National Weather Service Marine Forecast FZCA52 TJSJ
FZCA52 TJSJ 100757
CWFSJU
Coastal Waters Forecast
National Weather Service San Juan PR
357 AM AST Fri Jul 10 2026
Puerto Rico and the U.S. Virgin Islands Waters
Seas are provided as a range of the average height of the highest 1/3 of the waves...along with the occasional height of the average highest 10 percent of the waves.
AMZ700-102200
357 AM AST Fri Jul 10 2026
Synopsis for Puerto Rico and the U.S. Virgin Islands Waters
A broad surface high pressure centered over the Atlantic will continue to support moderate to fresh easterly winds, occasionally strong, across the regional waters through at least late tonight. These conditions will maintain choppy to hazardous seas, with wave heights generally ranging from 5 to 7 feet across the offshore Atlantic waters, Caribbean waters, and the Mona Passage. Small Craft Advisories remain in effect for these waters through at least midnight tonight. Meanwhile, a drier air mass combined with moderate to high concentrations of Saharan dust will persist through the weekend, promoting hazy skies and periods of reduced visibility across the region.
AMZ711-102200
Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N
357 AM AST Fri Jul 10 2026
SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING
TODAY
East winds 15 to 20 knots with gusts up to 30 knots. Seas 4
to 7 feet, occasionally to 8 feet. Wave Detail: East 6 feet at 7
seconds.
TONIGHT
East winds 15 to 20 knots with gusts up to 30 knots. Seas
4 to 7 feet, occasionally to 8 feet. Wave Detail: East 5 feet at 7
seconds.
SATURDAY
East winds 15 to 20 knots with gusts up to 30 knots.
Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: East 5 feet
at 7 seconds.
SATURDAY NIGHT
East winds 15 to 20 knots with gusts up to
30 knots. Seas around 5 feet, occasionally to 6 feet. Wave Detail:
East 5 feet at 8 seconds and north 1 foot at 9 seconds.
SUNDAY
East winds 15 to 20 knots with gusts up to 30 knots. Seas
4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at
7 seconds and north 1 foot at 9 seconds.
SUNDAY NIGHT
East winds 15 to 20 knots with gusts up to 30 knots.
Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet
at 8 seconds and north 1 foot at 8 seconds.
MONDAY
East winds 15 to 20 knots. Seas 4 to 5 feet, occasionally
to 6 feet.
MONDAY NIGHT
East winds 15 to 20 knots. Seas 4 to 5 feet,
occasionally to 6 feet.
TUESDAY
East winds 15 to 20 knots. Seas 4 to 5 feet, occasionally
to 6 feet.
TUESDAY NIGHT
East winds around 15 knots. Seas 4 to 5 feet,
occasionally to 6 feet.
AMZ712-102200
Coastal Waters of Northern Puerto Rico out 10 NM
357 AM AST Fri Jul 10 2026
SMALL CRAFT SHOULD EXERCISE CAUTION
TODAY
East winds around 15 knots, becoming northeast late this
morning, then becoming east 20 to 25 knots this afternoon. Seas 5 to
6 feet, occasionally to 8 feet. Wave Detail: Northeast 6 feet at
7 seconds.
TONIGHT
East winds 15 to 20 knots with gusts up to 30 knots. Seas
4 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at
7 seconds.
SATURDAY
East winds 15 to 20 knots with gusts up to 30 knots.
Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet
at 7 seconds.
SATURDAY NIGHT
East winds 15 to 20 knots with gusts up to
30 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail:
East 5 feet at 6 seconds.
SUNDAY
East winds 15 to 20 knots with gusts up to 30 knots. Seas
4 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast 5 feet
at 6 seconds and north 1 foot at 9 seconds.
SUNDAY NIGHT
East winds 15 to 20 knots, diminishing to 10 to
15 knots after midnight. Gusts up to 30 knots. Seas 4 to 5 feet,
occasionally to 6 feet. Wave Detail: East 5 feet at 6 seconds and
north 1 foot at 10 seconds.
MONDAY
East winds 10 to 15 knots, increasing to 15 to 20 knots in
the afternoon. Seas 3 to 5 feet, occasionally to 6 feet. Scattered
showers.
MONDAY NIGHT
East winds 15 to 20 knots, diminishing to 10 to
15 knots after midnight. Seas 3 to 5 feet, occasionally to 6 feet.
