710
FZCA52 TJSJ 091946
CWFSJU

Coastal Waters Forecast
National Weather Service San Juan PR
346 PM AST Sat Aug 9 2025

Puerto Rico and the U.S. Virgin Islands Waters

AMZ700-100830-
346 PM AST Sat Aug 9 2025

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

Moderate to locally fresh easterly winds are mainly expected over
the next few days, resulting in seas of around 2 to 4 feet. A surface
trough will continue to enhance rainfall activity and maintain the
potential for thunderstorms through tonight. Afternoon convection is
expected to develop each day across the coastal waters of western
Puerto Rico and into the Mona Passage. Invest 96L is forecast to move
well northeast of the northern U.S. Virgin Islands by early next
week. However, trailing tropical moisture will continue to bring
periods of shower activity across the regional waters. Additionally
Invest 97L(the newly system monitored by the National Hurricane
Center) is forecast to also move well northeast of the region but it
could trigger some marine hazards by the upcoming weekend.
Additionally, a Saharan Air Layer (SAL) is expected to arrive in the
region by Tuesday afternoon, leading to reduced visibilities.

$$

AMZ711-100830-
Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N-
346 PM AST Sat Aug 9 2025

.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. Isolated showers
this evening, then scattered showers after midnight.
.SUNDAY...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. Scattered
showers in the morning.
.SUNDAY NIGHT...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
northeast 4 feet at 10 seconds.
.MONDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas
around 4 feet. Wave Detail: Northeast 4 feet at 10 seconds and east
3 feet at 5 seconds.
.MONDAY NIGHT...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
northeast 3 feet at 9 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 6 seconds and northeast
3 feet at 9 seconds. Scattered showers.
.TUESDAY NIGHT...East winds 10 to 15 knots with gusts up to
20 knots. Seas around 4 feet. Scattered showers.
.WEDNESDAY...East winds around 10 knots. Seas 3 to 4 feet. Scattered
showers in the morning.
.WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet.
Scattered showers.
.THURSDAY...East winds 10 to 15 knots. Seas 3 to 5 feet.
.THURSDAY NIGHT...East winds 10 to 15 knots. Seas 4 to 5 feet.

$$

AMZ712-100830-
Coastal Waters of Northern Puerto Rico out 10 NM-
346 PM AST Sat Aug 9 2025

.TONIGHT...East winds 5 to 10 knots. Seas around 3 feet. Wave
Detail: Northeast 3 feet at 8 seconds. Scattered showers.
.SUNDAY...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: Northeast 3 feet at 9 seconds. Scattered showers in the
afternoon.
.SUNDAY 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: East 3 feet at 5 seconds and northeast 3 feet at 9 seconds.
.MONDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas
around 4 feet. Wave Detail: Northeast 3 feet at 5 seconds and north
3 feet at 10 seconds. Scattered showers in the afternoon.
.MONDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots.
Seas around 4 feet. Wave Detail: East 4 feet at 5 seconds and north
3 feet at 10 seconds. Scattered showers in the evening.
.TUESDAY...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 and northeast
2 feet at 9 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 3 to
4 feet.
.WEDNESDAY...East winds 5 to 10 knots, becoming northeast 10 to
15 knots in the afternoon. Seas 3 to 4 feet.
.WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet.
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.

$$

AMZ716-100830-
Coastal Waters from Cabo San Juan to the waters between Anegada
Island and Virgin Gorda and North 10 NM-
346 PM AST Sat Aug 9 2025

.TONIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail:
East 3 feet at 8 seconds and east 2 feet at 4 seconds. Scattered
showers this evening, then numerous showers after midnight.
.SUNDAY...East winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail:
Northeast 3 feet at 9 seconds and southeast 2 feet at 4 seconds.
Scattered showers in the morning.
.SUNDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots.
Seas 3 to 4 feet. Wave Detail: East 3 feet at 4 seconds and
northeast 3 feet at 9 seconds. Scattered showers after midnight.
.MONDAY...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 10 seconds. Scattered showers in the morning.
.MONDAY 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 10 seconds. Scattered showers.
.TUESDAY...East winds 10 to 15 knots. Seas 3 to 4 feet. Wave Detail:
East 3 feet at 5 seconds and northeast 2 feet at 9 seconds. Numerous
showers, mainly in the morning.
.TUESDAY NIGHT...East winds around 10 knots. Seas 2 to 3 feet.
.WEDNESDAY...East winds around 10 knots. Seas 2 to 3 feet.
.WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.
Scattered showers.
.THURSDAY...East winds 10 to 15 knots. Seas 2 to 3 feet. Scattered
showers.
.THURSDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet.

$$

AMZ723-100830-
Anegada Passage east of Virgin Gorda and Saint Croix south to 17N-
346 PM AST Sat Aug 9 2025

