940
FZCA52 TJSJ 170737
CWFSJU

Coastal Waters Forecast
National Weather Service San Juan PR
337 AM AST Fri Oct 17 2025

Puerto Rico and the U.S. Virgin Islands Waters

AMZ700-172030-
337 AM AST Fri Oct 17 2025

.SYNOPSIS FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS WATERS...
The nearby stationary boundary will continue to promote shower and
thunderstorm activity across the regional waters and passages through
the weekend. This will also increase wind speed from time to time
with the heaviest thunderstorm activity. Pulses of a long period
easterly swell will continue to reach the local exposed waters
through tonight. Another but stronger long period northerly swell,
associated to low pressure system over the northwestern Atlantic
waters, is expected to reach the Atlantic waters and local passages
around Sunday into the upcoming workweek. As a result, hazardous
marine conditions are anticipated. Please, continue to monitor the
forecast updates over the coming days.

$$

AMZ711-172030-
Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N-
337 AM AST Fri Oct 17 2025

.TODAY...Southwest winds 5 to 10 knots with gusts up to 20 knots,
increasing to 10 to 15 knots with gusts up to 20 knots this
afternoon. Seas 4 to 5 feet. Wave Detail: Southwest 3 feet at
4 seconds and north 3 feet at 8 seconds. Scattered showers with
isolated thunderstorms.
.TONIGHT...Southwest winds 5 to 10 knots. Seas 4 to 5 feet. Wave
Detail: North 4 feet at 10 seconds and northeast 3 feet at
12 seconds. Scattered showers.
.SATURDAY...South winds around 5 knots. Seas 4 to 5 feet. Wave
Detail: North 4 feet at 10 seconds and east 2 feet at 7 seconds.
Scattered showers.
.SATURDAY NIGHT...East winds 5 to 10 knots. Seas 4 to 6 feet. Wave
Detail: North 5 feet at 11 seconds and southeast 2 feet at
8 seconds. Numerous showers.
.SUNDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas
6 to 8 feet. Wave Detail: North 7 feet at 14 seconds and southeast
3 feet at 6 seconds.
.SUNDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots.
Seas 7 to 9 feet. Wave Detail: North 7 feet at 14 seconds and east
4 feet at 5 seconds. Scattered showers.
.MONDAY...East winds around 15 knots. Seas 7 to 8 feet. Scattered
showers in the morning.
.MONDAY NIGHT...East winds around 15 knots. Seas 7 to 8 feet.
.TUESDAY...East winds 15 to 20 knots. Seas 6 to 7 feet.
.TUESDAY NIGHT...East winds 15 to 20 knots. Seas 6 to 7 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ712-172030-
Coastal Waters of Northern Puerto Rico out 10 NM-
337 AM AST Fri Oct 17 2025

.TODAY...Southwest winds 5 to 10 knots, becoming west with gusts up
to 20 knots this afternoon. Seas 3 to 4 feet. Wave Detail: North
3 feet at 8 seconds and west 2 feet at 4 seconds. Scattered showers
this morning. Isolated thunderstorms. Showers this afternoon.
.TONIGHT...South winds 5 to 10 knots. Seas 4 to 5 feet. Wave Detail:
North 4 feet at 10 seconds and northeast 2 feet at 14 seconds.
Scattered showers in the evening.
.SATURDAY...Southeast winds around 5 knots, becoming east in the
afternoon. Seas 4 to 5 feet. Wave Detail: North 4 feet at 10 seconds
and northeast 2 feet at 13 seconds. Scattered showers in the
morning, then numerous showers in the afternoon.
.SATURDAY NIGHT...East winds 5 to 10 knots. Seas 4 to 5 feet. Wave
Detail: North 4 feet at 9 seconds and north 3 feet at 12 seconds.
Scattered showers.
.SUNDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas
5 to 7 feet. Wave Detail: North 7 feet at 12 seconds.
.SUNDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots.
Seas 7 to 9 feet. Wave Detail: North 8 feet at 14 seconds and east
3 feet at 5 seconds. Scattered showers.
.MONDAY...East winds 10 to 15 knots, increasing to 15 to 20 knots in
the afternoon. Seas 7 to 8 feet. Scattered showers in the afternoon.
.MONDAY NIGHT...East winds 10 to 15 knots. Seas 7 to 8 feet.
.TUESDAY...East winds 15 to 20 knots. Seas 6 to 7 feet.
.TUESDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to
15 knots after midnight. Seas 5 to 6 feet.