TUESDAY
East winds 15 to 20 knots. Seas 3 to 5 feet, occasionally
to 6 feet.
TUESDAY NIGHT
East winds 10 to 15 knots. Seas 3 to 5 feet,
occasionally to 6 feet.
AMZ716-102200
Coastal Waters from Cabo San Juan to the waters between Anegada
Island and Virgin Gorda and North 10 NM
357 AM AST Fri Jul 10 2026
SMALL CRAFT SHOULD EXERCISE CAUTION
TODAY
East winds 15 to 20 knots with gusts up to 30 knots. Seas
4 to 6 feet, occasionally to 8 feet. Wave Detail: East 5 feet at
6 seconds.
TONIGHT
East winds 15 to 20 knots with gusts up to 30 knots. Seas
3 to 5 feet, occasionally to 6 feet. Wave Detail: East 4 feet at
6 seconds.
SATURDAY
East winds 15 to 20 knots with gusts up to 25 knots.
Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: East 4 feet
at 6 seconds.
SATURDAY NIGHT
East winds 15 to 20 knots with gusts up to
30 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail:
East 4 feet at 5 seconds.
SUNDAY
East winds 15 to 20 knots with gusts up to 30 knots. Seas
3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at
5 seconds and north 1 foot at 9 seconds.
SUNDAY NIGHT
East winds 15 to 20 knots with gusts up to 30 knots.
Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet
at 5 seconds and north 1 foot at 9 seconds.
MONDAY
East winds 15 to 20 knots. Seas 3 to 4 feet, occasionally
to 5 feet. Scattered showers in the morning.
MONDAY NIGHT
East winds around 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet.
TUESDAY
East winds around 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Scattered showers in the morning.
TUESDAY NIGHT
East winds around 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet.
AMZ723-102200
Anegada Passage east of Virgin Gorda and Saint Croix south to 17N
357 AM AST Fri Jul 10 2026
SMALL CRAFT SHOULD EXERCISE CAUTION
TODAY
East winds 15 to 20 knots with gusts up to 30 knots. Seas
around 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at
7 seconds and northeast 1 foot at 10 seconds.
TONIGHT
East winds 15 to 20 knots with gusts up to 30 knots. Seas
5 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at
6 seconds.
SATURDAY
East winds 15 to 20 knots with gusts up to 30 knots.
Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet
at 7 seconds.
SATURDAY NIGHT
East winds 15 to 20 knots with gusts up to
30 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail:
East 5 feet at 6 seconds.
SUNDAY
East winds 15 to 20 knots with gusts up to 25 knots. Seas
4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at
6 seconds.
SUNDAY NIGHT
East winds 15 to 20 knots with gusts up to 25 knots.
Seas around 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet
at 6 seconds and northeast 1 foot at 11 seconds.
MONDAY
East winds 15 to 20 knots. Seas around 4 feet,
occasionally to 5 feet. Scattered showers in the morning.
MONDAY NIGHT
East winds around 15 knots. Seas around 4 feet,
occasionally to 5 feet.
TUESDAY
East winds around 15 knots. Seas around 4 feet,
occasionally to 5 feet.
TUESDAY NIGHT
East winds around 15 knots. Seas around 4 feet,
occasionally to 5 feet.
AMZ726-102200
Coastal waters east of Puerto Rico, around Vieques, and around and
just north of Culebra and Saint John
357 AM AST Fri Jul 10 2026
SMALL CRAFT SHOULD EXERCISE CAUTION
TODAY
East winds 15 to 20 knots with gusts up to 30 knots. Seas
4 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at
7 seconds.
TONIGHT
East winds 15 to 20 knots with gusts up to 30 knots. Seas
4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at
7 seconds.
SATURDAY
East winds 15 to 20 knots with gusts up to 25 knots.
Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet
at 6 seconds.
SATURDAY NIGHT
East winds 15 to 20 knots with gusts up to
30 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail:
East 5 feet at 7 seconds.
SUNDAY
East winds 15 to 20 knots with gusts up to 25 knots. Seas
3 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at
6 seconds.
SUNDAY NIGHT
East winds 15 to 20 knots with gusts up to 30 knots.
Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet
at 6 seconds.
MONDAY
East winds 15 to 20 knots. Seas 3 to 4 feet, occasionally
to 5 feet. Scattered showers in the morning.
MONDAY NIGHT
East winds around 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Scattered showers.