.TONIGHT...East winds 10 to 15 knots. Seas around 3 feet. Wave
Detail: Southeast 3 feet at 5 seconds and northeast 2 feet at
8 seconds. Scattered showers this evening, then numerous showers
after midnight.
.SUNDAY...East winds 10 to 15 knots. Seas around 3 feet. Wave
Detail: Southeast 3 feet at 5 seconds and northeast 2 feet at
9 seconds. Scattered showers.
.SUNDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots.
Seas 3 to 4 feet. Wave Detail: East 3 feet at 4 seconds and
northeast 2 feet at 10 seconds. Scattered showers after midnight.
.MONDAY...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 northeast
2 feet at 10 seconds.
.MONDAY NIGHT...East winds around 15 knots with gusts up to
20 knots. Seas around 4 feet. Wave Detail: East 3 feet at 5 seconds
and northeast 2 feet at 10 seconds. Scattered showers in the
evening.
.TUESDAY...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 northeast
3 feet at 9 seconds. Scattered showers in the morning.
.TUESDAY NIGHT...East winds 10 to 15 knots with gusts up to
20 knots. Seas around 4 feet.
.WEDNESDAY...East winds 10 to 15 knots. Seas 3 to 4 feet.
.WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet.
.THURSDAY...East winds 10 to 15 knots. Seas around 4 feet.
.THURSDAY NIGHT...East winds 10 to 15 knots. Seas around 4 feet.

$$

AMZ726-100830-
Coastal waters east of Puerto Rico, around Vieques, and around and
just north of Culebra and Saint John-
346 PM AST Sat Aug 9 2025

.TONIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail:
Southeast 2 feet at 5 seconds and east 2 feet at 8 seconds.
Scattered showers this evening, then numerous showers after
midnight.
.SUNDAY...East winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail:
Southeast 2 feet at 5 seconds and east 2 feet at 8 seconds.
Scattered showers.
.SUNDAY NIGHT...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 and
northeast 2 feet at 8 seconds. Scattered showers after midnight.
.MONDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas
around 3 feet. Wave Detail: East 3 feet at 5 seconds and northeast
1 foot at 8 seconds. Scattered showers in the morning.
.MONDAY 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 1 foot at 8 seconds. Scattered showers after midnight.
.TUESDAY...East winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail:
East 3 feet at 5 seconds and northeast 1 foot at 9 seconds. Numerous
showers, mainly in the morning.
.TUESDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.
.WEDNESDAY...East winds around 10 knots. Seas 2 to 3 feet.
.WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.
Scattered showers.
.THURSDAY...East winds 10 to 15 knots. Seas 2 to 4 feet. Scattered
showers.
.THURSDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet.

$$

AMZ733-100830-
Caribbean waters of Puerto Rico from 10 NM to 17N, including the
coastal waters of Saint Croix-
346 PM AST Sat Aug 9 2025

.TONIGHT...East winds 10 to 15 knots. Seas around 3 feet. Wave
Detail: Southeast 2 feet at 5 seconds and east 2 feet at 8 seconds.
Scattered showers this evening, then numerous showers after
midnight.
.SUNDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas
around 3 feet. Wave Detail: East 2 feet at 7 seconds. Scattered
showers in the morning.
.SUNDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots.
Seas around 3 feet. Wave Detail: East 3 feet at 5 seconds and east
2 feet at 8 seconds. Scattered showers after midnight.
.MONDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas
around 3 feet. Wave Detail: East 3 feet at 5 seconds and northeast
1 foot at 8 seconds. Scattered showers in the morning.
.MONDAY NIGHT...East winds around 15 knots with gusts up to
25 knots. Seas 3 to 4 feet. Wave Detail: East 3 feet at 5 seconds
and northeast 1 foot at 8 seconds. Scattered showers.
.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 and northeast
1 foot at 9 seconds. Scattered showers in the morning.
.TUESDAY NIGHT...East winds 10 to 15 knots with gusts up to
20 knots. Seas around 3 feet.
.WEDNESDAY...East winds 10 to 15 knots. Seas around 3 feet.
.WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas around 3 feet.
Scattered showers.
.THURSDAY...East winds 10 to 15 knots. Seas around 3 feet. Scattered
showers in the morning.
.THURSDAY NIGHT...East winds around 15 knots. Seas 3 to 4 feet.

$$

AMZ735-100830-
Coastal Waters of Southern Puerto Rico out 10 NM-
346 PM AST Sat Aug 9 2025

