National Weather Service Marine Forecast FZCA52 TJSJ
FZCA52 TJSJ 110818
CWFSJU
Coastal Waters Forecast
National Weather Service San Juan PR
418 AM AST Thu Dec 11 2025
Puerto Rico and the U.S. Virgin Islands Waters
AMZ700-112130
418 AM AST Thu Dec 11 2025
SYNOPSIS FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS WATERS
A surface high pressure will continue to build near the Azores through the weekend. A weak cold front and another surface high pressure will move from the western Atlantic into the central Atlantic during the next few days. This will promote moderate to locally fresh east to southeast trades across the local waters. Increasing winds and a long period northerly swell will cause choppy to rough seas, mostly over the Atlantic offshore waters. Small Craft Advisory (SCA) conditions are expected across these waters, however, SCA conditions can spread into portions of the Anegada and Caribbean waters later this weekend.
AMZ711-112130
Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N
418 AM AST Thu Dec 11 2025
SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY AFTERNOON
TODAY
Southeast winds 15 to 20 knots, diminishing to 10 to
15 knots this afternoon. Seas 5 to 8 feet. Wave Detail: East 5 feet
at 7 seconds and north 4 feet at 13 seconds. Scattered showers early
this morning, then isolated showers late this morning and afternoon.
TONIGHT
East winds 10 to 15 knots with gusts up to 25 knots. Seas
6 to 7 feet. Wave Detail: East 5 feet at 8 seconds and north 4 feet
at 11 seconds.
FRIDAY
East winds 15 to 20 knots with gusts up to 25 knots. Seas
6 to 7 feet. Wave Detail: East 6 feet at 9 seconds and north 4 feet
at 13 seconds.
FRIDAY NIGHT
East winds 15 to 20 knots with gusts up to 25 knots.
Seas 5 to 7 feet. Wave Detail: East 6 feet at 8 seconds and north
3 feet at 13 seconds. Scattered showers.
SATURDAY
East winds 15 to 20 knots with gusts up to 30 knots.
Seas 6 to 7 feet. Wave Detail: East 6 feet at 9 seconds and north
3 feet at 13 seconds. Numerous showers, mainly in the morning.
SATURDAY NIGHT
East winds 15 to 20 knots with gusts up to
30 knots. Seas 6 to 7 feet. Wave Detail: East 6 feet at 9 seconds
and northwest 2 feet at 11 seconds. Numerous showers.
SUNDAY
East winds 15 to 20 knots. Seas 5 to 7 feet. Scattered
showers in the morning.
SUNDAY NIGHT
East winds 15 to 20 knots, becoming southeast 10 to
15 knots after midnight. Seas 5 to 7 feet. Scattered showers.
MONDAY
Southeast winds 5 to 10 knots. Seas 5 to 7 feet. Scattered
showers in the morning.
MONDAY NIGHT
East winds 5 to 10 knots. Seas 4 to 6 feet.
AMZ712-112130
Coastal Waters of Northern Puerto Rico out 10 NM
418 AM AST Thu Dec 11 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 7 seconds and north 3 feet
at 13 seconds. Scattered showers early this morning. Isolated
showers this afternoon.
TONIGHT
East winds 10 to 15 knots with gusts up to 20 knots. Seas
5 to 6 feet. Wave Detail: East 4 feet at 7 seconds and north 4 feet
at 12 seconds.
FRIDAY
East winds 10 to 15 knots with gusts up to 25 knots. Seas
5 to 6 feet. Wave Detail: East 5 feet at 7 seconds and north 4 feet
at 11 seconds.
FRIDAY NIGHT
East winds 10 to 15 knots with gusts up to 25 knots.
Seas 5 to 6 feet. Wave Detail: East 5 feet at 8 seconds and
northeast 3 feet at 13 seconds. Scattered showers.
SATURDAY
East winds 10 to 15 knots, increasing to 15 to 20 knots
in the afternoon. Gusts up to 30 knots. Seas 5 to 6 feet. Wave
Detail: East 5 feet at 6 seconds and north 3 feet at 13 seconds.
