484
FZCA52 TJSJ 200807
CWFSJU

Coastal Waters Forecast
National Weather Service San Juan PR
407 AM AST Thu Nov 20 2025

Puerto Rico and the U.S. Virgin Islands Waters

AMZ700-202045-
407 AM AST Thu Nov 20 2025

.SYNOPSIS FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS WATERS...

A long period north-northeasterly swell will continue to move across
the local waters through this evening. An upper-level short-wave
trough will help to promote afternoon thunderstorms across the Mona
Passage and Caribbean waters. The remnants of the frontal boundary
will slowly dissipate across the western Atlantic through Friday,
when a surface high is expected to build over the region. This high
pressure will promote moderate trade winds from the upcoming weekend
into early next week.

$$

AMZ711-202045-
Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N-
407 AM AST Thu Nov 20 2025

.TODAY...Northeast winds 10 to 15 knots. Seas around 5 feet. Wave
Detail: East 3 feet at 5 seconds and north 3 feet at 11 seconds.
Scattered showers early this morning, then isolated showers late
this morning. Scattered showers this afternoon.
.TONIGHT...Northeast winds 10 to 15 knots with gusts up to 20 knots.
Seas 4 to 5 feet. Wave Detail: East 3 feet at 5 seconds and north
3 feet at 10 seconds. Scattered showers.
.FRIDAY...Northeast winds 10 to 15 knots with gusts up to 20 knots.
Seas around 4 feet. Wave Detail: East 3 feet at 5 seconds and north
3 feet at 9 seconds. Scattered showers in the morning.
.FRIDAY NIGHT...Northeast winds 10 to 15 knots with gusts up to
20 knots. Seas around 4 feet. Wave Detail: Northeast 3 feet at
5 seconds and north 2 feet at 9 seconds.
.SATURDAY...Northeast winds 10 to 15 knots. Seas 3 to 4 feet. Wave
Detail: East 3 feet at 5 seconds and north 2 feet at 8 seconds.
.SATURDAY NIGHT...Northeast winds around 10 knots with gusts up to
20 knots. Seas 3 to 4 feet. Wave Detail: East 3 feet at 5 seconds
and north 2 feet at 8 seconds. Scattered showers after midnight.
.SUNDAY...Northeast winds around 10 knots. Seas around 3 feet.
Scattered showers in the morning.
.SUNDAY NIGHT...Northeast winds 10 to 15 knots. Seas 3 to 4 feet.
Scattered showers.
.MONDAY...East winds 10 to 15 knots. Seas 3 to 4 feet. Scattered
showers in the morning.
.MONDAY NIGHT...Northeast winds 10 to 15 knots. Seas 3 to 4 feet.

$$

AMZ712-202045-
Coastal Waters of Northern Puerto Rico out 10 NM-
407 AM AST Thu Nov 20 2025

.TODAY...East winds 5 to 10 knots. Seas 4 to 5 feet. Wave Detail:
Northeast 3 feet at 5 seconds and north 3 feet at 11 seconds.
Isolated showers early this morning, then scattered showers with
isolated thunderstorms late this morning and early afternoon.
Isolated showers late.
.TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas
around 4 feet. Wave Detail: Northeast 3 feet at 5 seconds and north
3 feet at 11 seconds. Scattered showers.
.FRIDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas
around 4 feet. Wave Detail: Northeast 3 feet at 5 seconds and north
2 feet at 10 seconds. Scattered showers.
.FRIDAY NIGHT...Northeast winds 10 to 15 knots with gusts up to
20 knots. Seas 3 to 4 feet. Wave Detail: Northeast 3 feet at
5 seconds and north 2 feet at 9 seconds. Scattered showers after
midnight.
.SATURDAY...Northeast winds 10 to 15 knots with gusts up to
20 knots. Seas 3 to 4 feet. Wave Detail: Northeast 3 feet at
5 seconds and north 2 feet at 8 seconds.
.SATURDAY NIGHT...East winds 5 to 10 knots. Seas around 3 feet. Wave
Detail: Northeast 2 feet at 5 seconds and north 2 feet at 8 seconds.
Scattered showers after midnight.
.SUNDAY...East winds 5 to 10 knots. Seas around 3 feet.
.SUNDAY NIGHT...East winds 5 to 10 knots. Seas around 3 feet.
Scattered showers.
.MONDAY...East winds 5 to 10 knots. Seas around 3 feet.
.MONDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet.
Scattered showers.

