Coastal Waters Forecast
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
654 FZCA52 TJSJ 180728 CWFSJU Coastal Waters Forecast National Weather Service San Juan PR 328 AM AST Tue Nov 18 2025 Puerto Rico and the U.S. Virgin Islands Waters AMZ700-182015- 328 AM AST Tue Nov 18 2025 .SYNOPSIS FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS WATERS... Winds from the east will increase and become moderate today, shifting from the northeast by Wednesday night. The approach of a surface trough will bring showers and isolated thunderstorms across the local water and passages, likely to generate localized hazardous marine conditions for small craft. Pulses of a north northeasterly swell will continue to spread across the Atlantic waters and local passages through Wednesday. $$ AMZ711-182015- Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N- 328 AM AST Tue Nov 18 2025 .TODAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas 4 to 5 feet. Wave Detail: East 3 feet at 4 seconds and north 3 feet at 9 seconds. Scattered showers with isolated thunderstorms early this morning, then isolated showers late this morning and afternoon. .TONIGHT...East winds around 15 knots with gusts up to 25 knots. Seas around 5 feet. Wave Detail: East 4 feet at 5 seconds and north 2 feet at 9 seconds. .WEDNESDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas around 6 feet. Wave Detail: East 4 feet at 5 seconds and northwest 3 feet at 10 seconds. .WEDNESDAY NIGHT...Northeast winds 10 to 15 knots with gusts up to 20 knots. Seas around 5 feet. Wave Detail: East 4 feet at 5 seconds and north 3 feet at 11 seconds. Scattered showers after midnight. .THURSDAY...Northeast winds 10 to 15 knots with gusts up to 20 knots. Seas 4 to 5 feet. Wave Detail: East 4 feet at 5 seconds and north 3 feet at 11 seconds. .THURSDAY NIGHT...Northeast winds 10 to 15 knots with gusts up to 20 knots. Seas 4 to 5 feet. Wave Detail: East 3 feet at 5 seconds and north 3 feet at 10 seconds. .FRIDAY...Northeast winds 10 to 15 knots. Seas around 4 feet. .FRIDAY NIGHT...Northeast winds 10 to 15 knots. Seas around 4 feet. .SATURDAY...East winds around 10 knots. Seas 3 to 4 feet. .SATURDAY NIGHT...Northeast winds 10 to 15 knots. Seas around 3 feet. Scattered showers. Winds and seas higher in and near thunderstorms. $$ AMZ712-182015- Coastal Waters of Northern Puerto Rico out 10 NM- 328 AM AST Tue Nov 18 2025 .TODAY...East winds 5 to 10 knots, increasing to 10 to 15 knots with gusts up to 20 knots this afternoon. Seas around 4 feet. Wave Detail: Northeast 3 feet at 4 seconds and north 3 feet at 10 seconds. Isolated showers early this morning, then isolated thunderstorms late this morning and early afternoon. Scattered showers late this morning and afternoon. .TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 4 to 5 feet. Wave Detail: Northeast 3 feet at 5 seconds and north 2 feet at 9 seconds. Scattered showers. .WEDNESDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas 5 to 6 feet. Wave Detail: Northeast 4 feet at 5 seconds and north 2 feet at 10 seconds. Scattered showers in the morning. .WEDNESDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 4 to 5 feet. Wave Detail: Northeast 3 feet at 5 seconds and north 3 feet at 11 seconds. Scattered showers. .THURSDAY...Northeast winds 10 to 15 knots with gusts up to 20 knots. Seas 4 to 5 feet. Wave Detail: Northeast 3 feet at 5 seconds and north 3 feet at 11 seconds. .THURSDAY 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 3 feet at 11 seconds. Scattered showers. .FRIDAY...Northeast winds around 10 knots. Seas around 4 feet. .FRIDAY NIGHT...Northeast winds 5 to 10 knots. Seas 3 to 4 feet. .SATURDAY...East winds 5 to 10 knots. Seas around 3 feet. .SATURDAY NIGHT...East winds 5 to 10 knots. Seas around 3 feet. Scattered showers. Winds and seas higher in and near thunderstorms. $$ AMZ716-182015- Coastal Waters from Cabo San Juan to the waters between