966
FZCA52 TJSJ 170748
CWFSJU

Coastal Waters Forecast
National Weather Service San Juan PR
348 AM AST Thu Jul 17 2025

Puerto Rico and the U.S. Virgin Islands Waters

AMZ700-172030-
348 AM AST Thu Jul 17 2025

.SYNOPSIS FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS WATERS...
A surface high pressure system over the Atlantic will promote
moderate to locally fresh easterly winds through tonight across the
regional waters and local Caribbean passagesexpect choppy seas as
well. Remnant moisture from a tropical wave will result in showers
and isolated thunderstorms today. Additionally, a Saharan Air Layer
will gradually arrive today, bringing hazy skies through Friday
night. Another disturbance is anticipated by the weekend, potentially
increasing shower activity across the waters. Winds will remain
moderate through the weekend, increasing again from Monday night
onward.

$$

AMZ711-172030-
Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N-
348 AM AST Thu Jul 17 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.TODAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas
5 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at
8 seconds. Scattered showers, mainly this morning.
.TONIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas
5 to 6 feet, occasionally to 8 feet. Wave Detail: East 5 feet at
8 seconds and northeast 1 foot at 10 seconds. Scattered showers.
.FRIDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas
4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at
7 seconds and northeast 1 foot at 9 seconds. Scattered showers in
the morning.
.FRIDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots.
Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 4 feet
at 7 seconds and northeast 1 foot at 9 seconds. Scattered showers in
the evening, then numerous showers after midnight.
.SATURDAY...East winds 10 to 15 knots with gusts up to 25 knots.
Seas around 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet
at 7 seconds and northeast 1 foot at 11 seconds. Scattered showers
in the afternoon.
.SATURDAY NIGHT...East winds 10 to 15 knots with gusts up to
25 knots. Seas around 4 feet, occasionally to 5 feet. Wave Detail:
East 4 feet at 7 seconds and northeast 2 feet at 10 seconds.
.SUNDAY...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally
to 5 feet. Scattered showers in the morning.
.SUNDAY NIGHT...East winds 10 to 15 knots. Seas around 4 feet,
occasionally to 5 feet.
.MONDAY...East winds around 15 knots. Seas around 4 feet,
occasionally to 5 feet.
.MONDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 5 feet,
occasionally to 6 feet.

$$

AMZ712-172030-
Coastal Waters of Northern Puerto Rico out 10 NM-
348 AM AST Thu Jul 17 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.TODAY...East winds 10 to 15 knots with gusts up to 25 knots,
increasing to 15 to 20 knots with gusts up to 30 knots this
afternoon. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail:
Northeast 5 feet at 7 seconds. Scattered showers, mainly this
morning.
.TONIGHT...East winds 15 to 20 knots, diminishing to 10 to 15 knots
after midnight. Seas 4 to 6 feet, occasionally to 8 feet. Wave
Detail: Northeast 5 feet at 7 seconds and northeast 1 foot at
9 seconds. Scattered showers.
.FRIDAY...East winds 10 to 15 knots, increasing to 15 to 20 knots in
the afternoon. Seas 4 to 5 feet, occasionally to 6 feet. Wave
Detail: Northeast 4 feet at 7 seconds and northeast 1 foot at
10 seconds. Scattered showers.
.FRIDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots.
Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast
4 feet at 8 seconds. Scattered showers in the evening, then numerous
showers after midnight.
.SATURDAY...East winds 10 to 15 knots with gusts up to 25 knots.
Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast
3 feet at 7 seconds and northeast 1 foot at 10 seconds. Scattered
showers.
.SATURDAY NIGHT...East winds 10 to 15 knots, diminishing to 5 to
10 knots after midnight. Seas 3 to 4 feet, occasionally to 5 feet.
Wave Detail: Northeast 3 feet at 7 seconds and northeast 1 foot at
11 seconds. Numerous showers, mainly in the evening.
.SUNDAY...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally
to 5 feet. Scattered showers.
.SUNDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet.
.MONDAY...East winds 10 to 15 knots, increasing to 15 to 20 knots in
the afternoon. Seas 3 to 4 feet, occasionally to 5 feet. Scattered
showers in the afternoon.
.MONDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet.