Winds and seas higher in and near thunderstorms.

$$

AMZ716-202045-
Coastal Waters from Cabo San Juan to the waters between Anegada
Island and Virgin Gorda and North 10 NM-
407 AM AST Thu Nov 20 2025

.TODAY...Northeast winds 10 to 15 knots. Seas 3 to 5 feet. Wave
Detail: Northeast 3 feet at 4 seconds and north 3 feet at
11 seconds. Scattered showers. Isolated thunderstorms this
afternoon.
.TONIGHT...Northeast winds 10 to 15 knots with gusts up to 20 knots.
Seas 3 to 4 feet. Wave Detail: Northeast 3 feet at 4 seconds and
north 3 feet at 11 seconds. Scattered showers after midnight.
.FRIDAY...Northeast winds 10 to 15 knots. Seas 3 to 4 feet. Wave
Detail: Northeast 3 feet at 4 seconds and north 3 feet at
10 seconds.
.FRIDAY NIGHT...Northeast winds 10 to 15 knots with gusts up to
20 knots. Seas 3 to 4 feet. Wave Detail: Northeast 3 feet at
4 seconds and north 2 feet at 9 seconds. Scattered showers after
midnight.
.SATURDAY...Northeast winds 10 to 15 knots. Seas 2 to 4 feet. Wave
Detail: Northeast 3 feet at 4 seconds and north 2 feet at 9 seconds.
.SATURDAY NIGHT...Northeast winds around 10 knots. Seas 2 to 3 feet.
Wave Detail: Northeast 2 feet at 4 seconds and north 2 feet at
8 seconds.
.SUNDAY...Northeast winds around 10 knots. Seas 2 to 3 feet.
Scattered showers in the morning.
.SUNDAY NIGHT...Northeast winds 10 to 15 knots. Seas 2 to 3 feet.
.MONDAY...East winds 10 to 15 knots. Seas 2 to 3 feet.
.MONDAY NIGHT...Northeast winds 10 to 15 knots. Seas 2 to 3 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ723-202045-
Anegada Passage east of Virgin Gorda and Saint Croix south to 17N-
407 AM AST Thu Nov 20 2025

.TODAY...East winds 10 to 15 knots. Seas around 4 feet. Wave Detail:
East 3 feet at 5 seconds and northeast 2 feet at 13 seconds.
Numerous showers this morning. Isolated thunderstorms. Scattered
showers this afternoon.
.TONIGHT...Northeast winds 10 to 15 knots with gusts up to 20 knots.
Seas 3 to 4 feet. Wave Detail: Northeast 3 feet at 5 seconds and
northeast 2 feet at 13 seconds.
.FRIDAY...Northeast winds 10 to 15 knots with gusts up to 20 knots.
Seas 3 to 4 feet. Wave Detail: Northeast 3 feet at 4 seconds and
northeast 2 feet at 12 seconds.
.FRIDAY NIGHT...Northeast winds 10 to 15 knots with gusts up to
20 knots. Seas 3 to 4 feet. Wave Detail: Northeast 3 feet at
5 seconds and northeast 2 feet at 12 seconds. Scattered showers
after midnight.
.SATURDAY...Northeast winds 10 to 15 knots with gusts up to
20 knots. Seas around 3 feet. Wave Detail: Northeast 3 feet at
5 seconds and northeast 1 foot at 11 seconds.
.SATURDAY NIGHT...Northeast winds 10 to 15 knots with gusts up to
20 knots. Seas around 3 feet. Wave Detail: Northeast 3 feet at
5 seconds and northeast 1 foot at 11 seconds.
.SUNDAY...Northeast winds around 10 knots. Seas around 3 feet.
.SUNDAY NIGHT...Northeast winds 10 to 15 knots. Seas around 3 feet.
.MONDAY...East winds 10 to 15 knots. Seas around 3 feet.
.MONDAY NIGHT...Northeast winds 10 to 15 knots. Seas around 3 feet.
Scattered showers.

