FZCA52 TJSJ 150726 CWFSJU Coastal Waters Forecast National Weather Service San Juan PR 326 AM AST Thu Oct 15 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. AMZ700-152015- 326 AM AST Thu Oct 15 2026 .Synopsis for Puerto Rico and the U.S. Virgin Islands Waters... Generally favorable marine conditions are expected through the end of the workweek, with light to moderate easterly winds and relatively tranquil seas. However, afternoon showers and isolated thunderstorms may produce locally hazardous conditions, particularly across the western and coastal waters of Puerto Rico. A lingering northeasterly swell will gradually subside through Friday, followed by another long-period northeasterly swell arriving over the weekend, resulting in increasing seas across the Atlantic waters. $$ AMZ711-152015- Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N- 326 AM AST Thu Oct 15 2026 .TODAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast 3 feet at 8 seconds and east 2 feet at 4 seconds. Scattered showers early this morning, then isolated showers late this morning and afternoon. .TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 4 seconds and northeast 3 feet at 8 seconds. Scattered showers after midnight. .FRIDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas around 3 feet. Wave Detail: Northeast 3 feet at 8 seconds and east 2 feet at 4 seconds. Scattered showers in the morning. .FRIDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 4 seconds and east 3 feet at 8 seconds. Scattered showers after midnight. .SATURDAY...East winds 10 to 15 knots, diminishing to 5 to 10 knots in the afternoon. Seas around 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 5 seconds and northeast 3 feet at 13 seconds. Scattered showers in the morning. .SATURDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 3 feet at 5 seconds and east 3 feet at 8 seconds. .SUNDAY...East winds 5 to 10 knots. Seas 3 to 4 feet, occasionally to 5 feet. .SUNDAY NIGHT...East winds around 10 knots. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers. .MONDAY...East winds 5 to 10 knots. Seas around 4 feet, occasionally to 5 feet. Scattered showers. .MONDAY NIGHT...East winds around 10 knots. Seas around 4 feet, occasionally to 5 feet. Scattered showers. $$ AMZ712-152015- Coastal Waters of Northern Puerto Rico out 10 NM- 326 AM AST Thu Oct 15 2026 .TODAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast 3 feet at 8 seconds and east 2 feet at 4 seconds. Scattered showers, mainly this morning. .TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast 3 feet at 8 seconds and northeast 2 feet at 5 seconds. Scattered showers. .FRIDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast 3 feet at 4 seconds and northeast 3 feet at 8 seconds. Scattered showers in the morning. .FRIDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast 3 feet at 5 seconds and northeast 2 feet at 8 seconds. Scattered showers in the evening. .SATURDAY...East winds 5 to 10 knots, increasing to 10 to 15 knots with gusts up to20 knots in the afternoon. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast 3 feet at 5 seconds and northeast 3 feet at 12 seconds. Scattered showers in the afternoon. .SATURDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots, becoming southeast 5 to 10 knots after midnight. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast 3 feet at 7 seconds and north 3 feet at 12 seconds. Scattered showers in the evening. .SUNDAY...East winds 5 to 10 knots, increasing to 10 to 15 knots in the afternoon. Seas around 4 feet, occasionally to 5 feet. .SUNDAY NIGHT...East winds 5 to 10 knots. Seas 3 to 4 feet, occasionally to 5 feet. .MONDAY...East winds 5 to 10 knots, increasing to 10 to 15 knots in the afternoon. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers in the afternoon. .MONDAY NIGHT...East winds 5 to 10 knots. Seas 3 to 4 feet, occasionally to 5 feet. $$ AMZ716-152015- Coastal Waters from Cabo San Juan to the waters between Anegada Island and Virgin Gorda and North 10 NM- 326 AM AST Thu Oct 15 2026 .TODAY...East winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast 3 feet at 8 seconds and east 2 feet at 4 seconds. Scattered showers. .TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: Northeast 3 feet at 8 seconds and east 2 feet at 4 seconds. Scattered showers. .FRIDAY...East winds around 10 knots. Seas 2 to 3 feet. Wave Detail: East 2 feet at 4 seconds and northeast 2 feet at 8 seconds. .FRIDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 4 seconds and northeast 2 feet at 8 seconds. Scattered showers. .SATURDAY...East winds around 10 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 4 seconds and north 2 feet at 13 seconds. Scattered showers. .SATURDAY NIGHT...East winds around 10 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: North 3 feet at 12 seconds and east 2 feet at 4 seconds. Scattered showers in the evening. .SUNDAY...East winds around 10 knots. Seas 2 to 4 feet, occasionally to 5 feet. Scattered showers in the morning. .SUNDAY NIGHT...East winds around 10 knots. Seas 2 to 3 feet. Scattered showers. .MONDAY...East winds around 10 knots. Seas 2 to 3 feet. Scattered showers. .MONDAY NIGHT...East winds around 10 knots. Seas 2 to 3 feet. Scattered showers. $$ AMZ723-152015- Anegada Passage east of Virgin Gorda and Saint Croix south to 17N- 326 AM AST Thu Oct 15 2026 .TODAY...