Winds and seas higher in and near thunderstorms.

$$

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

.TODAY...Southwest winds 10 to 15 knots with gusts up to 20 knots.
Seas 3 to 4 feet. Wave Detail: Southwest 3 feet at 4 seconds and
northwest 2 feet at 8 seconds. Numerous showers with isolated
thunderstorms until late afternoon, then scattered showers late.
.TONIGHT...Southwest winds 10 to 15 knots with gusts up to 20 knots,
becoming south 5 to 10 knots after midnight. Seas 3 to 4 feet. Wave
Detail: Northwest 4 feet at 10 seconds and southwest 3 feet at
4 seconds. Scattered showers.
.SATURDAY...South winds 5 to 10 knots. Seas 3 to 5 feet. Wave
Detail: Northwest 4 feet at 10 seconds and northeast 2 feet at
14 seconds. Scattered showers.
.SATURDAY NIGHT...East winds 5 to 10 knots. Seas 3 to 4 feet. Wave
Detail: Northwest 4 feet at 10 seconds and southeast 2 feet at
6 seconds. Scattered showers.
.SUNDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas
4 to 6 feet. Wave Detail: North 5 feet at 11 seconds and east 3 feet
at 4 seconds.
.SUNDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots.
Seas 5 to 8 feet. Wave Detail: North 7 feet at 14 seconds and east
3 feet at 4 seconds. Scattered showers.
.MONDAY...East winds around 15 knots. Seas 5 to 8 feet. Scattered
showers in the morning.
.MONDAY NIGHT...East winds 15 to 20 knots. Seas 5 to 7 feet.
.TUESDAY...East winds 15 to 20 knots. Seas 5 to 7 feet.
.TUESDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 6 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ723-172030-
Anegada Passage east of Virgin Gorda and Saint Croix south to 17N-
337 AM AST Fri Oct 17 2025

.TODAY...South winds 10 to 15 knots with gusts up to 20 knots. Seas
around 4 feet. Wave Detail: South 4 feet at 5 seconds and northeast
2 feet at 13 seconds. Numerous showers early this morning. Isolated
thunderstorms until late afternoon. Scattered showers late this
morning and afternoon.
.TONIGHT...Southwest winds 10 to 15 knots with gusts up to 20 knots,
becoming south 5 to 10 knots after midnight. Seas 3 to 4 feet. Wave
Detail: Southwest 3 feet at 5 seconds and northeast 2 feet at
14 seconds. Scattered showers.
.SATURDAY...Southeast winds 5 to 10 knots. Seas 3 to 4 feet. Wave
Detail: South 3 feet at 6 seconds and north 2 feet at 13 seconds.
Scattered showers.
.SATURDAY 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 north 2 feet at 12 seconds.
.SUNDAY...East winds around 15 knots with gusts up to 25 knots. Seas
4 to 5 feet. Wave Detail: Southeast 4 feet at 5 seconds and north
3 feet at 11 seconds. Scattered showers in the afternoon.
.SUNDAY NIGHT...East winds 15 to 20 knots with gusts up to 25 knots.
Seas 4 to 6 feet. Wave Detail: East 5 feet at 6 seconds and north
3 feet at 11 seconds. Scattered showers.
.MONDAY...East winds 15 to 20 knots. Seas 5 to 7 feet.
.MONDAY NIGHT...East winds 15 to 20 knots. Seas 6 to 7 feet.
.TUESDAY...East winds around 20 knots. Seas 6 to 7 feet.
.TUESDAY NIGHT...East winds 15 to 20 knots. Seas 5 to 6 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ726-172030-
Coastal waters east of Puerto Rico, around Vieques, and around and
just north of Culebra and Saint John-
337 AM AST Fri Oct 17 2025

.TODAY...Southwest winds 10 to 15 knots with gusts up to 20 knots.
Seas 2 to 3 feet. Wave Detail: Southwest 3 feet at 4 seconds and
southeast 1 foot at 6 seconds. Numerous showers this morning.
Isolated thunderstorms until late afternoon. Scattered showers this
afternoon.
.TONIGHT...Southwest winds 10 to 15 knots with gusts up to 20 knots,
becoming south 5 to 10 knots after midnight. Seas 2 to 3 feet. Wave
Detail: South 3 feet at 5 seconds and east 1 foot at 10 seconds.
Numerous showers, mainly in the evening.
.SATURDAY...South winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Southeast 2 feet at 6 seconds. Scattered showers.
.SATURDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 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
3 to 4 feet. Wave Detail: East 3 feet at 5 seconds.
.SUNDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots.
Seas 4 to 6 feet. Wave Detail: East 4 feet at 5 seconds. Scattered
showers.
.MONDAY...East winds around 15 knots. Seas 4 to 6 feet. Scattered
showers in the morning.
.MONDAY NIGHT...East winds 15 to 20 knots. Seas 5 to 6 feet.
.TUESDAY...East winds 15 to 20 knots. Seas 5 to 6 feet.
.TUESDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 6 feet.