Winds and seas higher in and near thunderstorms.

$$

AMZ726-202045-
Coastal waters east of Puerto Rico, around Vieques, and around and
just north of Culebra and Saint John-
407 AM AST Thu Nov 20 2025

.TODAY...East winds 10 to 15 knots. Seas 2 to 4 feet. Wave Detail:
East 3 feet at 5 seconds. Scattered showers with isolated
thunderstorms.
.TONIGHT...Northeast winds 10 to 15 knots with gusts up to 20 knots.
Seas 2 to 4 feet. Wave Detail: Northeast 3 feet at 5 seconds.
Scattered showers after midnight.
.FRIDAY...Northeast winds 10 to 15 knots with gusts up to 20 knots.
Seas 2 to 3 feet. Wave Detail: Northeast 3 feet at 5 seconds.
Scattered showers.
.FRIDAY NIGHT...Northeast winds 10 to 15 knots with gusts up to
20 knots. Seas 2 to 3 feet. Wave Detail: Northeast 3 feet at
5 seconds.
.SATURDAY...Northeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: East 2 feet at 5 seconds.
.SATURDAY NIGHT...Northeast winds around 10 knots. Seas 2 to 3 feet.
Wave Detail: East 2 feet at 5 seconds.
.SUNDAY...Northeast winds around 10 knots. Seas 2 to 3 feet.
.SUNDAY NIGHT...Northeast winds 10 to 15 knots. Seas 2 to 3 feet.
.MONDAY...East winds 10 to 15 knots. Seas 2 to 3 feet.
.MONDAY NIGHT...Northeast winds 10 to 15 knots. Seas 2 to 3 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ733-202045-
Caribbean waters of Puerto Rico from 10 NM to 17N, including the
coastal waters of Saint Croix-
407 AM AST Thu Nov 20 2025

.TODAY...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 and northeast
1 foot at 13 seconds. Isolated thunderstorms. Numerous showers,
mainly this morning.
.TONIGHT...Northeast winds 10 to 15 knots with gusts up to 20 knots.
Seas around 3 feet. Wave Detail: East 3 feet at 5 seconds and
northeast 1 foot at 12 seconds. Scattered showers.
.FRIDAY...Northeast winds 10 to 15 knots with gusts up to 20 knots.
Seas around 3 feet. Wave Detail: East 3 feet at 5 seconds and
northeast 1 foot at 12 seconds. Scattered showers in the morning.
.FRIDAY NIGHT...Northeast winds 10 to 15 knots, increasing to 15 to
20 knots after midnight. Seas around 3 feet. Wave Detail: East
3 feet at 5 seconds. Scattered showers in the evening.
.SATURDAY...Northeast winds 10 to 15 knots with gusts up to
25 knots. Seas around 3 feet. Wave Detail: East 3 feet at 5 seconds.
.SATURDAY NIGHT...Northeast winds 10 to 15 knots with gusts up to
25 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 5 seconds.
Scattered showers in the evening.
.SUNDAY...Northeast winds 10 to 15 knots. Seas 2 to 3 feet.
.SUNDAY NIGHT...Northeast winds 10 to 15 knots. Seas 2 to 3 feet.
.MONDAY...East winds 10 to 15 knots. Seas 2 to 3 feet.
.MONDAY NIGHT...East winds 10 to 15 knots. Seas around 3 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ735-202045-
Coastal Waters of Southern Puerto Rico out 10 NM-
407 AM AST Thu Nov 20 2025

