National Weather Service Marine Forecast FZCA52 TJSJ

FZCA52 TJSJ 031938
CWFSJU

Coastal Waters Forecast
National Weather Service San Juan PR
338 PM AST Sat Oct 3 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.

AMZ700-040815
338 PM AST Sat Oct 3 2026

Synopsis for Puerto Rico and the U.S. Virgin Islands Waters

Surface high will shift toward the east on Sunday, relaxing the pressure gradient a little. As a result, winds will become light to moderate and seas will gradually subside. Easterly trade winds are expected to strengthen again by Tuesday into Wednesday as another surface high builds across the western Atlantic, resulting in increasingly choppy marine conditions. A tropical wave will move over the Caribbean Sea late Wednesday into Thursday, increasing the potential for showers and thunderstorms.

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AMZ711-040815
Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N
338 PM AST Sat Oct 3 2026

TONIGHT
East winds 10 to 15 knots with gusts up to 25 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 4 feet at 6 seconds and northeast 3 feet at 11 seconds. Scattered showers.

SUNDAY
East winds 10 to 15 knots with gusts up to 20 knots. Seas around 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 6 seconds and northeast 2 feet at 11 seconds. Scattered showers.

SUNDAY NIGHT
East winds 10 to 15 knots with gusts up to 20 knots. Seas around 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 6 seconds and northeast 2 feet at 11 seconds. Scattered showers.

MONDAY
East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 6 seconds and northeast 2 feet at 11 seconds.

MONDAY NIGHT
East winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 6 seconds and northeast 2 feet at 12 seconds.

TUESDAY
East winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 7 seconds and northeast 2 feet at 14 seconds. Scattered showers in the morning.

TUESDAY NIGHT
East winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet.

WEDNESDAY
East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet.

WEDNESDAY NIGHT
East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet.

THURSDAY
East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet.

THURSDAY NIGHT
East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet.

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AMZ712-040815
Coastal Waters of Northern Puerto Rico out 10 NM
338 PM AST Sat Oct 3 2026

TONIGHT
East winds 10 to 15 knots with gusts up to 25 knots, diminishing to 5 to 10 knots late. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 4 feet at 5 seconds and northeast 3 feet at 11 seconds. Isolated showers early this evening, then numerous showers late this evening. Scattered showers after midnight.

SUNDAY
East winds 5 to 10 knots, increasing to 10 to 15 knots with gusts up to 20 knots in the afternoon. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast 3 feet at 6 seconds and northeast 3 feet at 10 seconds. Scattered showers.

SUNDAY NIGHT
East winds 10 to 15 knots with gusts up to 20 knots, becoming southeast 5 to 10 knots after midnight. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 6 seconds and northeast 3 feet at 11 seconds. Numerous showers, mainly in the evening.

MONDAY
East winds 5 to 10 knots, increasing to 10 to 15 knots with gusts up to 20 knots in the afternoon. Seas around 3 feet. Wave Detail: Northeast 3 feet at 6 seconds and northeast 2 feet at 11 seconds.

MONDAY NIGHT
East 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: East 3 feet at 6 seconds and northeast 2 feet at 12 seconds. Scattered showers.

TUESDAY
East winds 5 to 10 knots, increasing to 10 to 15 knots with gusts up to 25 knots in the afternoon. Seas around 3 feet. Wave Detail: Northeast 3 feet at 6 seconds and northeast 2 feet at 14 seconds. Scattered showers.

TUESDAY NIGHT
East winds 10 to 15 knots with gusts up to 20 knots, diminishing to 5 to 10 knots after midnight. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers.

WEDNESDAY
East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers in the afternoon.

WEDNESDAY NIGHT
East winds 10 to 15 knots, becoming southeast 5 to 10 knots after midnight. Seas 3 to 4 feet, occasionally to 5 feet.

THURSDAY
East winds 5 to 10 knots, increasing to 10 to 15 knots in the afternoon. Seas around 3 feet. Scattered showers in the afternoon.

THURSDAY NIGHT
East winds 5 to 10 knots. Seas around 3 feet. Scattered showers.