TUESDAY
East winds around 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet.
TUESDAY NIGHT
East winds around 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet.
AMZ733-102200
Caribbean waters of Puerto Rico from 10 NM to 17N, including the
coastal waters of Saint Croix
357 AM AST Fri Jul 10 2026
SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING
TODAY
East winds 15 to 20 knots with gusts up to 30 knots. Seas
6 to 7 feet, occasionally to 9 feet. Wave Detail: East 6 feet at
7 seconds.
TONIGHT
East winds 15 to 20 knots with gusts up to 30 knots. Seas
5 to 7 feet, occasionally to 9 feet. Wave Detail: East 6 feet at
7 seconds.
SATURDAY
East winds 15 to 20 knots with gusts up to 30 knots.
Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet
at 7 seconds.
SATURDAY NIGHT
East winds 15 to 20 knots with gusts up to
30 knots. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail:
East 6 feet at 7 seconds.
SUNDAY
East winds 15 to 20 knots with gusts up to 30 knots. Seas
4 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at
7 seconds.
SUNDAY NIGHT
East winds 15 to 20 knots with gusts up to 30 knots.
Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet
at 7 seconds.
MONDAY
East winds 15 to 20 knots. Seas 4 to 5 feet, occasionally
to 6 feet. Scattered showers in the morning.
MONDAY NIGHT
East winds 15 to 20 knots. Seas 4 to 5 feet,
occasionally to 6 feet. Scattered showers.
TUESDAY
East winds 15 to 20 knots. Seas 4 to 5 feet, occasionally
to 6 feet.
TUESDAY NIGHT
East winds 15 to 20 knots. Seas 4 to 5 feet,
occasionally to 6 feet.
AMZ735-102200
Coastal Waters of Southern Puerto Rico out 10 NM
357 AM AST Fri Jul 10 2026
SMALL CRAFT SHOULD EXERCISE CAUTION
TODAY
East winds 15 to 20 knots, increasing to 20 to 25 knots
early this afternoon, then diminishing to 15 to 20 knots late. Seas
4 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at 7
seconds.
TONIGHT
East winds 15 to 20 knots with gusts up to 30 knots. Seas
4 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at
7 seconds.
SATURDAY
East winds 15 to 20 knots with gusts up to 30 knots.
Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: East 5 feet
at 7 seconds.
SATURDAY NIGHT
East winds 15 to 20 knots with gusts up to
30 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail:
East 5 feet at 7 seconds.
SUNDAY
East winds 10 to 15 knots with gusts up to 25 knots. Seas
3 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at
7 seconds.
SUNDAY NIGHT
East winds 10 to 15 knots with gusts up to 25 knots.
Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet
at 7 seconds.
MONDAY
East winds 15 to 20 knots. Seas 3 to 5 feet, occasionally
to 6 feet. Scattered showers in the afternoon.
MONDAY NIGHT
East winds 10 to 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Scattered showers.
TUESDAY
East winds 15 to 20 knots. Seas 3 to 4 feet, occasionally
to 5 feet.
TUESDAY NIGHT
East winds 10 to 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet.
AMZ741-102200
Mona Passage Southward to 17N
357 AM AST Fri Jul 10 2026
SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING
TODAY
East winds 15 to 20 knots with gusts up to 30 knots. Seas
5 to 7 feet, occasionally to 9 feet. Wave Detail: East 7 feet at
7 seconds. Isolated showers late.
TONIGHT
East winds 15 to 20 knots with gusts up to 30 knots. Seas
5 to 7 feet, occasionally to 9 feet. Wave Detail: East 6 feet at
7 seconds.
SATURDAY
East winds 15 to 20 knots with gusts up to 30 knots.
Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet
at 7 seconds.
SATURDAY NIGHT
East winds 15 to 20 knots with gusts up to
30 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail:
East 7 feet at 7 seconds.
SUNDAY
East winds 15 to 20 knots with gusts up to 30 knots. Seas
4 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at
7 seconds.
SUNDAY NIGHT
East winds 15 to 20 knots with gusts up to 30 knots.
Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet
at 7 seconds and north 1 foot at 9 seconds. Scattered showers in the
evening.
MONDAY
East winds 15 to 20 knots. Seas 3 to 5 feet, occasionally
to 6 feet. Scattered showers.