.TODAY...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail:
East 3 feet at 6 seconds. Scattered showers until late afternoon.
Isolated thunderstorms late this morning and afternoon. Numerous
showers late.
.TONIGHT...Northeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: East 3 feet at 6 seconds. Numerous showers in the evening.
.FRIDAY...Northeast winds 5 to 10 knots, becoming east 10 to
15 knots in the afternoon. Seas 2 to 3 feet. Wave Detail: East
2 feet at 6 seconds. Scattered showers in the afternoon.
.FRIDAY NIGHT...Northeast winds 5 to 10 knots with gusts up to
20 knots. Seas 2 to 3 feet. Wave Detail: East 2 feet at 5 seconds.
Scattered showers in the evening.
.SATURDAY...Northeast winds 5 to 10 knots, becoming east 10 to
15 knots in the afternoon. Seas around 2 feet. Wave Detail: East
2 feet at 5 seconds. Scattered showers in the afternoon.
.SATURDAY NIGHT...Northeast winds 10 to 15 knots with gusts up to
20 knots, diminishing to 5 to 10 knots after midnight. Seas around
2 feet. Wave Detail: East 2 feet at 5 seconds. Scattered showers in
the evening.
.SUNDAY...East winds 5 to 10 knots. Seas around 2 feet.
.SUNDAY NIGHT...Northeast winds 5 to 10 knots. Seas around 2 feet.
.MONDAY...Northeast winds 5 to 10 knots, becoming east 10 to
15 knots in the afternoon. Seas around 2 feet. Scattered showers in
the morning.
.MONDAY NIGHT...Northeast winds 10 to 15 knots. Seas around 2 feet.

Winds and seas higher in and near thunderstorms.

$$

AMZ741-202045-
Mona Passage Southward to 17N-
407 AM AST Thu Nov 20 2025

.TODAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas
4 to 5 feet. Wave Detail: East 4 feet at 6 seconds and north 2 feet
at 11 seconds. Isolated showers early this morning. Scattered
showers late this morning, then isolated showers this afternoon.
.TONIGHT...Northeast winds 10 to 15 knots with gusts up to 25 knots.
Seas 4 to 5 feet. Wave Detail: East 3 feet at 6 seconds and north
2 feet at 11 seconds. Scattered showers in the evening.
.FRIDAY...Northeast 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 north
2 feet at 10 seconds.
.FRIDAY NIGHT...Northeast winds 10 to 15 knots with gusts up to
25 knots. Seas 3 to 4 feet. Wave Detail: East 3 feet at 5 seconds
and north 2 feet at 9 seconds. Scattered showers.
.SATURDAY...Northeast winds 10 to 15 knots with gusts up to
25 knots. Seas 3 to 4 feet. Wave Detail: Northeast 3 feet at
5 seconds and north 2 feet at 8 seconds.
.SATURDAY NIGHT...Northeast winds 10 to 15 knots with gusts up to
20 knots. Seas 3 to 4 feet. Wave Detail: Northeast 3 feet at
5 seconds and north 2 feet at 8 seconds. Scattered showers in the
evening.
.SUNDAY...Northeast winds 10 to 15 knots, diminishing to 5 to
10 knots in the afternoon. Seas around 3 feet. Scattered showers in
the afternoon.
.SUNDAY NIGHT...Northeast winds 10 to 15 knots. Seas 3 to 4 feet.
Scattered showers.
.MONDAY...East winds 10 to 15 knots. Seas around 3 feet.
.MONDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet.

$$

AMZ742-202045-
Coastal Waters of Northwestern Puerto Rico out 10 NM-
407 AM AST Thu Nov 20 2025

