459
FZCA52 TJSJ 162016
CWFSJU

Coastal Waters Forecast
National Weather Service San Juan PR
416 PM AST Thu Oct 16 2025

Puerto Rico and the U.S. Virgin Islands Waters

AMZ700-170930-
416 PM AST Thu Oct 16 2025

.SYNOPSIS FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS WATERS...
The approaching frontal boundary is inducing a pre-frontal trough,
increasing shower and thunderstorm activity across the regional
waters and passages for the rest of the workweek. 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 tonight into Friday. A 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.

$$

AMZ711-170930-
Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N-
416 PM AST Thu Oct 16 2025

.TONIGHT...Southwest winds 10 to 15 knots with gusts up to 20 knots.
Seas 3 to 5 feet. Wave Detail: Southwest 3 feet at 5 seconds and
northeast 3 feet at 12 seconds. Isolated thunderstorms. Numerous
showers early this evening, then scattered showers late this evening
and overnight.
.FRIDAY...Southwest winds 5 to 10 knots with gusts up to 20 knots.
Seas 4 to 5 feet. Wave Detail: Southwest 3 feet at 4 seconds and
north 3 feet at 8 seconds. Scattered showers.
.FRIDAY NIGHT...Southwest winds 5 to 10 knots with gusts up to
20 knots, diminishing to around 5 knots after midnight. Seas 4 to
5 feet. Wave Detail: North 4 feet at 10 seconds and northeast 3 feet
at 13 seconds. Scattered showers.
.SATURDAY...Southeast winds around 5 knots. Seas 4 to 5 feet. Wave
Detail: North 4 feet at 10 seconds and east 2 feet at 9 seconds.
Scattered showers.
.SATURDAY NIGHT...East winds 5 to 10 knots. Seas 4 to 5 feet. Wave
Detail: North 5 feet at 10 seconds and south 1 foot at 4 seconds.
Numerous showers.
.SUNDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas
5 to 7 feet. Wave Detail: North 6 feet at 11 seconds and east 3 feet
at 8 seconds. Numerous showers, mainly in the morning.
.SUNDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots.
Seas 7 to 8 feet. Scattered showers.
.MONDAY...East winds around 15 knots. Seas 7 to 8 feet. Scattered
showers in the morning.
.MONDAY NIGHT...East winds 15 to 20 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.

$$

AMZ712-170930-
Coastal Waters of Northern Puerto Rico out 10 NM-
416 PM AST Thu Oct 16 2025

.TONIGHT...Southwest winds 5 to 10 knots. Seas around 3 feet. Wave
Detail: West 2 feet at 5 seconds and northeast 2 feet at 8 seconds.
Scattered showers early this evening, then isolated showers late
this evening and overnight. Isolated thunderstorms after midnight.
.FRIDAY...Southwest winds 5 to 10 knots, becoming west in the
afternoon. Seas 3 to 4 feet. Wave Detail: North 3 feet at 9 seconds
and west 2 feet at 4 seconds. Showers in the afternoon.
.FRIDAY NIGHT...Southwest winds 5 to 10 knots, becoming south after
midnight. 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.
.SATURDAY NIGHT...East winds 5 to 10 knots. Seas 4 to 5 feet. Wave
Detail: North 4 feet at 12 seconds and north 3 feet at 9 seconds.
Numerous showers.
.SUNDAY...East winds 5 to 10 knots, increasing to 10 to 15 knots in
the afternoon. Seas 5 to 6 feet. Wave Detail: North 6 feet at
11 seconds and east 2 feet at 4 seconds. Scattered showers.
.SUNDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots.
Seas 6 to 8 feet. 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 10 to 15 knots, increasing to 15 to 20 knots
in the afternoon. Seas 6 to 7 feet.
.TUESDAY NIGHT...East winds 10 to 15 knots. Seas 5 to 6 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ716-170930-
Coastal Waters from Cabo San Juan to the waters between Anegada
Island and Virgin Gorda and North 10 NM-
416 PM AST Thu Oct 16 2025