$$

AMZ716-172030-
Coastal Waters from Cabo San Juan to the waters between Anegada
Island and Virgin Gorda and North 10 NM-
348 AM AST Thu Jul 17 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.TODAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas
3 to 5 feet, occasionally to 6 feet. Wave Detail: East 4 feet at
6 seconds. Scattered showers, mainly this morning.
.TONIGHT...East winds around 15 knots with gusts up to 25 knots.
Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast
4 feet at 7 seconds and southeast 2 feet at 4 seconds. Scattered
showers.
.FRIDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas
3 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast 4 feet
at 7 seconds and southeast 2 feet at 4 seconds. Scattered showers in
the morning.
.FRIDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots.
Seas around 3 feet, occasionally to 4 feet. Wave Detail: Northeast
3 feet at 7 seconds and southeast 1 foot at 4 seconds. Scattered
showers.
.SATURDAY...East winds 10 to 15 knots. Seas 2 to 3 feet,
occasionally to 4 feet. Wave Detail: Northeast 3 feet at 7 seconds
and southeast 1 foot at 4 seconds. Scattered showers.
.SATURDAY NIGHT...East winds 10 to 15 knots with gusts up to
20 knots. Seas 2 to 3 feet, occasionally to 4 feet. Wave Detail:
East 3 feet at 5 seconds and northeast 1 foot at 11 seconds.
Scattered showers.
.SUNDAY...East winds around 15 knots. Seas 2 to 3 feet, occasionally
to 4 feet. Scattered showers in the morning.
.SUNDAY NIGHT...East winds around 15 knots. Seas 2 to 3 feet,
occasionally to 4 feet.
.MONDAY...East winds around 15 knots. Seas 3 to 4 feet, occasionally
to 5 feet. Scattered showers in the morning.
.MONDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 4 feet,
occasionally to 5 feet.

$$

AMZ723-172030-
Anegada Passage east of Virgin Gorda and Saint Croix south to 17N-
348 AM AST Thu Jul 17 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.TODAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas
around 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at
7 seconds. Scattered showers early this morning, then isolated
showers late this morning and afternoon.
.TONIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas
4 to 5 feet, occasionally to 6 feet. Wave Detail: East 4 feet at
6 seconds and northeast 1 foot at 10 seconds. Scattered showers
after midnight.
.FRIDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas
around 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at
6 seconds and northeast 1 foot at 10 seconds. Scattered showers in
the morning.
.FRIDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots.
Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet
at 6 seconds and northeast 1 foot at 9 seconds. Scattered showers.
.SATURDAY...East winds 10 to 15 knots with gusts up to 20 knots.
Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet
at 6 seconds and northeast 1 foot at 11 seconds. Scattered showers
in the afternoon.
.SATURDAY NIGHT...East winds 10 to 15 knots with gusts up to
25 knots. Seas around 3 feet, occasionally to 4 feet. Wave Detail:
East 3 feet at 4 seconds and northeast 2 feet at 7 seconds.
Scattered showers.
.SUNDAY...East winds around 15 knots. Seas around 4 feet,
occasionally to 5 feet. Scattered showers in the morning.
.SUNDAY NIGHT...East winds 15 to 20 knots. Seas around 4 feet,
occasionally to 5 feet.
.MONDAY...East winds 15 to 20 knots. Seas around 4 feet,
occasionally to 5 feet.
.MONDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 5 feet,
occasionally to 6 feet.