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AMZ716-040815
Coastal Waters from Cabo San Juan to the waters between Anegada Island and Virgin Gorda and North 10 NM
338 PM AST Sat Oct 3 2026

TONIGHT
East winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 5 seconds and northeast 3 feet at 11 seconds. Scattered showers this evening, then isolated showers after midnight. Scattered showers late.

SUNDAY
East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 5 seconds and northeast 2 feet at 11 seconds. Scattered showers.

SUNDAY NIGHT
East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 5 seconds and northeast 2 feet at 11 seconds. Scattered showers.

MONDAY
East winds around 10 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 5 seconds and northeast 2 feet at 11 seconds. Scattered showers.

MONDAY NIGHT
East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 5 seconds and northeast 2 feet at 11 seconds.

TUESDAY
East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 5 seconds and northeast 2 feet at 13 seconds. Scattered showers in the morning.

TUESDAY NIGHT
East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Scattered showers.

WEDNESDAY
East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers in the morning.

WEDNESDAY NIGHT
East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet.

THURSDAY
East winds 10 to 15 knots. Seas 2 to 3 feet. Scattered showers.

THURSDAY NIGHT
East winds 10 to 15 knots. Seas 2 to 3 feet. Scattered showers.

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AMZ723-040815
Anegada Passage east of Virgin Gorda and Saint Croix south to 17N
338 PM AST Sat Oct 3 2026

TONIGHT
East winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 5 seconds and northeast 3 feet at 11 seconds. Isolated showers until early morning, then scattered showers late.

SUNDAY
East winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 5 seconds and northeast 2 feet at 11 seconds. Scattered showers.

SUNDAY NIGHT
East 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 2 feet at 11 seconds. Scattered showers.

MONDAY
East 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 2 feet at 11 seconds. Scattered showers.

MONDAY NIGHT
East winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 5 seconds and northeast 2 feet at 12 seconds.

TUESDAY
East winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 5 seconds and northeast 2 feet at 14 seconds. Scattered showers in the morning.

TUESDAY NIGHT
East winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers.

WEDNESDAY
East winds 10 to 15 knots. Seas around 4 feet, occasionally to 5 feet.

WEDNESDAY NIGHT
East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet.

THURSDAY
East winds 10 to 15 knots. Seas around 3 feet. Scattered showers in the morning.

THURSDAY NIGHT
East winds 10 to 15 knots. Seas around 3 feet. Scattered showers.

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AMZ726-040815
Coastal waters east of Puerto Rico, around Vieques, and around and just north of Culebra and Saint John
338 PM AST Sat Oct 3 2026

TONIGHT
East winds 10 to 15 knots with gusts up to 20 knots. Seas around 3 feet. Wave Detail: East 3 feet at 5 seconds. Scattered showers.

SUNDAY
East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 5 seconds. Scattered showers.

SUNDAY NIGHT
East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 5 seconds. Scattered showers.

MONDAY
East winds around 10 knots. Seas 2 to 3 feet. Wave Detail: East 2 feet at 5 seconds. Scattered showers.

MONDAY NIGHT
East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 5 seconds.

TUESDAY
East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 5 seconds. Scattered showers.

TUESDAY NIGHT
East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Scattered showers.

WEDNESDAY
East winds 10 to 15 knots. Seas 2 to 3 feet. Scattered showers.

WEDNESDAY NIGHT
East winds 10 to 15 knots. Seas 2 to 3 feet.

THURSDAY
East winds 10 to 15 knots. Seas 2 to 3 feet. Scattered showers.

THURSDAY NIGHT
East winds 10 to 15 knots. Seas 2 to 3 feet. Scattered showers.

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AMZ733-040815
Caribbean waters of Puerto Rico from 10 NM to 17N, including the coastal waters of Saint Croix
338 PM AST Sat Oct 3 2026

TONIGHT
East winds 10 to 15 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 6 seconds and northeast 1 foot at 10 seconds. Isolated showers.

SUNDAY
East winds 10 to 15 knots. Seas around 3 feet. Wave Detail: East 3 feet at 5 seconds and northeast 1 foot at 10 seconds. Scattered showers in the morning.

SUNDAY NIGHT
East winds 10 to 15 knots with gusts up to 20 knots. Seas around 3 feet. Wave Detail: East 3 feet at 5 seconds. Scattered showers in the evening.