Scattered showers in the morning.
SATURDAY NIGHT
East winds 15 to 20 knots with gusts up to
30 knots, diminishing to 10 to 15 knots with gusts up to 20 knots
after midnight. Seas around 5 feet. Wave Detail: East 5 feet at
6 seconds and northeast 3 feet at 13 seconds. Numerous showers.
SUNDAY
East winds 10 to 15 knots. Seas 4 to 5 feet. Scattered
showers in the afternoon.
SUNDAY NIGHT
Southeast winds 10 to 15 knots, diminishing to 5 to
10 knots after midnight. Seas 4 to 5 feet. Scattered showers.
MONDAY
Southeast winds around 5 knots, becoming east in the
afternoon. Seas 4 to 5 feet. Scattered showers in the morning.
MONDAY NIGHT
East winds 5 to 10 knots. Seas around 4 feet.
AMZ716-112130
Coastal Waters from Cabo San Juan to the waters between Anegada
Island and Virgin Gorda and North 10 NM
418 AM AST Thu Dec 11 2025
SMALL CRAFT SHOULD EXERCISE CAUTION
TODAY
Southeast winds 15 to 20 knots with gusts up to 25 knots.
Seas 4 to 6 feet. Wave Detail: Southeast 5 feet at 6 seconds and
north 2 feet at 13 seconds. Scattered showers early this morning,
then isolated showers late this morning and afternoon.
TONIGHT
East winds around 15 knots with gusts up to 25 knots.
Seas 4 to 6 feet. Wave Detail: East 4 feet at 6 seconds and north
4 feet at 12 seconds. Scattered showers in the evening.
FRIDAY
East winds 15 to 20 knots with gusts up to 25 knots. Seas
4 to 6 feet. Wave Detail: East 4 feet at 5 seconds and north 4 feet
at 11 seconds.
FRIDAY NIGHT
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. Numerous showers.
SATURDAY
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 12 seconds. Numerous showers, mainly in the morning.
SATURDAY 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
and north 3 feet at 13 seconds. Numerous showers.
SUNDAY
East winds 15 to 20 knots. Seas 4 to 5 feet. Scattered
showers in the morning.
SUNDAY NIGHT
East winds 10 to 15 knots. Seas 4 to 5 feet.
Scattered showers.
MONDAY
Southeast winds 5 to 10 knots. Seas 3 to 4 feet. Scattered
showers in the morning.
MONDAY NIGHT
East winds 5 to 10 knots. Seas 3 to 4 feet.
Scattered showers.
AMZ723-112130
Anegada Passage east of Virgin Gorda and Saint Croix south to 17N
418 AM AST Thu Dec 11 2025
SMALL CRAFT SHOULD EXERCISE CAUTION
TODAY
East winds 15 to 20 knots with gusts up to 25 knots. Seas
around 6 feet. Wave Detail: East 6 feet at 7 seconds and north
2 feet at 13 seconds. Scattered showers late this morning. Isolated
showers early this afternoon, then scattered showers late.
TONIGHT
East winds 15 to 20 knots with gusts up to 25 knots. Seas
5 to 6 feet. Wave Detail: East 5 feet at 6 seconds and north 2 feet
at 14 seconds.
FRIDAY
East winds 15 to 20 knots with gusts up to 25 knots. Seas
around 6 feet. Wave Detail: East 5 feet at 6 seconds and north
3 feet at 13 seconds.
FRIDAY NIGHT
East winds 15 to 20 knots with gusts up to 25 knots.
Seas around 6 feet. Wave Detail: East 6 feet at 6 seconds and north
3 feet at 13 seconds. Scattered showers.
SATURDAY
East winds 15 to 20 knots with gusts up to 25 knots.
Seas around 6 feet. Wave Detail: East 6 feet at 7 seconds and north
3 feet at 13 seconds. Scattered showers in the afternoon.
SATURDAY NIGHT
East winds 15 to 20 knots with gusts up to
25 knots. Seas around 6 feet. Wave Detail: East 6 feet at 7 seconds
and north 2 feet at 13 seconds.