.TONIGHT...East winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Southeast 2 feet at 6 seconds. Scattered showers.
.SUNDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas
2 to 3 feet. Wave Detail: Southeast 2 feet at 6 seconds.
.SUNDAY 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.
.MONDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas
2 to 3 feet. Wave Detail: East 3 feet at 5 seconds. Scattered
showers.
.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
2 to 3 feet. Wave Detail: East 3 feet at 5 seconds. Scattered
showers in the morning.
.TUESDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet.
.WEDNESDAY...East winds 5 to 10 knots. Seas 2 to 3 feet.
.WEDNESDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet.
.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, diminishing to 5 to
10 knots after midnight. Seas 2 to 3 feet.

$$

AMZ741-100830-
Mona Passage Southward to 17N-
346 PM AST Sat Aug 9 2025

.TONIGHT...East winds 5 to 10 knots. Seas around 3 feet. Wave
Detail: East 3 feet at 6 seconds and northeast 2 feet at 9 seconds.
Isolated showers early this evening, then scattered showers late
this evening and early morning. Numerous showers late.
.SUNDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas
around 3 feet. Wave Detail: Southeast 3 feet at 6 seconds and
northeast 2 feet at 9 seconds. Scattered showers in the morning.
.SUNDAY 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 and
northeast 2 feet at 9 seconds. Scattered showers in the evening.
.MONDAY...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 northeast
2 feet at 9 seconds. Scattered showers.
.MONDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots.
Seas 3 to 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 20 knots. Seas
3 to 4 feet. Wave Detail: East 3 feet at 6 seconds and north 2 feet
at 10 seconds.
.TUESDAY NIGHT...East winds 5 to 10 knots, increasing to 10 to
15 knots with gusts up to 20 knots after midnight. Seas around
3 feet.
.WEDNESDAY...East winds 10 to 15 knots. Seas around 3 feet.
Scattered showers in the afternoon.
.WEDNESDAY NIGHT...East winds 5 to 10 knots. Seas around 3 feet.
Scattered showers.
.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.

$$

AMZ742-100830-
Coastal Waters of Northwestern Puerto Rico out 10 NM-
346 PM AST Sat Aug 9 2025

.TONIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail:
Northeast 2 feet at 9 seconds and southeast 1 foot at 6 seconds.
Scattered showers this evening.
.SUNDAY...Northeast winds around 5 knots. Seas 2 to 3 feet. Wave
Detail: Northeast 2 feet at 9 seconds and south 1 foot at 5 seconds.
Scattered showers in the afternoon.
.SUNDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: North 2 feet at 9 seconds and south 1 foot at 4 seconds.
.MONDAY...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail:
East 2 feet at 5 seconds and north 2 feet at 10 seconds. Numerous
showers in the afternoon.
.MONDAY 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: East 2 feet at 6 seconds and north 2 feet at 10 seconds.
Scattered showers in the evening.
.TUESDAY...East winds around 5 knots, becoming northeast in the
afternoon. 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 5 to 10 knots. Seas 2 to 3 feet.
.WEDNESDAY...Northeast winds 5 to 10 knots. Seas 2 to 3 feet.
Scattered showers in the afternoon.
.WEDNESDAY NIGHT...Northeast winds 5 to 10 knots. Seas 2 to 3 feet.
.THURSDAY...East winds 5 to 10 knots. Seas 2 to 3 feet. Numerous
showers in the afternoon.
.THURSDAY NIGHT...East winds 10 to 15 knots, diminishing to 5 to
10 knots after midnight. Seas 2 to 3 feet.

$$

AMZ745-100830-
Coastal Waters of Southwestern Puerto Rico out 10 NM-
346 PM AST Sat Aug 9 2025

.TONIGHT...East winds 5 to 10 knots, becoming around 10 knots after
midnight. Seas around 2 feet. Wave Detail: Southeast 2 feet at
5 seconds and north 1 foot at 7 seconds. Scattered showers early
this evening.
.SUNDAY...East winds 5 to 10 knots. Seas around 2 feet. Wave Detail:
Southeast 2 feet at 5 seconds and north 1 foot at 7 seconds.
Scattered showers in the afternoon.
.SUNDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots.
Seas around 2 feet. Wave Detail: Southeast 2 feet at 5 seconds and
northwest 1 foot at 9 seconds.
.MONDAY...East winds around 5 knots, becoming southeast in the
afternoon. Seas around 2 feet. Wave Detail: Southeast 2 feet at
5 seconds and north 1 foot at 9 seconds. Scattered showers in the
afternoon.
.MONDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Southeast 2 feet at 6 seconds and northwest 1 foot at
8 seconds. Scattered showers in the evening.
.TUESDAY...East winds 5 to 10 knots. 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.
.WEDNESDAY...East winds 5 to 10 knots. Seas around 2 feet. Scattered
showers in the afternoon.
.WEDNESDAY NIGHT...East winds 5 to 10 knots. Seas around 2 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.

$$