861
FZCA52 TJSJ 172026
CWFSJU

Coastal Waters Forecast
National Weather Service San Juan PR
426 PM AST Fri Oct 17 2025

Puerto Rico and the U.S. Virgin Islands Waters

AMZ700-180915-
426 PM 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 Saturday. A 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
late Saturday night or early Sunday morning into the upcoming
workweek. As a result, hazardous marine conditions are anticipated.
Please, continue to monitor the forecast updates over the coming
days.

$$

AMZ711-180915-
Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N-
426 PM AST Fri Oct 17 2025

.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. Isolated thunderstorms. Numerous showers early this
evening, then scattered showers late this evening and overnight.
.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 15 to 20 knots with gusts up to 25 knots. Seas
7 to 8 feet. Wave Detail: North 6 feet at 12 seconds and east 4 feet
at 5 seconds. Scattered showers in the morning.
.MONDAY NIGHT...East winds around 15 knots with gusts up to
25 knots. Seas around 7 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.
.WEDNESDAY...East winds 15 to 20 knots. Seas 5 to 6 feet.
.WEDNESDAY NIGHT...East winds 15 to 20 knots. Seas 5 to 6 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ712-180915-
Coastal Waters of Northern Puerto Rico out 10 NM-
426 PM AST Fri Oct 17 2025

.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 with isolated thunderstorms this evening, then
isolated showers after midnight. Isolated thunderstorms late.
.SATURDAY...Southeast winds around 5 knots, becoming east around
5 knots 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...Southeast winds 5 to 10 knots. Seas around 4 feet.
Wave Detail: North 4 feet at 9 seconds and north 3 feet at
12 seconds. Scattered showers.
.SUNDAY...East winds 5 to 10 knots, increasing to 10 to 15 knots in
the afternoon. Gusts up to 25 knots. Seas 5 to 6 feet, building to
6 to 8 feet in the afternoon. Wave Detail: North 6 feet at
11 seconds, becoming north 7 feet at 13 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. Wave Detail: North 7 feet at
12 seconds and east 4 feet at 5 seconds. Scattered showers in the
afternoon.
.MONDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots.
Seas 6 to 8 feet.
.TUESDAY...East winds 10 to 15 knots, increasing to 15 to 20 knots
in the afternoon. Seas around 6 feet.
.TUESDAY NIGHT...East winds 10 to 15 knots. Seas 5 to 6 feet.
.WEDNESDAY...East winds 10 to 15 knots. Seas around 5 feet.
.WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 4 to 5 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ716-180915-
Coastal Waters from Cabo San Juan to the waters between Anegada
Island and Virgin Gorda and North 10 NM-
426 PM AST Fri Oct 17 2025

.TONIGHT...Southwest winds 10 to 15 knots with gusts up to 20 knots,
diminishing to 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. Isolated thunderstorms early this
evening. Isolated thunderstorms late.
.SATURDAY...South winds 5 to 10 knots. Seas 3 to 4 feet. Wave
Detail: Northwest 4 feet at 10 seconds and northeast 2 feet at
14 seconds. Scattered showers.
.SATURDAY NIGHT...Southeast 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 25 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 with gusts up to 20 knots. Seas
5 to 8 feet. Wave Detail: North 7 feet at 13 seconds and east 4 feet
at 5 seconds. Scattered showers in the morning.
.MONDAY NIGHT...East winds around 15 knots with gusts up to
25 knots. Seas 5 to 7 feet.
.TUESDAY...East winds 15 to 20 knots. Seas 5 to 7 feet.
.TUESDAY NIGHT...East winds around 15 knots. Seas 4 to 6 feet.
.WEDNESDAY...East winds 15 to 20 knots. Seas 4 to 5 feet.
.WEDNESDAY NIGHT...East winds around 15 knots. Seas 4 to 5 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ723-180915-
Anegada Passage east of Virgin Gorda and Saint Croix south to 17N-
426 PM AST Fri Oct 17 2025

.TONIGHT...South winds 10 to 15 knots with gusts up to 20 knots,
diminishing to 5 to 10 knots late. Seas 3 to 4 feet. Wave Detail:
Southwest 3 feet at 5 seconds and northeast 2 feet at 14 seconds.
Scattered showers. Isolated thunderstorms early this evening.
Isolated thunderstorms after midnight.
.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 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 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 with gusts up to 25 knots. Seas
5 to 7 feet. Wave Detail: East 5 feet at 6 seconds and north 3 feet
at 13 seconds.
.MONDAY NIGHT...East winds 15 to 20 knots with gusts up to 25 knots.
Seas 5 to 7 feet.
.TUESDAY...East winds 15 to 20 knots. Seas 6 to 7 feet.
.TUESDAY NIGHT...East winds around 15 knots. Seas 5 to 6 feet.
.WEDNESDAY...East winds 15 to 20 knots. Seas 5 to 6 feet.
.WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 4 to 5 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ726-180915-
Coastal waters east of Puerto Rico, around Vieques, and around and
just north of Culebra and Saint John-
426 PM AST Fri Oct 17 2025

.TONIGHT...Southwest 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: South 3 feet at 5 seconds and east 1 foot at 10 seconds.
Numerous showers with isolated thunderstorms early this evening,
then scattered showers late this evening and overnight. Isolated
thunderstorms after midnight.
.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 25 knots.
Seas 4 to 6 feet. Wave Detail: East 4 feet at 5 seconds. Scattered
showers.
.MONDAY...East winds around 15 knots with gusts up to 25 knots. Seas
4 to 6 feet. Wave Detail: East 4 feet at 6 seconds. Scattered
showers in the morning.
.MONDAY NIGHT...East winds around 15 knots with gusts up to
25 knots. Seas 4 to 6 feet.
.TUESDAY...East winds 15 to 20 knots. Seas 4 to 6 feet.
.TUESDAY NIGHT...East winds around 15 knots. Seas 4 to 5 feet.
.WEDNESDAY...East winds 15 to 20 knots. Seas 4 to 5 feet.
.WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 4 to 5 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ733-180915-
Caribbean waters of Puerto Rico from 10 NM to 17N, including the
coastal waters of Saint Croix-
426 PM AST Fri Oct 17 2025

