447
FZCA52 TJSJ 160738
CWFSJU

Coastal Waters Forecast
National Weather Service San Juan PR
338 AM AST Thu Oct 16 2025

Puerto Rico and the U.S. Virgin Islands Waters

AMZ700-162015-
338 AM AST Thu Oct 16 2025

.SYNOPSIS FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS WATERS...
The approaching frontal boundary will induce a pre-frontal trough
for the rest of the workweek, increasing shower and thunderstorm
activity across the regional waters and passages. This will also
increase wind speed from time to time with the heaviest thunderstorm
activity. Pulses of a long period easterly swell will reach the
local exposed waters by Thursday into Friday. Pulses of another long
period northerly swell associated to low pressure system over the
northwestern Atlantic waters will reach the Offshore and local
Atlantic waters and passages late in the weekend into the upcoming
workweek.

$$

AMZ711-162015-
Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N-
338 AM AST Thu Oct 16 2025

.TODAY...Southwest winds 10 to 15 knots with gusts up to 25 knots.
Seas 3 to 4 feet. Wave Detail: Southwest 3 feet at 4 seconds and
east 2 feet at 8 seconds. Isolated thunderstorms. Numerous showers
early this morning, then scattered showers late this morning and
afternoon.
.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. Numerous showers, mainly in the
evening.
.FRIDAY...Southwest winds 10 to 15 knots, diminishing to 5 to
10 knots in the afternoon. Seas 4 to 5 feet. Wave Detail: Southwest
3 feet at 5 seconds and north 3 feet at 8 seconds. Scattered
showers.
.FRIDAY NIGHT...West winds 5 to 10 knots, becoming southwest after
midnight. Seas 4 to 5 feet. Wave Detail: North 4 feet at 11 seconds
and northeast 3 feet at 14 seconds. Scattered showers.
.SATURDAY...South winds around 5 knots, becoming southeast in the
afternoon. 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 6 feet. Wave
Detail: North 5 feet at 11 seconds and south 1 foot at 4 seconds.
Numerous showers.
.SUNDAY...East winds 10 to 15 knots. Seas 5 to 7 feet. Numerous
showers, mainly in the morning.
.SUNDAY NIGHT...East winds around 15 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 around 15 knots. Seas 7 to 8 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ712-162015-
Coastal Waters of Northern Puerto Rico out 10 NM-
338 AM AST Thu Oct 16 2025

.TODAY...Southwest winds 10 to 15 knots with gusts up to 20 knots.
Seas 3 to 4 feet. Wave Detail: West 2 feet at 4 seconds and
northeast 2 feet at 8 seconds. Scattered showers this morning.
Isolated thunderstorms. Numerous showers this afternoon.
.TONIGHT...Southwest winds 10 to 15 knots with gusts up to 20 knots,
diminishing to 5 to 10 knots after midnight. Seas around 3 feet.
Wave Detail: West 2 feet at 5 seconds and northeast 2 feet at
8 seconds. Scattered showers in the evening.
.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 5 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. Scattered showers.
.SUNDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to
15 knots after midnight. 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 6 to 8 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ716-162015-
Coastal Waters from Cabo San Juan to the waters between Anegada
Island and Virgin Gorda and North 10 NM-
338 AM AST Thu Oct 16 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
northeast 2 feet at 8 seconds. Scattered showers this morning.
Isolated thunderstorms late this morning and afternoon. Numerous
showers this afternoon.
.TONIGHT...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
northeast 2 feet at 12 seconds. Scattered showers after midnight.
.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 11 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 northeast 2 feet at
12 seconds. Scattered showers.
.SUNDAY...East winds 10 to 15 knots. Seas 4 to 6 feet. Scattered
showers in the afternoon.
.SUNDAY NIGHT...East winds around 15 knots. Seas 5 to 8 feet.
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.

Winds and seas higher in and near thunderstorms.

$$

AMZ723-162015-
Anegada Passage east of Virgin Gorda and Saint Croix south to 17N-
338 AM AST Thu Oct 16 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
northeast 2 feet at 8 seconds. Scattered showers until late
afternoon. Isolated thunderstorms late this morning and afternoon.
Numerous showers late.
.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.
.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 14 seconds. Scattered showers.
.FRIDAY NIGHT...South winds around 10 knots. Seas 3 to 4 feet. Wave
Detail: South 3 feet at 6 seconds and northeast 2 feet at
15 seconds. Scattered showers.
.SATURDAY...South winds 5 to 10 knots. Seas 3 to 4 feet. Wave
Detail: South 3 feet at 6 seconds and east 2 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. Seas 4 to 5 feet.
.SUNDAY NIGHT...East winds 15 to 20 knots. Seas 5 to 7 feet.
Scattered showers.
.MONDAY...East winds 15 to 20 knots. Seas 5 to 7 feet.
.MONDAY NIGHT...East winds 15 to 20 knots. Seas 5 to 7 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ726-162015-
Coastal waters east of Puerto Rico, around Vieques, and around and
just north of Culebra and Saint John-
338 AM AST Thu Oct 16 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
east 1 foot at 8 seconds. Scattered showers. Isolated thunderstorms
late this morning and afternoon.
.TONIGHT...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
east 1 foot at 8 seconds. Scattered showers after midnight.
.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 east 1 foot
at 7 seconds. Scattered showers.
.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 4 feet. Wave
Detail: Southeast 2 feet at 6 seconds. Scattered showers.
.SUNDAY...East winds 10 to 15 knots. Seas 3 to 4 feet. Scattered
showers in the afternoon.
.SUNDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 6 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 4 to 6 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ733-162015-
Caribbean waters of Puerto Rico from 10 NM to 17N, including the
coastal waters of Saint Croix-
338 AM AST Thu Oct 16 2025