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-
337 AM AST Fri Oct 17 2025

.TODAY...South 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: South 3 feet at 5 seconds and east 1 foot at
12 seconds. Numerous showers this morning. Isolated thunderstorms.
Scattered showers this afternoon.
.TONIGHT...South winds 5 to 10 knots, diminishing to around 5 knots
after midnight. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at
6 seconds and west 1 foot at 4 seconds. Scattered showers.
.SATURDAY...Southeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Southeast 2 feet at 6 seconds and west 1 foot at 4 seconds.
Scattered showers.
.SATURDAY NIGHT...East winds 5 to 10 knots, increasing to 10 to
15 knots after midnight. Seas 2 to 3 feet. Wave Detail: Southeast
3 feet at 6 seconds.
.SUNDAY...East winds around 15 knots with gusts up to 25 knots. Seas
3 to 4 feet. Wave Detail: East 4 feet at 6 seconds.
.SUNDAY NIGHT...East winds 15 to 20 knots with gusts up to 25 knots.
Seas 4 to 5 feet. Wave Detail: East 5 feet at 6 seconds. Scattered
showers.
.MONDAY...East winds 15 to 20 knots. Seas 4 to 6 feet. Scattered
showers in the morning.
.MONDAY NIGHT...East winds 15 to 20 knots. Seas 5 to 6 feet.
.TUESDAY...East winds around 20 knots. Seas around 6 feet.
.TUESDAY NIGHT...East winds 15 to 20 knots. Seas 5 to 6 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ735-172030-
Coastal Waters of Southern Puerto Rico out 10 NM-
337 AM AST Fri Oct 17 2025

.TODAY...Southwest winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 5 seconds. Isolated thunderstorms. Numerous
showers early this morning, then scattered showers late this morning
and afternoon.
.TONIGHT...Southwest winds 5 to 10 knots, becoming east after
midnight. Seas around 2 feet. Wave Detail: Southeast 2 feet at
5 seconds and west 1 foot at 4 seconds. Scattered showers.
.SATURDAY...Southeast winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Southeast 2 feet at 6 seconds and west 1 foot at 4 seconds.
Scattered showers.
.SATURDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Southeast 2 feet at 6 seconds.
.SUNDAY...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.
.SUNDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots.
Seas 3 to 4 feet. Wave Detail: Southeast 4 feet at 6 seconds.
.MONDAY...Northeast winds 10 to 15 knots, becoming east 15 to
20 knots in the afternoon. Seas 3 to 5 feet.
.MONDAY NIGHT...East winds 10 to 15 knots. Seas 4 to 5 feet.
.TUESDAY...East winds 15 to 20 knots. Seas 4 to 6 feet.
.TUESDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to
15 knots after midnight. Seas 4 to 6 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ741-172030-
Mona Passage Southward to 17N-
337 AM AST Fri Oct 17 2025

.TODAY...Southwest winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Southwest 2 feet at 3 seconds and southeast 2 feet at
6 seconds. Numerous showers this morning. Isolated thunderstorms.
Scattered showers this afternoon.
.TONIGHT...South winds 5 to 10 knots. Seas 3 to 4 feet. Wave Detail:
North 3 feet at 10 seconds and south 2 feet at 5 seconds. Scattered
showers.
.SATURDAY...Southeast winds 5 to 10 knots. Seas 3 to 4 feet. Wave
Detail: North 3 feet at 10 seconds and southeast 2 feet at
6 seconds. Scattered showers.
.SATURDAY NIGHT...East winds 5 to 10 knots, increasing to 10 to
15 knots with gusts up to 20 knots after midnight. Seas 3 to 4 feet.
Wave Detail: Southeast 3 feet at 6 seconds and north 3 feet at
11 seconds.
.SUNDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas
4 to 5 feet. Wave Detail: Southeast 4 feet at 6 seconds and north
4 feet at 11 seconds.
.SUNDAY NIGHT...East winds 10 to 15 knots, increasing to 15 to
20 knots after midnight. Seas 6 to 7 feet. Wave Detail: North 6 feet
at 14 seconds and southeast 5 feet at 6 seconds.
.MONDAY...East winds 15 to 20 knots. Seas 6 to 8 feet.
.MONDAY NIGHT...East winds 15 to 20 knots. Seas 7 to 8 feet.
.TUESDAY...East winds 15 to 20 knots. Seas 6 to 8 feet.
.TUESDAY NIGHT...East winds 15 to 20 knots. Seas 6 to 8 feet.
Scattered showers.