$$

AMZ726-172030-
Coastal waters east of Puerto Rico, around Vieques, and around and
just north of Culebra and Saint John-
348 AM AST Thu Jul 17 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.TODAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas
3 to 5 feet, occasionally to 6 feet. Wave Detail: East 4 feet at
6 seconds. Isolated showers this morning, then scattered showers
with isolated thunderstorms early this afternoon. Isolated showers
late.
.TONIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas
3 to 4 feet, occasionally to 5 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, occasionally to 5 feet. Wave Detail: East 3 feet at
7 seconds. Scattered showers in the afternoon.
.FRIDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots.
Seas around 3 feet, occasionally to 4 feet. Wave Detail: East 3 feet
at 6 seconds. Numerous showers after midnight.
.SATURDAY...East winds 10 to 15 knots with gusts up to 20 knots.
Seas 2 to 3 feet, occasionally to 4 feet. Wave Detail: East 3 feet
at 6 seconds. Scattered showers in the morning.
.SATURDAY NIGHT...East winds 10 to 15 knots with gusts up to
20 knots. Seas 2 to 3 feet, occasionally to 4 feet. Wave Detail:
East 2 feet at 6 seconds. Scattered showers after midnight.
.SUNDAY...East winds 10 to 15 knots. Seas 2 to 3 feet, occasionally
to 4 feet. Scattered showers.
.SUNDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet,
occasionally to 4 feet.
.MONDAY...East winds around 15 knots. Seas 3 to 4 feet, occasionally
to 5 feet. Scattered showers in the morning.
.MONDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Scattered showers.

Winds and seas higher in and near thunderstorms.

$$

AMZ733-172030-
Caribbean waters of Puerto Rico from 10 NM to 17N, including the
coastal waters of Saint Croix-
348 AM AST Thu Jul 17 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.TODAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas
4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at
7 seconds. Scattered showers, mainly this morning.
.TONIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas
4 to 5 feet, occasionally to 6 feet. Wave Detail: East 4 feet at
7 seconds. Scattered showers after midnight.
.FRIDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas
4 to 5 feet, occasionally to 6 feet. Wave Detail: East 4 feet at
7 seconds.
.FRIDAY NIGHT...East winds around 15 knots with gusts up to
25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail:
East 3 feet at 7 seconds. Scattered showers.
.SATURDAY...East winds 10 to 15 knots with gusts up to 20 knots.
Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet
at 6 seconds. Scattered showers.
.SATURDAY NIGHT...East winds around 15 knots with gusts up to
20 knots. Seas around 3 feet, occasionally to 4 feet. Wave Detail:
East 3 feet at 6 seconds. Scattered showers.
.SUNDAY...East winds 10 to 15 knots. Seas around 3 feet,
occasionally to 4 feet.
.SUNDAY NIGHT...East winds around 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet.
.MONDAY...East winds 15 to 20 knots. Seas 3 to 4 feet, occasionally
to 5 feet.
.MONDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 5 feet,
occasionally to 6 feet.

$$

AMZ735-172030-
Coastal Waters of Southern Puerto Rico out 10 NM-
348 AM AST Thu Jul 17 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.TODAY...East winds 10 to 15 knots, increasing to 15 to 20 knots
this afternoon. Seas 3 to 4 feet, occasionally to 5 feet. Wave
Detail: Southeast 4 feet at 6 seconds. Scattered showers early this
morning, then isolated showers late this morning. Scattered showers
with isolated thunderstorms this afternoon.
.TONIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas
3 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 4 feet
at 6 seconds.
.FRIDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas
3 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 3 feet
at 6 seconds.
.FRIDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots.
Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast
3 feet at 6 seconds. Scattered showers in the evening.
.SATURDAY...East winds 10 to 15 knots with gusts up to 20 knots.
Seas 2 to 3 feet, occasionally to 4 feet. Wave Detail: Southeast
3 feet at 6 seconds.
.SATURDAY NIGHT...East winds 10 to 15 knots with gusts up to
20 knots. Seas 2 to 3 feet, occasionally to 4 feet. Wave Detail:
Southeast 3 feet at 5 seconds. Scattered showers in the evening.
.SUNDAY...East winds 10 to 15 knots. Seas 2 to 3 feet, occasionally
to 4 feet.
.SUNDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 4 feet,
occasionally to 5 feet.
.MONDAY...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally
to 5 feet.
.MONDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ741-172030-
Mona Passage Southward to 17N-
348 AM AST Thu Jul 17 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.TODAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas
4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at
7 seconds. Scattered showers early this morning. Isolated showers
late this morning and early afternoon, then scattered showers with
isolated thunderstorms late.
.TONIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas
4 to 5 feet, occasionally to 6 feet. Wave Detail: East 4 feet at
7 seconds. Scattered showers after midnight.
.FRIDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas
4 to 5 feet, occasionally to 6 feet. Wave Detail: East 4 feet at
7 seconds. Numerous showers in the afternoon.
.FRIDAY NIGHT...East winds 15 to 20 knots with gusts up to 25 knots.
Seas around 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet
at 7 seconds and northeast 1 foot at 9 seconds. Numerous showers,
mainly in the evening.
.SATURDAY...East winds 10 to 15 knots with gusts up to 20 knots.
Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet
at 7 seconds and northeast 1 foot at 9 seconds. Scattered showers.
.SATURDAY NIGHT...East winds 10 to 15 knots with gusts up to
20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail:
East 3 feet at 7 seconds and northeast 1 foot at 9 seconds.
Scattered showers.
.SUNDAY...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally
to 5 feet.
.SUNDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Scattered showers.
.MONDAY...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally
to 5 feet.
.MONDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 5 feet,
occasionally to 6 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ742-172030-
Coastal Waters of Northwestern Puerto Rico out 10 NM-
348 AM AST Thu Jul 17 2025