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

Winds and seas higher in and near thunderstorms.

$$

AMZ735-162015-
Coastal Waters of Southern Puerto Rico out 10 NM-
338 AM AST Thu Oct 16 2025

.TODAY...Southwest winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Southwest 2 feet at 4 seconds and east 1 foot at 6 seconds.
Isolated thunderstorms this morning. Scattered showers until late
afternoon, then isolated showers late.
.TONIGHT...Southwest winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Southwest 2 feet at 4 seconds and east 1 foot at 6 seconds.
Scattered showers in the evening, then numerous showers after
midnight.
.FRIDAY...Southwest winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 5 seconds and east 1 foot at 7 seconds.
Scattered showers.
.FRIDAY NIGHT...Southwest winds around 5 knots, becoming southeast
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 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 southwest 1 foot at 3 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. Seas 2 to 3 feet. Scattered
showers.
.SUNDAY NIGHT...East winds 10 to 15 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.

Winds and seas higher in and near thunderstorms.

$$

AMZ741-162015-
Mona Passage Southward to 17N-
338 AM AST Thu Oct 16 2025

.TODAY...Southwest winds 5 to 10 knots, increasing to 10 to 15 knots
with gusts up to 20 knots this afternoon. Seas 2 to 3 feet. Wave
Detail: Southwest 2 feet at 3 seconds and east 2 feet at 7 seconds.
Isolated thunderstorms until late afternoon. Scattered showers.
.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.
Scattered showers in the 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 8 seconds.
Scattered showers.
.FRIDAY NIGHT...Southwest winds 5 to 10 knots, becoming southeast
after midnight. Seas 3 to 4 feet. Wave Detail: North 3 feet at
10 seconds and southeast 2 feet at 6 seconds. Scattered showers in
the evening, then numerous showers after midnight.
.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
9 seconds. Numerous showers.
.SUNDAY...East winds 10 to 15 knots. Seas 4 to 5 feet. Scattered
showers in the morning.
.SUNDAY NIGHT...East winds 15 to 20 knots. Seas 5 to 7 feet.
.MONDAY...East winds 15 to 20 knots. Seas 7 to 8 feet.
.MONDAY NIGHT...East winds 15 to 20 knots. Seas 7 to 8 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ742-162015-
Coastal Waters of Northwestern Puerto Rico out 10 NM-
338 AM AST Thu Oct 16 2025

.TODAY...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
northeast 1 foot at 8 seconds. Numerous showers this morning.
Isolated thunderstorms until late afternoon. Scattered showers this
afternoon.
.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. Scattered showers in the 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 8 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. Numerous showers after midnight.
.SATURDAY...Southeast winds around 5 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 10 to
15 knots in the afternoon. Seas 3 to 5 feet. Scattered showers.
.SUNDAY NIGHT...East winds 10 to 15 knots. Seas 4 to 6 feet.
.MONDAY...East winds 5 to 10 knots. Seas 4 to 6 feet. Numerous
showers in the afternoon.
.MONDAY NIGHT...East winds around 5 knots, increasing to 5 to
10 knots after midnight. Seas 4 to 6 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ745-162015-
Coastal Waters of Southwestern Puerto Rico out 10 NM-
338 AM AST Thu Oct 16 2025

.TODAY...Southwest 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 this morning. Isolated thunderstorms
until late afternoon. Scattered showers this afternoon.
.TONIGHT...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 in the 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. Seas 2 to 3 feet. Wave
Detail: Southwest 2 feet at 4 seconds and northwest 2 feet at
8 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
6 seconds. Numerous showers.
.SUNDAY...East winds 5 to 10 knots. Seas 2 to 4 feet. Scattered
showers in the afternoon.
.SUNDAY NIGHT...East winds 5 to 10 knots. Seas 3 to 5 feet.
.MONDAY...East winds 10 to 15 knots. 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.

Winds and seas higher in and near thunderstorms.

$$