.TONIGHT...Southwest winds 10 to 15 knots with gusts up to 20 knots.
Seas 2 to 4 feet. Wave Detail: Southwest 3 feet at 4 seconds and
northeast 2 feet at 12 seconds. Isolated showers this evening.
Scattered showers after midnight. Isolated thunderstorms late.
.FRIDAY...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 in the afternoon.
.FRIDAY NIGHT...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 11 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...Southeast winds 5 to 10 knots. Seas 3 to 4 feet.
Wave Detail: Northwest 4 feet at 10 seconds and northeast 2 feet at
12 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 3 seconds. Scattered showers in the afternoon.
.SUNDAY NIGHT...East winds around 15 knots with gusts up to
25 knots. Seas 5 to 7 feet. Scattered showers.
.MONDAY...East winds around 15 knots. Seas 5 to 7 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.

$$

AMZ723-170930-
Anegada Passage east of Virgin Gorda and Saint Croix south to 17N-
416 PM AST Thu Oct 16 2025

.TONIGHT...Southwest winds 10 to 15 knots with gusts up to 20 knots.
Seas 3 to 4 feet. Wave Detail: South 3 feet at 5 seconds and
northeast 2 feet at 12 seconds. Scattered showers. Isolated
thunderstorms after midnight.
.FRIDAY...Southwest winds 10 to 15 knots with gusts up to 20 knots.
Seas 3 to 4 feet. Wave Detail: South 3 feet at 5 seconds and
northeast 2 feet at 13 seconds. Scattered showers.
.FRIDAY NIGHT...South winds 10 to 15 knots. Seas 3 to 4 feet. Wave
Detail: South 3 feet at 6 seconds and east 2 feet at 9 seconds.
Scattered showers.
.SATURDAY...South winds 5 to 10 knots. Seas 3 to 4 feet. Wave
Detail: South 3 feet at 5 seconds and southeast 3 feet at 9 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.
.SUNDAY NIGHT...East winds 15 to 20 knots with gusts up to 25 knots.
Seas 4 to 6 feet. 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 15 to 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.

$$

AMZ726-170930-
Coastal waters east of Puerto Rico, around Vieques, and around and
just north of Culebra and Saint John-
416 PM AST Thu Oct 16 2025

.TONIGHT...Southwest winds 10 to 15 knots with gusts up to 20 knots.
Seas 2 to 3 feet. Wave Detail: Southwest 2 feet at 4 seconds and
east 1 foot at 8 seconds. Isolated showers this evening, then
scattered showers after midnight. Isolated thunderstorms late.
.FRIDAY...Southwest winds 10 to 15 knots with gusts up to 20 knots.
Seas 2 to 3 feet. Wave Detail: Southwest 2 feet at 4 seconds and
east 1 foot at 6 seconds. Scattered showers in the afternoon.
.FRIDAY NIGHT...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: Southwest 2 feet at 4 seconds and southeast
2 feet at 7 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 7 seconds and south 1 foot at 4 seconds.
Scattered showers.
.SATURDAY NIGHT...Southeast 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 6 seconds and southeast
2 feet at 3 seconds. Scattered showers in the afternoon.
.SUNDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots.
Seas 3 to 5 feet. 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.

$$

AMZ733-170930-
Caribbean waters of Puerto Rico from 10 NM to 17N, including the
coastal waters of Saint Croix-
416 PM AST Thu Oct 16 2025