SUNDAY
East winds 15 to 20 knots. Seas 5 to 6 feet.
SUNDAY NIGHT
East winds 10 to 15 knots. Seas 5 to 6 feet.
MONDAY
East winds 10 to 15 knots, diminishing to 5 to 10 knots in
the afternoon. Seas 4 to 5 feet.
MONDAY NIGHT
East winds 5 to 10 knots. Seas 4 to 5 feet.
Scattered showers.
AMZ726-112130
Coastal waters east of Puerto Rico, around Vieques, and around and
just north of Culebra and Saint John
418 AM AST Thu Dec 11 2025
SMALL CRAFT SHOULD EXERCISE CAUTION
TODAY
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 early this morning, then isolated showers late this morning.
Scattered showers this afternoon.
TONIGHT
East winds 10 to 15 knots with gusts up to 25 knots. Seas
4 to 5 feet. Wave Detail: East 4 feet at 7 seconds. Scattered
showers.
FRIDAY
East winds 15 to 20 knots with gusts up to 25 knots. Seas
4 to 6 feet. Wave Detail: East 5 feet at 7 seconds.
FRIDAY NIGHT
East winds 15 to 20 knots with gusts up to 25 knots.
Seas 5 to 6 feet. Wave Detail: East 5 feet at 7 seconds. Numerous
showers.
SATURDAY
East winds 15 to 20 knots with gusts up to 25 knots.
Seas 4 to 6 feet. Wave Detail: East 5 feet at 7 seconds. Numerous
showers in the morning.
SATURDAY NIGHT
East winds around 15 knots with gusts up to
25 knots. Seas 4 to 5 feet. Wave Detail: East 5 feet at 7 seconds.
Numerous showers.
SUNDAY
East winds 15 to 20 knots. Seas 4 to 5 feet. Scattered
showers in the morning.
SUNDAY NIGHT
East winds 10 to 15 knots. Seas 3 to 5 feet.
Scattered showers.
MONDAY
Southeast winds 5 to 10 knots. Seas 3 to 5 feet. Scattered
showers.
MONDAY NIGHT
East winds 5 to 10 knots. Seas 3 to 4 feet.
Scattered showers.
AMZ733-112130
Caribbean waters of Puerto Rico from 10 NM to 17N, including the
coastal waters of Saint Croix
418 AM AST Thu Dec 11 2025
SMALL CRAFT SHOULD EXERCISE CAUTION
TODAY
East winds 15 to 20 knots with gusts up to 25 knots. Seas
5 to 6 feet. Wave Detail: East 5 feet at 7 seconds. Scattered
showers this morning, then numerous showers this afternoon.
TONIGHT
East winds 15 to 20 knots with gusts up to 25 knots. Seas
5 to 6 feet. Wave Detail: East 5 feet at 7 seconds. Numerous
showers, mainly in the evening.
FRIDAY
East winds 15 to 20 knots with gusts up to 25 knots. Seas
5 to 6 feet. Wave Detail: East 5 feet at 7 seconds. Scattered
showers in the morning.
FRIDAY NIGHT
East winds 15 to 20 knots with gusts up to 25 knots.
Seas 5 to 6 feet. Wave Detail: East 5 feet at 7 seconds. Scattered
showers.
SATURDAY
East winds 15 to 20 knots with gusts up to 25 knots.
Seas 5 to 6 feet. Wave Detail: East 6 feet at 7 seconds. Scattered
showers in the morning.
SATURDAY NIGHT
East winds 15 to 20 knots with gusts up to
25 knots. Seas 5 to 6 feet. Wave Detail: East 6 feet at 7 seconds.
SUNDAY
East winds 15 to 20 knots. Seas 5 to 6 feet.
SUNDAY NIGHT
East winds 15 to 20 knots, diminishing to 10 to
15 knots after midnight. Seas around 5 feet.
MONDAY
East winds 5 to 10 knots. Seas 4 to 5 feet.