Anegada Island and Virgin Gorda and North 10 NM- 328 AM AST Tue Nov 18 2025 .TODAY...East winds 10 to 15 knots. Seas 3 to 5 feet. Wave Detail: East 3 feet at 4 seconds and north 3 feet at 10 seconds. Isolated thunderstorms until late afternoon. Scattered showers. .TONIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas 4 to 5 feet. Wave Detail: East 4 feet at 5 seconds and north 3 feet at 9 seconds. Scattered showers after midnight. .WEDNESDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas 4 to 6 feet. Wave Detail: East 4 feet at 5 seconds and north 2 feet at 9 seconds. .WEDNESDAY NIGHT...Northeast winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 5 feet. Wave Detail: East 3 feet at 5 seconds and northwest 3 feet at 10 seconds. Scattered showers. .THURSDAY...Northeast winds 10 to 15 knots. Seas 3 to 4 feet. Wave Detail: Northeast 3 feet at 5 seconds and north 3 feet at 11 seconds. .THURSDAY NIGHT...Northeast winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet. Wave Detail: Northeast 3 feet at 5 seconds and northwest 3 feet at 11 seconds. .FRIDAY...Northeast winds 10 to 15 knots. Seas 3 to 4 feet. .FRIDAY NIGHT...Northeast winds 10 to 15 knots. Seas 3 to 4 feet. .SATURDAY...East winds 10 to 15 knots. Seas 2 to 3 feet. .SATURDAY NIGHT...Northeast winds 10 to 15 knots. Seas 2 to 3 feet. Scattered showers. Winds and seas higher in and near thunderstorms. $$ AMZ723-182015- Anegada Passage east of Virgin Gorda and Saint Croix south to 17N- 328 AM AST Tue Nov 18 2025 .TODAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas around 4 feet. Wave Detail: East 4 feet at 5 seconds and northeast 2 feet at 13 seconds. Scattered showers. Isolated thunderstorms late this morning and afternoon. .TONIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas 4 to 5 feet. Wave Detail: East 4 feet at 5 seconds and northeast 2 feet at 14 seconds. Scattered showers. .WEDNESDAY...East winds 15 to 20 knots, diminishing to 10 to 15 knots in the afternoon. Seas 5 to 6 feet. Wave Detail: East 4 feet at 5 seconds and northeast 2 feet at 14 seconds. Scattered showers. .WEDNESDAY NIGHT...Northeast winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet. Wave Detail: East 4 feet at 5 seconds and northeast 2 feet at 13 seconds. .THURSDAY...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. .THURSDAY 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 2 feet at 13 seconds. .FRIDAY...Northeast winds 10 to 15 knots. Seas around 3 feet. .FRIDAY NIGHT...Northeast winds 10 to 15 knots. Seas around 3 feet. .SATURDAY...East winds 10 to 15 knots. Seas around 3 feet. .SATURDAY NIGHT...Northeast winds 10 to 15 knots. Seas around 3 feet. Winds and seas higher in and near thunderstorms. $$ AMZ726-182015- Coastal waters east of Puerto Rico, around Vieques, and around and just north of Culebra and Saint John- 328 AM AST Tue Nov 18 2025 .TODAY...East winds 10 to 15 knots. Seas 2 to 4 feet. Wave Detail: East 3 feet at 4 seconds and northeast 1 foot at 11 seconds. Isolated thunderstorms this morning. Scattered showers. .TONIGHT...East winds 10 to 15 knots, increasing to 15 to 20 knots after midnight. Seas 3 to 4 feet. Wave Detail: East 4 feet at 5 seconds and northeast 1 foot at 10 seconds. Scattered showers. .WEDNESDAY...East winds 15 to 20 knots, diminishing to 10 to 15 knots in the afternoon. Seas 3 to 5 feet. Wave Detail: East 4 feet at 5 seconds and northeast 1 foot at 12 seconds. Scattered showers in the afternoon. .WEDNESDAY NIGHT...Northeast winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet. Wave Detail: East 3 feet at 6 seconds. Scattered showers. .THURSDAY...Northeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 5 seconds. .THURSDAY NIGHT...Northeast winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: Northeast 3 feet at 5 seconds. .FRIDAY...Northeast winds 10 to 15 knots. Seas 2 to 3 feet. .FRIDAY NIGHT...Northeast winds 10 to 15 knots. Seas 2 to 