MONDAY
East winds 10 to 15 knots with gusts up to 20 knots. Seas around 3 feet. Wave Detail: East 3 feet at 5 seconds. Scattered showers.

MONDAY NIGHT
East winds 10 to 15 knots with gusts up to 20 knots. Seas around 3 feet. Wave Detail: East 3 feet at 6 seconds. Scattered showers.

TUESDAY
East winds 10 to 15 knots with gusts up to 20 knots. Seas around 3 feet. Wave Detail: East 3 feet at 6 seconds. Scattered showers.

TUESDAY NIGHT
East winds 10 to 15 knots with gusts up to 20 knots. Seas around 3 feet. Scattered showers.

WEDNESDAY
East winds 10 to 15 knots. Seas around 3 feet. Scattered showers.

WEDNESDAY NIGHT
East winds 10 to 15 knots. Seas around 3 feet.

THURSDAY
East winds 10 to 15 knots. Seas around 3 feet. Scattered showers in the morning.

THURSDAY NIGHT
East winds 10 to 15 knots. Seas around 3 feet. Scattered showers.

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AMZ735-040815
Coastal Waters of Southern Puerto Rico out 10 NM
338 PM AST Sat Oct 3 2026

TONIGHT
East winds 10 to 15 knots with gusts up to 20 knots, diminishing to 5 to 10 knots late. Seas 2 to 3 feet. Wave Detail: East 3 feet at 6 seconds. Isolated showers.

SUNDAY
East winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 6 seconds.

SUNDAY NIGHT
East winds 10 to 15 knots, diminishing to 5 to 10 knots after midnight. Seas 2 to 3 feet. Wave Detail: East 3 feet at 6 seconds.

MONDAY
East winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: East 2 feet at 5 seconds.

MONDAY NIGHT
East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: East 2 feet at 6 seconds.

TUESDAY
East winds 5 to 10 knots, increasing to 10 to 15 knots with gusts up to 20 knots in the afternoon. Seas 2 to 3 feet. Wave Detail: East 3 feet at 6 seconds. Scattered showers in the morning.

TUESDAY NIGHT
East winds 5 to 10 knots. Seas 2 to 3 feet.

WEDNESDAY
East winds 5 to 10 knots, increasing to 10 to 15 knots in the afternoon. Seas 2 to 3 feet.

WEDNESDAY NIGHT
East winds 10 to 15 knots, diminishing to 5 to 10 knots after midnight. Seas 2 to 3 feet.

THURSDAY
East winds 5 to 10 knots, increasing to 10 to 15 knots in the afternoon. Seas 2 to 3 feet. Scattered showers in the morning.

THURSDAY NIGHT
East winds 10 to 15 knots. Seas 2 to 3 feet.

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AMZ741-040815
Mona Passage Southward to 17N
338 PM AST Sat Oct 3 2026

TONIGHT
East winds 10 to 15 knots with gusts up to 20 knots, diminishing to 5 to 10 knots late. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 6 seconds and north 2 feet at 12 seconds. Isolated thunderstorms this evening. Scattered showers.

SUNDAY
East winds 10 to 15 knots with gusts up to 20 knots, diminishing to 5 to 10 knots in the afternoon. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 6 seconds and northeast 2 feet at 10 seconds. Scattered showers.

SUNDAY NIGHT
East winds 10 to 15 knots with gusts up to 20 knots. Seas around 3 feet. Wave Detail: East 3 feet at 6 seconds and northeast 2 feet at 11 seconds. Scattered showers.

MONDAY
East winds 10 to 15 knots, diminishing to 5 to 10 knots in the afternoon. Seas around 3 feet. Wave Detail: East 3 feet at 6 seconds and northeast 2 feet at 11 seconds. Scattered showers in the afternoon.

MONDAY NIGHT
East winds 10 to 15 knots with gusts up to 20 knots. Seas around 3 feet. Wave Detail: East 3 feet at 6 seconds and northeast 2 feet at 11 seconds.

TUESDAY
East winds 10 to 15 knots with gusts up to 20 knots. Seas around 3 feet. Wave Detail: East 3 feet at 6 seconds and northeast 1 foot at 11 seconds. Scattered showers in the afternoon.