.TODAY...East winds 10 to 15 knots with gusts up to 20 knots,
becoming northeast 5 to 10 knots late this morning and early
afternoon, then increasing to 10 to 15 knots with gusts up to
20 knots late. Seas 2 to 4 feet. Wave Detail: Northeast 3 feet at
5 seconds and north 3 feet at 10 seconds. Isolated showers early
this morning. Scattered showers with isolated thunderstorms this
afternoon.
.TONIGHT...Northeast winds 10 to 15 knots with gusts up to 20 knots.
Seas 2 to 4 feet. Wave Detail: Northeast 3 feet at 5 seconds and
north 3 feet at 11 seconds. Scattered showers in the evening.
.FRIDAY...Northeast winds 10 to 15 knots with gusts up to 20 knots.
Seas 2 to 4 feet. Wave Detail: Northeast 3 feet at 4 seconds and
north 3 feet at 10 seconds. Scattered showers in the afternoon.
.FRIDAY NIGHT...Northeast winds 10 to 15 knots with gusts up to
20 knots. Seas 2 to 4 feet. Wave Detail: Northeast 3 feet at
4 seconds and north 2 feet at 9 seconds.
.SATURDAY...Northeast winds 10 to 15 knots with gusts up to
20 knots. Seas 2 to 4 feet. Wave Detail: Northeast 3 feet at
5 seconds and north 2 feet at 9 seconds.
.SATURDAY NIGHT...Northeast winds 10 to 15 knots with gusts up to
20 knots. Seas 2 to 3 feet. Wave Detail: Northeast 3 feet at
4 seconds and north 2 feet at 8 seconds.
.SUNDAY...Northeast winds 10 to 15 knots. Seas 2 to 3 feet.
Scattered showers in the afternoon.
.SUNDAY NIGHT...Northeast winds 10 to 15 knots. Seas 2 to 3 feet.
.MONDAY...Northeast winds 10 to 15 knots. Seas 2 to 3 feet.
.MONDAY NIGHT...Northeast winds 10 to 15 knots. Seas 2 to 3 feet.
Scattered showers.

Winds and seas higher in and near thunderstorms.

$$

AMZ745-202045-
Coastal Waters of Southwestern Puerto Rico out 10 NM-
407 AM AST Thu Nov 20 2025

.TODAY...East winds around 5 knots. Seas 2 to 3 feet. Wave Detail:
Northwest 2 feet at 9 seconds and southeast 1 foot at 6 seconds.
Showers with isolated thunderstorms this afternoon.
.TONIGHT...Northeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Northwest 3 feet at 10 seconds and east 2 feet at 5 seconds.
Numerous showers in the evening.
.FRIDAY...Northeast winds 5 to 10 knots, diminishing to around
5 knots in the afternoon. Seas 2 to 3 feet. Wave Detail: Northwest
2 feet at 9 seconds and east 1 foot at 5 seconds. Scattered showers
in the afternoon.
.FRIDAY NIGHT...Northeast winds 10 to 15 knots with gusts up to
20 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at
6 seconds and north 2 feet at 8 seconds. Scattered showers in the
evening.
.SATURDAY...Northeast winds 5 to 10 knots, diminishing to around
5 knots in the afternoon. Seas 2 to 3 feet. Wave Detail: East 2 feet
at 6 seconds and north 2 feet at 7 seconds. Scattered showers in the
afternoon.
.SATURDAY NIGHT...Northeast winds 10 to 15 knots, diminishing to
5 to 10 knots after midnight. Seas 2 to 3 feet. Wave Detail: North
2 feet at 7 seconds and east 1 foot at 5 seconds.
.SUNDAY...Northeast winds 5 to 10 knots, diminishing to around
5 knots in the afternoon. Seas around 2 feet. Scattered showers in
the afternoon.
.SUNDAY NIGHT...Northeast winds 5 to 10 knots. Seas around 2 feet.
.MONDAY...East winds 5 to 10 knots, diminishing to around 5 knots in
the afternoon. Seas around 2 feet.
.MONDAY NIGHT...Northeast winds 5 to 10 knots. Seas around 2 feet.

Winds and seas higher in and near thunderstorms.

$$