.TODAY...East winds 5 to 10 knots with gusts up to 20 knots. Seas
2 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast 3 feet
at 7 seconds and south 1 foot at 7 seconds. Isolated showers late
this morning. Numerous showers with isolated thunderstorms this
afternoon.
.TONIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas
2 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast 3 feet
at 7 seconds and south 1 foot at 6 seconds. Scattered showers in the
evening.
.FRIDAY...East winds 5 to 10 knots, becoming northeast 10 to
15 knots with gusts up to 20 knots in the afternoon. Seas 2 to
4 feet, occasionally to 5 feet. Wave Detail: Northeast 3 feet at
7 seconds and south 1 foot at 6 seconds. Numerous showers in the
afternoon.
.FRIDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots.
Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast
3 feet at 8 seconds and south 1 foot at 6 seconds. Scattered showers
in the evening.
.SATURDAY...East winds 5 to 10 knots. Seas 2 to 3 feet, occasionally
to 4 feet. Wave Detail: Northeast 2 feet at 6 seconds and south
1 foot at 6 seconds. Showers and scattered thunderstorms in the
afternoon.
.SATURDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet,
occasionally to 4 feet. Wave Detail: Northeast 2 feet at 6 seconds
and south 1 foot at 6 seconds. Numerous showers in the evening.
.SUNDAY...East winds around 5 knots. Seas 2 to 3 feet, occasionally
to 4 feet. Scattered showers in the afternoon.
.SUNDAY NIGHT...East winds around 5 knots, increasing to 5 to
10 knots after midnight. Seas 2 to 3 feet, occasionally to 4 feet.
.MONDAY...East winds 5 to 10 knots. Seas 2 to 3 feet, occasionally
to 4 feet. Scattered showers in the afternoon.
.MONDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet,
occasionally to 4 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ745-172030-
Coastal Waters of Southwestern Puerto Rico out 10 NM-
348 AM AST Thu Jul 17 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, occasionally
to 4 feet. Wave Detail: Southeast 2 feet at 6 seconds. Scattered
showers with isolated thunderstorms early this afternoon. Isolated
showers and thunderstorms late.
.TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas
2 to 3 feet, occasionally to 4 feet. Wave Detail: Southeast 2 feet
at 5 seconds.
.FRIDAY...East winds 5 to 10 knots. Seas around 2 feet. Wave Detail:
Southeast 2 feet at 6 seconds. Numerous showers in the afternoon.
.FRIDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Southeast 2 feet at 6 seconds. Scattered showers in the
evening.
.SATURDAY...East winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Southeast 2 feet at 6 seconds. Scattered showers in the
afternoon.
.SATURDAY NIGHT...East winds 10 to 15 knots with gusts up to
20 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at
6 seconds. Scattered showers in the evening.
.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 2 to 3 feet, occasionally to 4 feet.
.MONDAY...East winds 10 to 15 knots. Seas 2 to 3 feet, occasionally
to 4 feet. Scattered showers in the afternoon.
.MONDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet,
occasionally to 4 feet.

Winds and seas higher in and near thunderstorms.

$$