TUESDAY NIGHT
East winds 5 to 10 knots. Seas around 3 feet. Scattered showers.

WEDNESDAY
East winds 10 to 15 knots, diminishing to 5 to 10 knots in the afternoon. Seas around 3 feet. Scattered showers in the afternoon.

WEDNESDAY NIGHT
East winds 5 to 10 knots. Seas around 3 feet.

THURSDAY
East winds 10 to 15 knots. Seas around 3 feet. Numerous showers in the afternoon.

THURSDAY NIGHT
East winds 10 to 15 knots. Seas around 3 feet. Scattered showers.

Winds and seas higher in and near thunderstorms.

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AMZ742-040815
Coastal Waters of Northwestern Puerto Rico out 10 NM
338 PM AST Sat Oct 3 2026

TONIGHT
East winds 5 to 10 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: East 2 feet at 6 seconds and northeast 2 feet at 12 seconds. Showers with isolated thunderstorms early this evening, then isolated showers late this evening. Isolated showers late.

SUNDAY
East winds 5 to 10 knots, becoming northeast in the afternoon. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: East 2 feet at 6 seconds and northeast 2 feet at 10 seconds. Numerous showers in the afternoon.

SUNDAY NIGHT
East winds around 5 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 6 seconds and northeast 2 feet at 10 seconds. Showers in the evening.

MONDAY
Northeast winds around 5 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 6 seconds and northeast 2 feet at 11 seconds. Scattered showers in the afternoon.

MONDAY NIGHT
East winds around 5 knots. Seas 2 to 3 feet. Wave Detail: Northeast 2 feet at 11 seconds and southeast 1 foot at 6 seconds.

TUESDAY
East winds around 5 knots. Seas 2 to 3 feet. Wave Detail: East 2 feet at 6 seconds and northeast 2 feet at 11 seconds. Numerous showers in the afternoon.

TUESDAY NIGHT
East winds 5 to 10 knots. Seas 2 to 3 feet. Scattered showers.

WEDNESDAY
East winds 5 to 10 knots. Seas 2 to 3 feet. Numerous showers in the afternoon.

WEDNESDAY NIGHT
East winds 5 to 10 knots. Seas 2 to 3 feet.

THURSDAY
Southeast winds 5 to 10 knots. Seas 2 to 3 feet. Numerous showers in the afternoon.

THURSDAY NIGHT
East winds around 5 knots, increasing to 5 to 10 knots after midnight. Seas around 2 feet. Scattered showers.

Winds and seas higher in and near thunderstorms.

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AMZ745-040815
Coastal Waters of Southwestern Puerto Rico out 10 NM
338 PM AST Sat Oct 3 2026

TONIGHT
East winds 5 to 10 knots, diminishing to around 5 knots late. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 6 seconds and north 1 foot at 8 seconds. Numerous showers with isolated thunderstorms early this evening.

SUNDAY
East winds around 5 knots. Seas around 2 feet. Wave Detail: South 2 feet at 6 seconds and north 1 foot at 7 seconds. Scattered showers in the afternoon.

SUNDAY NIGHT
East winds 5 to 10 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at 6 seconds and north 1 foot at 7 seconds. Scattered showers in the evening.

MONDAY
East winds around 5 knots. Seas around 2 feet. Wave Detail: Southeast 1 foot at 6 seconds. Numerous showers in the afternoon.

MONDAY NIGHT
East winds 5 to 10 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at 6 seconds.

TUESDAY
East winds 5 to 10 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at 5 seconds. Scattered showers in the afternoon.

TUESDAY NIGHT
East winds around 5 knots. Seas around 2 feet.

WEDNESDAY
Southeast winds around 5 knots. Seas around 2 feet. Scattered showers in the afternoon.

WEDNESDAY NIGHT
East winds 5 to 10 knots. Seas around 2 feet.

THURSDAY
Southeast winds 10 to 15 knots. Seas around 2 feet. Scattered showers in the afternoon.

THURSDAY NIGHT
East winds 10 to 15 knots, diminishing to 5 to 10 knots after midnight. Seas around 2 feet.

Winds and seas higher in and near thunderstorms.