.TONIGHT...Southwest winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: South 2 feet at 4 seconds and east 1 foot at 8 seconds.
Isolated showers this evening, then scattered showers with isolated
thunderstorms after midnight.
.FRIDAY...Southwest winds 5 to 10 knots, increasing to 10 to
15 knots in the afternoon. Seas 2 to 3 feet. Wave Detail: South
3 feet at 5 seconds and east 1 foot at 8 seconds. Scattered showers.
.FRIDAY NIGHT...South winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: South 3 feet at 6 seconds and east 1 foot at 11 seconds.
Scattered showers.
.SATURDAY...Southeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Southeast 3 feet at 6 seconds and northeast 1 foot at
11 seconds. Numerous showers, mainly in the morning.
.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. Scattered showers.
.SUNDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas
3 to 4 feet. Wave Detail: Southeast 4 feet at 6 seconds.
.SUNDAY NIGHT...East winds 15 to 20 knots with gusts up to 25 knots.
Seas 4 to 5 feet. Scattered showers.
.MONDAY...East winds 15 to 20 knots. Seas 5 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 around 6 feet.
.TUESDAY NIGHT...East winds 15 to 20 knots. Seas 5 to 6 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ735-170930-
Coastal Waters of Southern Puerto Rico out 10 NM-
416 PM AST Thu Oct 16 2025

.TONIGHT...Southwest winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Southwest 2 feet at 4 seconds and east 1 foot at 7 seconds.
Scattered showers this evening. Isolated thunderstorms. Numerous
showers after midnight.
.FRIDAY...Southwest winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Southwest 2 feet at 5 seconds and east 1 foot at 7 seconds.
Scattered showers.
.FRIDAY NIGHT...Southwest winds around 5 knots, becoming east after
midnight. Seas around 2 feet. Wave Detail: South 2 feet at
6 seconds. Scattered showers in the evening, then numerous showers
after midnight.
.SATURDAY...Southeast winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Southeast 2 feet at 6 seconds. Numerous showers, mainly in
the morning.
.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
2 to 3 feet. Wave Detail: Southeast 3 feet at 6 seconds. Scattered
showers.
.SUNDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots.
Seas 3 to 4 feet.
.MONDAY...East winds 10 to 15 knots, increasing to 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 10 to 15 knots, increasing to 15 to 20 knots
in the afternoon. 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.

$$

AMZ741-170930-
Mona Passage Southward to 17N-
416 PM AST Thu Oct 16 2025

.TONIGHT...Southwest winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Southwest 2 feet at 4 seconds and east 2 feet at 8 seconds.
Isolated thunderstorms early this evening. Scattered showers this
evening, then numerous showers with isolated thunderstorms after
midnight.
.FRIDAY...Southwest winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Southwest 2 feet at 4 seconds and north 2 feet at 8 seconds.
Scattered showers.
.FRIDAY NIGHT...South winds 5 to 10 knots, diminishing to around
5 knots after midnight. Seas 3 to 4 feet. Wave Detail: North 3 feet
at 10 seconds and southeast 2 feet at 6 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. Seas 3 to 4 feet. Wave
Detail: Southeast 3 feet at 6 seconds and north 3 feet at
10 seconds. Numerous showers.
.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. Scattered showers in the morning.
.SUNDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots.
Seas 5 to 7 feet.
.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.

$$

AMZ742-170930-
Coastal Waters of Northwestern Puerto Rico out 10 NM-
416 PM AST Thu Oct 16 2025

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

Winds and seas higher in and near thunderstorms.

$$

AMZ745-170930-
Coastal Waters of Southwestern Puerto Rico out 10 NM-
416 PM AST Thu Oct 16 2025

.TONIGHT...South winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Southwest 2 feet at 4 seconds and northwest 1 foot at
9 seconds. Isolated thunderstorms. Scattered showers this evening,
then numerous showers after midnight.
.FRIDAY...Southwest winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Southwest 2 feet at 4 seconds and northwest 1 foot at
9 seconds. Scattered showers.
.FRIDAY NIGHT...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 in
the evening, then numerous showers after midnight.
.SATURDAY...Southeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Northwest 3 feet at 11 seconds and south 1 foot at
5 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 south 1 foot at
4 seconds. Numerous showers.
.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 3 to 5 feet.
.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 5 to 10 knots. Seas 4 to 6 feet.
.TUESDAY...East winds 10 to 15 knots, becoming southeast 15 to
20 knots in the afternoon. Seas 4 to 6 feet.
.TUESDAY NIGHT...East winds 10 to 15 knots, diminishing to 5 to
10 knots after midnight. Seas 3 to 5 feet.

Winds and seas higher in and near thunderstorms.

$$