MONDAY NIGHT
East winds 5 to 10 knots. Seas around 4 feet.
Scattered showers.
AMZ735-112130
Coastal Waters of Southern Puerto Rico out 10 NM
418 AM AST Thu Dec 11 2025
TODAY
East winds 10 to 15 knots with gusts up to 25 knots. Seas
3 to 5 feet. Wave Detail: Southeast 4 feet at 6 seconds. Isolated
showers until late afternoon, then numerous showers late.
TONIGHT
East winds 10 to 15 knots with gusts up to 20 knots. Seas
3 to 5 feet. Wave Detail: East 4 feet at 7 seconds. Scattered
showers.
FRIDAY
East winds 15 to 20 knots with gusts up to 25 knots. Seas
3 to 5 feet. Wave Detail: East 4 feet at 7 seconds.
FRIDAY NIGHT
East winds 10 to 15 knots with gusts up to 25 knots.
Seas 4 to 5 feet. Wave Detail: East 4 feet at 7 seconds.
SATURDAY
East winds 15 to 20 knots with gusts up to 30 knots.
Seas 4 to 5 feet. Wave Detail: East 5 feet at 7 seconds.
SATURDAY NIGHT
East winds 15 to 20 knots, diminishing to 10 to
15 knots after midnight. Gusts up to 30 knots. Seas 3 to 5 feet.
Wave Detail: East 5 feet at 7 seconds. Numerous showers.
SUNDAY
East winds 10 to 15 knots. Seas 3 to 5 feet.
SUNDAY NIGHT
East winds 10 to 15 knots. Seas 3 to 5 feet.
MONDAY
East winds 5 to 10 knots. Seas 3 to 4 feet.
MONDAY NIGHT
East winds 5 to 10 knots. Seas 2 to 4 feet.
AMZ741-112130
Mona Passage Southward to 17N
418 AM AST Thu Dec 11 2025
SMALL CRAFT SHOULD EXERCISE CAUTION
TODAY
East winds 15 to 20 knots, diminishing to 10 to 15 knots
late. Seas 4 to 5 feet. Wave Detail: Southeast 5 feet at 6 seconds
and north 2 feet at 13 seconds. Isolated showers.
TONIGHT
East winds 10 to 15 knots with gusts up to 20 knots. Seas
5 to 6 feet. Wave Detail: East 5 feet at 7 seconds and north 4 feet
at 12 seconds. Scattered showers in the evening, then numerous
showers after midnight.
FRIDAY
East winds 15 to 20 knots with gusts up to 25 knots. Seas
5 to 6 feet. Wave Detail: East 5 feet at 7 seconds and north 4 feet
at 11 seconds. Scattered showers in the morning.
FRIDAY NIGHT
East winds 15 to 20 knots with gusts up to 25 knots.
Seas 5 to 6 feet. Wave Detail: East 5 feet at 7 seconds and north
3 feet at 11 seconds.
SATURDAY
East winds 15 to 20 knots with gusts up to 30 knots.
Seas 5 to 6 feet. Wave Detail: East 6 feet at 7 seconds and north
3 feet at 12 seconds.
SATURDAY NIGHT
East winds 15 to 20 knots with gusts up to
30 knots. Seas 5 to 7 feet. Wave Detail: East 6 feet at 7 seconds
and northeast 3 feet at 13 seconds.
SUNDAY
East winds 15 to 20 knots. Seas 4 to 6 feet. Scattered
showers in the afternoon.
SUNDAY NIGHT
East winds 15 to 20 knots, diminishing to 10 to
15 knots after midnight. Seas 4 to 6 feet. Scattered showers.
MONDAY
East winds 5 to 10 knots. Seas 4 to 5 feet.
MONDAY NIGHT
East winds 5 to 10 knots. Seas 4 to 5 feet.
Scattered showers.
AMZ742-112130
Coastal Waters of Northwestern Puerto Rico out 10 NM
418 AM AST Thu Dec 11 2025
TODAY
East winds 5 to 10 knots, becoming southeast late this
morning and early afternoon, then becoming east late. Seas 2 to
4 feet. Wave Detail: East 2 feet at 6 seconds and north 2 feet at
13 seconds. Scattered showers late.