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 4 seconds and northeast 2 feet at 8 seconds. Isolated showers. .TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas around 3 feet. Wave Detail: East 2 feet at 5 seconds and northeast 2 feet at 8 seconds. Scattered showers. .FRIDAY...East winds around 10 knots. Seas around 3 feet. Wave Detail: East 2 feet at 4 seconds and northeast 2 feet at 8 seconds. .FRIDAY 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 4 seconds and northeast 2 feet at 8 seconds. Scattered showers. .SATURDAY...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 4 seconds and east 2 feet at 8 seconds. .SATURDAY NIGHT...East winds around 10 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 4 seconds and northeast 3 feet at 12 seconds. .SUNDAY...East winds around 10 knots. Seas 3 to 4 feet, occasionally to 5 feet. .SUNDAY NIGHT...East winds around 10 knots. Seas around 3 feet. .MONDAY...East winds around 10 knots. Seas around 3 feet. Scattered showers. .MONDAY NIGHT...East winds around 10 knots. Seas around 3 feet. Scattered showers. $$ AMZ726-152015- Coastal waters east of Puerto Rico, around Vieques, and around and just north of Culebra and Saint John- 326 AM AST Thu Oct 15 2026 .TODAY...East winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: East 2 feet at 4 seconds and northeast 2 feet at 8 seconds. Scattered showers early this morning, then isolated showers late this morning and afternoon. .TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: East 2 feet at 5 seconds and northeast 2 feet at 8 seconds. Scattered showers. .FRIDAY...East winds around 10 knots. Seas 2 to 3 feet. Wave Detail: East 2 feet at 5 seconds and northeast 2 feet at 8 seconds. .FRIDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: East 2 feet at 4 seconds and northeast 2 feet at 8 seconds. Scattered showers. .SATURDAY...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: East 2 feet at 4 seconds and east 1 foot at 8 seconds. Scattered showers. .SATURDAY NIGHT...East winds around 10 knots. Seas 2 to 3 feet. Wave Detail: East 2 feet at 5 seconds and east 1 foot at 8 seconds. Scattered showers. .SUNDAY...East winds 5 to 10 knots. Seas 2 to 3 feet. Scattered showers in the morning. .SUNDAY NIGHT...East winds around 10 knots. Seas 2 to 3 feet. Scattered showers. .MONDAY...East winds around 10 knots. Seas 2 to 3 feet. Scattered showers. .MONDAY NIGHT...East winds around 10 knots. Seas 2 to 3 feet. Scattered showers. $$ AMZ733-152015- Caribbean waters of Puerto Rico from 10 NM to 17N, including the coastal waters of Saint Croix- 326 AM AST Thu Oct 15 2026 .TODAY...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 1 foot at 8 seconds. Isolated showers. .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 and northeast 1 foot at 8 seconds. Scattered showers. .FRIDAY...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 east 1 foot at 8 seconds. Scattered showers in the morning. .FRIDAY 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 east 1 foot at 8 seconds. Scattered showers. .SATURDAY...East winds 10 to 15 knots. Seas around 3 feet. Wave Detail: East 3 feet at 5 seconds and east 1 foot at 8 seconds. .SATURDAY NIGHT...East winds around 10 knots. Seas around 3 feet. Wave Detail: East 3 feet at 5 seconds and east 1 foot at 8 seconds. Scattered showers after midnight. .SUNDAY...East winds around 10 knots. Seas around 3 feet. .SUNDAY NIGHT...East winds around 10 knots. Seas 2 to 3 feet. .MONDAY...East winds around 10 knots. Seas 2 to 3 feet. Scattered showers. .MONDAY NIGHT...East winds around 10 knots. Seas 2 to 3 feet. Scattered showers. $$ AMZ735-152015- Coastal Waters of Southern Puerto Rico out 10 NM- 326 AM AST Thu Oct 15 2026 .TODAY...East winds 5 to 10 knots, increasing to 10 to 15 knots late this morning and afternoon. Seas 2 to 3 feet. Wave Detail: East 2 feet at 5 seconds. Isolated showers. .TONIGHT...East winds 10 to 15 knots, becoming northeast 5 to 10 knots after midnight. Seas 2 to 3 feet. Wave Detail: East 2 feet at 5 seconds and east 1 foot at 8 seconds. Scattered showers after midnight. .FRIDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: East 2 feet at 5 seconds. .FRIDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: East 2 feet at 5 seconds. .SATURDAY...East winds around 10 knots. Seas 2 to 3 feet. Wave Detail: East 2 feet at 5 seconds. .SATURDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: East 2 feet at 5 seconds. Scattered showers in the evening. .SUNDAY...East winds 5 to 10 knots. Seas 2 to 3 feet. .SUNDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. .MONDAY...East winds 5 to 10 knots. Seas around 2 feet. .MONDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet. $$ AMZ741-152015- Mona Passage Southward to 17N- 326 AM AST Thu Oct 15 2026 .TODAY...