.TONIGHT...South winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail:
Southeast 3 feet at 6 seconds and west 1 foot at 4 seconds. Isolated
thunderstorms. Numerous showers early this evening, then scattered
showers late this evening and overnight.
.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 with gusts up to 20 knots after midnight. Seas 2 to 3 feet.
Wave Detail: Southeast 3 feet at 6 seconds.
.SUNDAY...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.
.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 with gusts up to 25 knots. Seas
4 to 6 feet. Wave Detail: East 5 feet at 6 seconds. Scattered
showers in the morning.
.MONDAY NIGHT...East winds 15 to 20 knots with gusts up to 25 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 5 to 6 feet.
.WEDNESDAY...East winds 15 to 20 knots. Seas 5 to 6 feet.
.WEDNESDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to
15 knots after midnight. Seas 5 to 7 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ735-180915-
Coastal Waters of Southern Puerto Rico out 10 NM-
426 PM AST Fri Oct 17 2025

.TONIGHT...Southwest winds 5 to 10 knots, becoming south late this
evening and early morning, then becoming southeast late. Seas around
2 feet. Wave Detail: Southeast 2 feet at 5 seconds and west 1 foot
at 4 seconds. Scattered showers with isolated thunderstorms.
.SATURDAY...Southeast winds around 5 knots, increasing to 5 to
10 knots in the afternoon. 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...East winds 10 to 15 knots, increasing to 15 to 20 knots in
the afternoon. Seas 3 to 5 feet. Wave Detail: East 4 feet at
6 seconds.
.MONDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots.
Seas 4 to 5 feet.
.TUESDAY...East winds 10 to 15 knots, increasing to 15 to 20 knots
in the afternoon. Seas 4 to 5 feet.
.TUESDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to
15 knots after midnight. Seas 4 to 5 feet.
.WEDNESDAY...East winds 10 to 15 knots, increasing to 15 to 20 knots
in the afternoon. Seas 4 to 5 feet.
.WEDNESDAY 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.

$$

AMZ741-180915-
Mona Passage Southward to 17N-
426 PM AST Fri Oct 17 2025

.TONIGHT...South winds 5 to 10 knots, becoming around 5 knots late.
Seas 3 to 4 feet. Wave Detail: North 3 feet at 10 seconds and south
2 feet at 5 seconds. Scattered showers with isolated thunderstorms.
.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. 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 6 feet. Wave Detail: Southeast 4 feet at 6 seconds and north
4 feet at 11 seconds.
.SUNDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots.
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 with gusts up to 25 knots. Seas
6 to 8 feet. Wave Detail: Southeast 6 feet at 7 seconds and north
6 feet at 14 seconds.
.MONDAY NIGHT...East winds 15 to 20 knots with gusts up to 25 knots.
Seas 6 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 7 feet.
Scattered showers.
.WEDNESDAY...East winds 15 to 20 knots. Seas 5 to 7 feet. Scattered
showers.
.WEDNESDAY NIGHT...East winds 15 to 20 knots. Seas 5 to 8 feet.
Scattered showers.

Winds and seas higher in and near thunderstorms.

$$

AMZ742-180915-
Coastal Waters of Northwestern Puerto Rico out 10 NM-
426 PM AST Fri Oct 17 2025

.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 with isolated thunderstorms early this evening,
then isolated showers late this evening and early morning. Scattered
showers with isolated thunderstorms late.
.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 with gusts up to 20 knots. Seas
5 to 7 feet. Wave Detail: North 7 feet at 13 seconds and south
1 foot at 7 seconds. Numerous showers in the afternoon.
.MONDAY NIGHT...East winds 5 to 10 knots. Seas 4 to 6 feet.
.TUESDAY...East winds 5 to 10 knots. Seas 4 to 6 feet. Scattered
showers in the afternoon.
.TUESDAY NIGHT...East winds 5 to 10 knots. Seas 3 to 5 feet.
.WEDNESDAY...East winds 5 to 10 knots. Seas 3 to 5 feet. Scattered
showers in the afternoon.
.WEDNESDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 4 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ745-180915-
Coastal Waters of Southwestern Puerto Rico out 10 NM-
426 PM AST Fri Oct 17 2025

.TONIGHT...South winds 5 to 10 knots, becoming southeast after
midnight. Seas 2 to 3 feet. Wave Detail: Southwest 2 feet at
4 seconds and northwest 2 feet at 9 seconds. Scattered showers this
evening, then isolated showers after midnight. Scattered showers
with isolated thunderstorms late.
.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
with gusts up to 20 knots in the afternoon. Seas 4 to 6 feet. Wave
Detail: Northwest 5 feet at 14 seconds and southeast 3 feet at
7 seconds. Scattered showers in the afternoon.
.MONDAY NIGHT...East winds 5 to 10 knots. Seas 4 to 6 feet.
.TUESDAY...East winds 5 to 10 knots, increasing to 15 to 20 knots in
the afternoon. Seas 3 to 5 feet.
.TUESDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to
15 knots after midnight. Seas 4 to 6 feet.
.WEDNESDAY...East winds 5 to 10 knots, becoming southeast 15 to
20 knots in the afternoon. Seas 2 to 4 feet.
.WEDNESDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to
15 knots after midnight. Seas 3 to 5 feet.

Winds and seas higher in and near thunderstorms.

$$