TONIGHT
East winds 5 to 10 knots. Seas 3 to 5 feet. Wave Detail:
North 3 feet at 12 seconds and southeast 2 feet at 6 seconds.
FRIDAY
East winds 5 to 10 knots. Seas 3 to 5 feet. Wave Detail:
Southeast 2 feet at 7 seconds. Scattered showers in the afternoon.
FRIDAY NIGHT
East winds 5 to 10 knots with gusts up to 20 knots.
Seas 2 to 4 feet. Wave Detail: East 4 feet at 7 seconds and north
4 feet at 10 seconds.
SATURDAY
East winds 10 to 15 knots, increasing to 15 to 20 knots
in the afternoon. Gusts up to 30 knots. Seas 2 to 4 feet. Wave
Detail: North 3 feet at 7 seconds and north 3 feet at 12 seconds.
Scattered showers in the afternoon.
SATURDAY NIGHT
East winds 15 to 20 knots with gusts up to
30 knots, diminishing to 10 to 15 knots with gusts up to 20 knots
after midnight. Seas 2 to 4 feet. Wave Detail: Northeast 4 feet at
5 seconds and north 3 feet at 13 seconds.
SUNDAY
East winds 5 to 10 knots, diminishing to around 5 knots in
the afternoon. Seas 2 to 4 feet. Scattered showers in the afternoon.
SUNDAY NIGHT
Southeast winds 5 to 10 knots. Seas 2 to 4 feet.
MONDAY
East winds around 5 knots, becoming northeast in the
afternoon. Seas 2 to 3 feet. Scattered showers in the afternoon.
MONDAY NIGHT
East winds around 5 knots. Seas 2 to 3 feet.
Scattered showers.
AMZ745-112130
Coastal Waters of Southwestern Puerto Rico out 10 NM
418 AM AST Thu Dec 11 2025
TODAY
East winds 5 to 10 knots, becoming southeast 10 to 15 knots
late this morning and afternoon. Gusts up to 25 knots. Seas 2 to
3 feet. Wave Detail: Southeast 3 feet at 6 seconds and northwest
1 foot at 10 seconds. Isolated showers late.
TONIGHT
East winds 5 to 10 knots. Seas 2 to 4 feet. Wave Detail:
Southeast 3 feet at 6 seconds and northwest 3 feet at 12 seconds.
Scattered showers in the evening.
FRIDAY
East winds 10 to 15 knots with gusts up to 25 knots. Seas
2 to 4 feet. Wave Detail: Southeast 3 feet at 6 seconds and
northwest 3 feet at 11 seconds.
FRIDAY NIGHT
East winds 10 to 15 knots with gusts up to 25 knots,
diminishing to 5 to 10 knots after midnight. Seas 2 to 4 feet. Wave
Detail: Southeast 3 feet at 6 seconds and northwest 2 feet at
10 seconds.
SATURDAY
East winds 10 to 15 knots with gusts up to 20 knots,
increasing to 15 to 20 knots with gusts up to 30 knots in the
afternoon. Seas 2 to 4 feet. Wave Detail: Southeast 3 feet at
6 seconds and northwest 2 feet at 10 seconds. Scattered showers in
the afternoon.
SATURDAY NIGHT
East winds 15 to 20 knots with gusts up to
30 knots, diminishing to 5 to 10 knots after midnight. Seas 2 to
4 feet. Wave Detail: East 3 feet at 5 seconds and northwest 2 feet
at 10 seconds.
SUNDAY
East winds 5 to 10 knots, becoming southeast 15 to
20 knots in the afternoon. Seas 2 to 4 feet.
SUNDAY NIGHT
East winds 10 to 15 knots. Seas 2 to 4 feet.
MONDAY
East winds 5 to 10 knots. Seas 2 to 3 feet.
MONDAY NIGHT
East winds around 5 knots. Seas 2 to 3 feet.
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