3 feet. .SATURDAY...East winds around 10 knots. Seas 2 to 3 feet. .SATURDAY NIGHT...Northeast winds 10 to 15 knots. Seas 2 to 3 feet. Scattered showers. Winds and seas higher in and near thunderstorms. $$ AMZ733-182015- Caribbean waters of Puerto Rico from 10 NM to 17N, including the coastal waters of Saint Croix- 328 AM AST Tue Nov 18 2025 .TODAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas around 3 feet. Wave Detail: East 3 feet at 4 seconds and northeast 1 foot at 12 seconds. Scattered showers with isolated thunderstorms. .TONIGHT...East winds around 15 knots with gusts up to 25 knots. Seas 3 to 4 feet. Wave Detail: East 4 feet at 5 seconds and northeast 1 foot at 12 seconds. Scattered showers. .WEDNESDAY...East winds 15 to 20 knots, diminishing to 10 to 15 knots in the afternoon. Seas 4 to 5 feet. Wave Detail: East 4 feet at 6 seconds and northeast 1 foot at 12 seconds. Scattered showers. .WEDNESDAY NIGHT...Northeast winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet. Wave Detail: East 4 feet at 6 seconds and northeast 1 foot at 13 seconds. Scattered showers in the evening. .THURSDAY...Northeast winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet. Wave Detail: East 4 feet at 6 seconds and northeast 1 foot at 13 seconds. .THURSDAY NIGHT...Northeast 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 12 seconds. .FRIDAY...Northeast winds 10 to 15 knots. Seas around 3 feet. .FRIDAY NIGHT...Northeast winds 10 to 15 knots. Seas around 3 feet. .SATURDAY...East winds 10 to 15 knots. Seas around 3 feet. .SATURDAY NIGHT...Northeast winds 10 to 15 knots. Seas 2 to 3 feet. Winds and seas higher in and near thunderstorms. $$ AMZ735-182015- Coastal Waters of Southern Puerto Rico out 10 NM- 328 AM AST Tue Nov 18 2025 .TODAY...East winds 5 to 10 knots, increasing to 10 to 15 knots with gusts up to 20 knots late this morning and afternoon. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 4 seconds. Scattered showers with isolated thunderstorms early this morning, then isolated showers late this morning and afternoon. .TONIGHT...East winds 10 to 15 knots, diminishing to 5 to 10 knots after midnight. Seas 2 to 3 feet. Wave Detail: East 3 feet at 5 seconds. Scattered showers after midnight. .WEDNESDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas 3 to 4 feet. Wave Detail: East 3 feet at 5 seconds. Scattered showers in the morning. .WEDNESDAY NIGHT...Northeast winds 10 to 15 knots with gusts up to 20 knots, diminishing to 5 to 10 knots after midnight. Seas 2 to 4 feet. Wave Detail: East 3 feet at 6 seconds. Scattered showers after midnight. .THURSDAY...Northeast winds 5 to 10 knots, becoming east 10 to 15 knots in the afternoon. Seas 2 to 3 feet. Wave Detail: East 3 feet at 6 seconds. Scattered showers in the afternoon. .THURSDAY NIGHT...Northeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 6 seconds. Scattered showers in the evening. .FRIDAY...East winds 5 to 10 knots. Seas around 2 feet. .FRIDAY NIGHT...Northeast winds 5 to 10 knots. Seas around 2 feet. .SATURDAY...East winds 5 to 10 knots. Seas around 2 feet. .SATURDAY NIGHT...Northeast winds 5 to 10 knots. Seas around 2 feet. Winds and seas higher in and near thunderstorms. $$ AMZ741-182015- Mona Passage Southward to 17N- 328 AM AST Tue Nov 18 2025 .TODAY...East winds 10 to 15 knots, diminishing to 5 to 10 knots early this afternoon, then increasing to 10 to 15 knots late. Seas 3 to 4 feet. Wave Detail: East 3 feet at 4 seconds and north 3 feet at 11 seconds. Scattered showers with isolated thunderstorms early this morning. Isolated showers late this morning and early afternoon, then scattered showers with isolated thunderstorms late. .TONIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas 3 to 5 feet. Wave Detail: East 4 feet at 5 seconds and north 2 feet at 9 seconds. Scattered showers. .WEDNESDAY...East winds 15 to 20 knots, diminishing to 10 to 15 knots in the afternoon. Seas 