Winds and seas higher in and near thunderstorms.

$$

AMZ742-172030-
Coastal Waters of Northwestern Puerto Rico out 10 NM-
337 AM AST Fri Oct 17 2025

.TODAY...Southwest winds around 10 knots. Seas 2 to 3 feet. Wave
Detail: Southwest 2 feet at 4 seconds and north 2 feet at 9 seconds.
Numerous showers this morning. Isolated thunderstorms. Scattered
showers this afternoon.
.TONIGHT...South winds 5 to 10 knots. Seas 2 to 4 feet. Wave Detail:
North 3 feet at 10 seconds and southwest 2 feet at 4 seconds.
Scattered showers.
.SATURDAY...Southeast winds 5 to 10 knots. Seas 2 to 4 feet. Wave
Detail: North 3 feet at 11 seconds and northeast 2 feet at
14 seconds. Scattered showers in the morning, then numerous showers
in the afternoon.
.SATURDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 4 feet. Wave
Detail: North 3 feet at 11 seconds and south 1 foot at 5 seconds.
Scattered showers.
.SUNDAY...East winds around 5 knots, becoming northeast in the
afternoon. Seas 3 to 5 feet. Wave Detail: North 3 feet at 9 seconds
and south 1 foot at 6 seconds. Scattered showers in the afternoon.
.SUNDAY NIGHT...East winds 5 to 10 knots. Seas 4 to 6 feet.
.MONDAY...East winds 5 to 10 knots. Seas 5 to 7 feet. Numerous
showers in the afternoon.
.MONDAY NIGHT...East winds 5 to 10 knots, increasing to 10 to
15 knots after midnight. Seas 4 to 6 feet.
.TUESDAY...East winds 10 to 15 knots. Seas 4 to 6 feet. Scattered
showers in the afternoon.
.TUESDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 5 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ745-172030-
Coastal Waters of Southwestern Puerto Rico out 10 NM-
337 AM AST Fri Oct 17 2025

.TODAY...South winds around 10 knots. Seas around 2 feet. Wave
Detail: Southwest 2 feet at 4 seconds and northwest 1 foot at
9 seconds. Numerous showers early this morning. Isolated
thunderstorms until late afternoon. Scattered showers late this
morning and afternoon.
.TONIGHT...Southeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Southwest 2 feet at 4 seconds and northwest 2 feet at
9 seconds. Scattered showers.
.SATURDAY...Southeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Northwest 3 feet at 11 seconds and southwest 1 foot at
4 seconds. Scattered showers.
.SATURDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Northwest 3 feet at 10 seconds and southeast 2 feet at
5 seconds.
.SUNDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas
2 to 4 feet. Wave Detail: Northwest 3 feet at 11 seconds and
southeast 2 feet at 6 seconds. Scattered showers in the afternoon.
.SUNDAY NIGHT...East winds 5 to 10 knots. Seas 4 to 6 feet. Wave
Detail: Northwest 5 feet at 14 seconds and southeast 2 feet at
6 seconds.
.MONDAY...East winds 5 to 10 knots, increasing to 10 to 15 knots in
the afternoon. Seas 4 to 6 feet. Scattered showers in the afternoon.
.MONDAY NIGHT...East winds 10 to 15 knots, diminishing to 5 to
10 knots after midnight. Seas 4 to 6 feet.
.TUESDAY...East winds 5 to 10 knots, becoming southeast 15 to
20 knots in the afternoon. Seas 4 to 6 feet.
.TUESDAY NIGHT...East winds 15 to 20 knots, diminishing to 5 to
10 knots after midnight. Seas 3 to 5 feet.

Winds and seas higher in and near thunderstorms.

$$