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 8 seconds. Isolated showers early this morning. Scattered showers late this morning and early afternoon, then isolated showers late. .TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 3 feet at 5 seconds and northeast 2 feet at 8 seconds. Scattered showers. .FRIDAY...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 8 seconds. Scattered showers in the afternoon. .FRIDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas around 3 feet. Wave Detail: Southeast 3 feet at 5 seconds and north 1 foot at 8 seconds. Scattered showers after midnight. .SATURDAY...East winds 10 to 15 knots with gusts up to 20 knots, diminishing to 5 to 10 knots in the afternoon. Seas around 3 feet. Wave Detail: East 3 feet at 5 seconds and north 2 feet at 14 seconds. Scattered showers in the morning. .SATURDAY NIGHT...East winds 5 to 10 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 3 feet at 5 seconds and north 3 feet at 12 seconds. .SUNDAY...East winds 5 to 10 knots. Seas 3 to 4 feet, occasionally to 5 feet. .SUNDAY NIGHT...East winds 5 to 10 knots. Seas 3 to 4 feet, occasionally to 5 feet. .MONDAY...East winds 5 to 10 knots. Seas around 3 feet. .MONDAY NIGHT...East winds 5 to 10 knots. Seas around 3 feet. $$ AMZ742-152015- Coastal Waters of Northwestern Puerto Rico out 10 NM- 326 AM AST Thu Oct 15 2026 .TODAY...East winds 10 to 15 knots with gusts up to 20 knots, diminishing to 5 to 10 knots late this morning and afternoon. Seas 2 to 3 feet. Wave Detail: Northeast 3 feet at 8 seconds and southeast 1 foot at 2 seconds. Scattered showers early this afternoon. Isolated thunderstorms this afternoon. Numerous showers late. .TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: Northeast 3 feet at 8 seconds and east 2 feet at 4 seconds. Scattered showers in the evening. .FRIDAY...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: East 2 feet at 5 seconds and northeast 2 feet at 8 seconds. Scattered showers in the afternoon. .FRIDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: Northeast 2 feet at 8 seconds and southeast 1 foot at 4 seconds. .SATURDAY...Northeast winds around 5 knots. Seas 2 to 3 feet. Wave Detail: East 2 feet at 5 seconds and northeast 2 feet at 13 seconds. Scattered showers in the afternoon. .SATURDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: North 3 feet at 12 seconds and southeast 1 foot at 5 seconds. .SUNDAY...Northeast winds around 5 knots. Seas 2 to 4 feet, occasionally to 5 feet. Scattered showers in the afternoon. .SUNDAY NIGHT...East winds around 5 knots. Seas 2 to 4 feet, occasionally to 5 feet. .MONDAY...Northeast winds around 5 knots. Seas 2 to 3 feet. Scattered showers in the afternoon. .MONDAY NIGHT...East winds around 5 knots. Seas 2 to 3 feet. Winds and seas higher in and near thunderstorms. $$ AMZ745-152015- Coastal Waters of Southwestern Puerto Rico out 10 NM- 326 AM AST Thu Oct 15 2026 .TODAY...Eastwinds 5 to 10 knots, becoming southeast early this afternoon, then becoming east late. Seas around 2 feet. Wave Detail: Southeast 1 foot at 5 seconds and north 1 foot at 8 seconds. Scattered showers with isolated thunderstorms early this afternoon. Showers and scattered thunderstorms late. .TONIGHT...Northeast winds 5 to 10 knots. Seas around 2 feet. Wave Detail: Southeast 1 foot at 5 seconds and north 1 foot at 8 seconds. Numerous showers in the evening. .FRIDAY...East winds around 5 knots, becoming southeast in the afternoon. Seas around 2 feet. Wave Detail: Southeast 1 foot at 5 seconds and north 1 foot at 7 seconds. Numerous showers in the afternoon. .FRIDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at 5 seconds and north 1 foot at 8 seconds. .SATURDAY...East winds 5 to 10 knots. Seas around 2 feet. Wave Detail: Southeast 1 foot at 5 seconds and north 1 foot at 7 seconds. .SATURDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at 5 seconds and north 1 foot at 8 seconds. .SUNDAY...Southeast winds around 5 knots. Seas around 2 feet. Scattered showers in the afternoon. .SUNDAY NIGHT...East winds around 5 knots. Seas around 2 feet. .MONDAY...East winds 5 to 10 knots, becoming southeast in the afternoon. Seas around 2 feet. Scattered showers in the afternoon. .MONDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet. Winds and seas higher in and near thunderstorms. $$