4 to 6 feet. Wave Detail: East 4 feet at 6 seconds and north 2 feet at 9 seconds. Scattered showers in the morning. .WEDNESDAY NIGHT...Northeast winds 10 to 15 knots with gusts up to 25 knots. Seas 4 to 5 feet. Wave Detail: East 4 feet at 6 seconds and north 2 feet at 10 seconds. Scattered showers in the evening. .THURSDAY...Northeast 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. .THURSDAY NIGHT...Northeast winds 10 to 15 knots with gusts up to 25 knots. Seas 4 to 5 feet. Wave Detail: Northeast 4 feet at 6 seconds and north 2 feet at 11 seconds. Scattered showers in the evening. .FRIDAY...Northeast winds 10 to 15 knots. Seas 3 to 5 feet. .FRIDAY NIGHT...Northeast winds 15 to 20 knots, diminishing to 10 to 15 knots after midnight. Seas 3 to 4 feet. .SATURDAY...Northeast winds 10 to 15 knots. Seas 3 to 4 feet. .SATURDAY NIGHT...Northeast winds 10 to 15 knots. Seas around 3 feet. Winds and seas higher in and near thunderstorms. $$ AMZ742-182015- Coastal Waters of Northwestern Puerto Rico out 10 NM- 328 AM AST Tue Nov 18 2025 .TODAY...East winds 5 to 10 knots, diminishing to around 5 knots late this morning, then becoming northeast with gusts up to 20 knots this afternoon. Seas 2 to 4 feet. Wave Detail: North 4 feet at 10 seconds. Isolated showers late this morning. Showers with isolated thunderstorms this afternoon. .TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 4 feet. Wave Detail: Northeast 3 feet at 5 seconds and north 3 feet at 9 seconds. .WEDNESDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 5 feet. Wave Detail: Northeast 3 feet at 5 seconds and north 2 feet at 10 seconds. Scattered showers in the afternoon. .WEDNESDAY NIGHT...Northeast winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 5 feet. Wave Detail: Northeast 3 feet at 5 seconds and north 2 feet at 9 seconds. Scattered showers in the evening. .THURSDAY...Northeast winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 5 feet. Wave Detail: Northeast 3 feet at 5 seconds and north 3 feet at 11 seconds. .THURSDAY NIGHT...Northeast winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 5 feet. Wave Detail: Northeast 3 feet at 5 seconds and north 3 feet at 11 seconds. .FRIDAY...Northeast winds 10 to 15 knots. Seas 3 to 4 feet. .FRIDAY NIGHT...Northeast winds 10 to 15 knots. Seas 2 to 4 feet. .SATURDAY...Northeast winds 10 to 15 knots. Seas 2 to 4 feet. .SATURDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet. Winds and seas higher in and near thunderstorms. $$ AMZ745-182015- Coastal Waters of Southwestern Puerto Rico out 10 NM- 328 AM AST Tue Nov 18 2025 .TODAY...East winds around 5 knots. Seas 2 to 3 feet. Wave Detail: North 2 feet at 9 seconds and southeast 1 foot at 4 seconds. Showers with isolated thunderstorms this afternoon. .TONIGHT...East winds around 5 knots. Seas 2 to 3 feet. Wave Detail: North 2 feet at 10 seconds and southeast 1 foot at 5 seconds. .WEDNESDAY...East winds 5 to 10 knots, becoming southeast in the afternoon. Seas 2 to 4 feet. Wave Detail: North 2 feet at 9 seconds and southeast 1 foot at 5 seconds. Numerous showers in the afternoon. .WEDNESDAY NIGHT...Northeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 6 seconds and northwest 2 feet at 8 seconds. Scattered showers in the evening. .THURSDAY...Northeast winds 5 to 10 knots. Seas 2 to 4 feet. Wave Detail: Northwest 3 feet at 9 seconds and east 2 feet at 5 seconds. Scattered showers in the afternoon. .THURSDAY NIGHT...Northeast winds 5 to 10 knots with gusts up to 20 knots. Seas 2 to 4 feet. Wave Detail: North 3 feet at 9 seconds and east 2 feet at 6 seconds. Scattered showers in the evening. .FRIDAY...Northeast winds 5 to 10 knots. Seas 2 to 4 feet. .FRIDAY NIGHT...Northeast winds 10 to 15 knots. Seas 2 to 3 feet. .SATURDAY...East winds 5 to 10 knots. Seas 2 to 3 feet. .SATURDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet. Winds and seas higher in and near thunderstorms. $$