MONDAY NIGHT
East winds 10 to 15 knots, increasing to 15 to
20 knots after midnight. Seas 4 to 5 feet, occasionally to 6 feet.
Scattered showers.
TUESDAY
East winds 15 to 20 knots. Seas 3 to 5 feet, occasionally
to 6 feet.
TUESDAY NIGHT
East winds 15 to 20 knots. Seas 4 to 5 feet,
occasionally to 6 feet.
AMZ742-102200
Coastal Waters of Northwestern Puerto Rico out 10 NM
357 AM AST Fri Jul 10 2026
SMALL CRAFT SHOULD EXERCISE CAUTION
TODAY
East winds 5 to 10 knots, becoming northeast 15 to
20 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail:
Northeast 4 feet at 7 seconds. Isolated showers this afternoon.
TONIGHT
East winds 15 to 20 knots, diminishing to 10 to 15 knots
after midnight. Gusts up to 30 knots. Seas 3 to 5 feet, occasionally
to 6 feet. Wave Detail: Northeast 4 feet at 6 seconds.
SATURDAY
East winds 5 to 10 knots with gusts up to 20 knots,
becoming northeast 10 to 15 knots with gusts up to 30 knots in the
afternoon. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail:
Northeast 4 feet at 7 seconds.
SATURDAY NIGHT
East winds 15 to 20 knots with gusts up to
30 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail:
Northeast 4 feet at 6 seconds.
SUNDAY
East winds 10 to 15 knots with gusts up to 25 knots. Seas
2 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast 3 feet
at 6 seconds. Scattered showers in the afternoon.
SUNDAY NIGHT
East winds 15 to 20 knots, diminishing to 10 to
15 knots after midnight. Seas 2 to 4 feet, occasionally to 5 feet.
Wave Detail: Northeast 4 feet at 6 seconds. Scattered showers in the
evening.
MONDAY
East winds 5 to 10 knots, becoming northeast 10 to
15 knots in the afternoon. Seas 2 to 3 feet. Numerous showers in the
afternoon.
MONDAY NIGHT
East winds 10 to 15 knots, diminishing to 5 to
10 knots after midnight. Seas 2 to 4 feet, occasionally to 5 feet.
TUESDAY
Northeast winds 5 to 10 knots. Seas 2 to 3 feet.
Scattered showers in the afternoon.
TUESDAY NIGHT
East winds 5 to 10 knots, increasing to 10 to
15 knots after midnight. Seas 2 to 4 feet, occasionally to 5 feet.
AMZ745-102200
Coastal Waters of Southwestern Puerto Rico out 10 NM
357 AM AST Fri Jul 10 2026
SMALL CRAFT SHOULD EXERCISE CAUTION
TODAY
East winds 10 to 15 knots with gusts up to 25 knots,
becoming southeast 15 to 20 knots with gusts up to 30 knots early
this afternoon, then diminishing to 10 to 15 knots with gusts up to
25 knots late. Seas 2 to 4 feet, occasionally to 5 feet. Wave
Detail: East 3 feet at 7 seconds. Isolated showers late.
TONIGHT
East winds 10 to 15 knots with gusts up to 20 knots,
becoming northeast 5 to 10 knots after midnight. Seas 2 to 4 feet,
occasionally to 5 feet. Wave Detail: East 3 feet at 7 seconds.
SATURDAY
Northeast winds around 5 knots, becoming southeast in
the afternoon. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at
7 seconds.
SATURDAY NIGHT
East winds 5 to 10 knots with gusts up to
20 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 7 seconds.
SUNDAY
East winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail:
Southeast 2 feet at 7 seconds and north 1 foot at 4 seconds.
Scattered showers in the afternoon.
SUNDAY NIGHT
East winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: East 2 feet at 7 seconds and north 1 foot at 6 seconds.
MONDAY
East winds 5 to 10 knots, becoming southeast 10 to
15 knots in the afternoon. Seas 2 to 3 feet. Scattered showers in
the afternoon.
MONDAY NIGHT
East winds 10 to 15 knots, diminishing to 5 to
10 knots after midnight. Seas 2 to 3 feet.
TUESDAY
East winds 10 to 15 knots, becoming southeast 15 to
20 knots in the afternoon. Seas 2 to 3 feet.
TUESDAY NIGHT
East winds 10 to 15 knots, diminishing to 5 to
10 knots after midnight. Seas 2 to 3 feet.
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