.
.FRIDAY...East winds 10 to 15 knots. Seas around 3 feet. Scattered
showers.
.FRIDAY NIGHT...Northeast winds 5 to 10 knots. Seas around 3 feet.
Scattered showers.

$$

AMZ735-112130-
Coastal Waters of Southern Puerto Rico out 10 NM-
423 AM AST Mon Aug 11 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 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
2 to 3 feet. Wave Detail: East 3 feet at 6 seconds. Scattered
showers in the morning.
.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 6 seconds.
Scattered showers after midnight.
.WEDNESDAY...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 in the morning.
.WEDNESDAY NIGHT...East winds 10 to 15 knots, becoming northeast
5 to 10 knots after midnight. Seas 2 to 3 feet. Wave Detail: East
3 feet at 6 seconds. Scattered showers after midnight.
.THURSDAY...East winds 10 to 15 knots. Seas 2 to 3 feet. Scattered
showers in the afternoon.
.THURSDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.
Scattered showers.
.FRIDAY...East winds 10 to 15 knots. Seas 2 to 3 feet. Scattered
showers in the afternoon.
.FRIDAY NIGHT...Northeast winds 5 to 10 knots. Seas 2 to 3 feet.
Scattered showers.

$$

AMZ741-112130-
Mona Passage Southward to 17N-
423 AM AST Mon Aug 11 2025

.TODAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas
3 to 4 feet. Wave Detail: East 3 feet at 5 seconds and north 2 feet
at 9 seconds. Scattered showers until late afternoon. Isolated
thunderstorms early this afternoon, then isolated showers late.
.TONIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas
3 to 4 feet. Wave Detail: East 4 feet at 5 seconds and north 2 feet
at 10 seconds.
.TUESDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas
3 to 4 feet. Wave Detail: East 4 feet at 6 seconds and north 2 feet
at 10 seconds.
.TUESDAY NIGHT...East winds 10 to 15 knots with gusts up to
20 knots. Seas 3 to 4 feet. Wave Detail: East 3 feet at 6 seconds
and north 2 feet at 10 seconds.
.WEDNESDAY...East winds 10 to 15 knots with gusts up to 20 knots.
Seas 3 to 4 feet. Wave Detail: East 3 feet at 6 seconds and north
1 foot at 9 seconds. Scattered showers in the morning.
.WEDNESDAY NIGHT...Northeast winds 10 to 15 knots with gusts up to
20 knots. Seas around 3 feet. Wave Detail: Southeast 3 feet at
6 seconds and north 1 foot at 9 seconds.
.THURSDAY...East winds 10 to 15 knots. Seas 3 to 4 feet. Scattered
showers in the morning.
.THURSDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet.
Scattered showers.
.FRIDAY...East winds 10 to 15 knots, diminishing to 5 to 10 knots in
the afternoon. Seas around 3 feet. Scattered showers in the morning.
.FRIDAY NIGHT...Northeast winds 5 to 10 knots, increasing to 10 to
15 knots after midnight. Seas around 3 feet. Scattered showers.

Winds and seas higher in and near thunderstorms.

$$

AMZ742-112130-
Coastal Waters of Northwestern Puerto Rico out 10 NM-
423 AM AST Mon Aug 11 2025

.TODAY...Northeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Southeast 2 feet at 5 seconds and north 2 feet at
10 seconds. Isolated showers late this morning. Numerous showers
with isolated thunderstorms this afternoon.
.TONIGHT...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: East 2 feet at 5 seconds and north 2 feet at 10 seconds.
Scattered showers in the evening.
.TUESDAY...Northeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: East 2 feet at 6 seconds and north 2 feet at 10 seconds.
Numerous showers in the afternoon.
.TUESDAY NIGHT...East winds 10 to 15 knots, diminishing to 5 to
10 knots after midnight. Seas 2 to 3 feet. Wave Detail: East 2 feet
at 6 seconds and north 2 feet at 10 seconds.
.WEDNESDAY...Northeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Northeast 2 feet at 6 seconds and north 1 foot at 9 seconds.
Scattered showers in the afternoon.
.WEDNESDAY NIGHT...Northeast winds 10 to 15 knots with gusts up to
20 knots. Seas 2 to 3 feet. Wave Detail: Northeast 3 feet at
9 seconds and east 2 feet at 5 seconds.
.THURSDAY...East winds 5 to 10 knots. Seas 2 to 3 feet. Scattered
showers in the afternoon.
.THURSDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.
.FRIDAY...East winds 10 to 15 knots, becoming northeast 5 to
10 knots in the afternoon. Seas 2 to 3 feet. Scattered showers in
the afternoon.
.FRIDAY NIGHT...Northeast winds 5 to 10 knots. Seas 2 to 3 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ745-112130-
Coastal Waters of Southwestern Puerto Rico out 10 NM-
423 AM AST Mon Aug 11 2025

.TODAY...East winds around 5 knots, increasing to 5 to 10 knots
late. Seas around 2 feet. Wave Detail: Southeast 2 feet at 5 seconds
and north 1 foot at 9 seconds. Isolated showers late this morning.
Scattered showers with isolated thunderstorms this afternoon.
.TONIGHT...East winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Southeast 2 feet at 5 seconds and north 1 foot at 8 seconds.
.TUESDAY...East winds around 5 knots, increasing to 5 to 10 knots in
the afternoon. Seas around 2 feet. Wave Detail: Southeast 2 feet at
5 seconds and north 1 foot at 7 seconds.
.TUESDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Southeast 1 foot at 6 seconds and north 1 foot at 7 seconds.
.WEDNESDAY...East winds around 5 knots. Seas around 2 feet. Wave
Detail: North 1 foot at 6 seconds and southeast 1 foot at 6 seconds.
Scattered showers.
.WEDNESDAY NIGHT...Northeast winds around 5 knots. Seas around
2 feet. Wave Detail: North 1 foot at 6 seconds and southeast 1 foot
at 6 seconds.
.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.
.FRIDAY...East winds around 5 knots. Seas around 2 feet. Scattered
showers in the afternoon.
.FRIDAY NIGHT...Northeast winds 5 to 10 knots. Seas around 2 feet.

Winds and seas higher in and near thunderstorms.

$$