FZCA52 TJSJ 152018 AAA CWFSJU Coastal Waters Forecast...UPDATED National Weather Service San Juan PR 418 PM 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. AMZ700-161000- 418 PM AST Thu Oct 15 2026 .Synopsis for Puerto Rico and the U.S. Virgin Islands Waters... Predominantly tranquil conditions will persist across the local waters for the rest of the week. A surface high pressure moving east across the northwestern Atlantic will maintain gentle to moderate E winds, shifting to ESE by Saturday as the high pressure moves into the central Atlantic. A small long-period NNE swell approaching the Atlantic waters will linger into the weekend. By early next week an additional NNW swell will reach the Atlantic waters as a distant surface low pressure moves east into the western Atlantic. Showers and isolated thunderstorms may produce locally hazardous conditions each afternoon, particularly across the western and coastal waters of Puerto Rico. $$ AMZ711-161000- Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N- 418 PM AST Thu Oct 15 2026 .TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 4 seconds and northeast 3 feet at 8 seconds. Isolated showers early this evening, then scattered showers late this evening and overnight. .FRIDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 5 seconds and northeast 2 feet at 8 seconds. Scattered showers in the morning. .FRIDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas around 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 5 seconds and east 2 feet at 8 seconds. Scattered showers. .SATURDAY...East winds 10 to 15 knots, diminishing to 5 to 10 knots in the afternoon. Seas around 4 feet, occasionally to 5 feet. Wave Detail: Northeast 3 feet at 7 seconds and northeast 3 feet at 13 seconds. Scattered showers in the morning. .SATURDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas around 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 4 seconds and east 3 feet at 8 seconds. .SUNDAY...East winds 5 to 10 knots. Seas around 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 9 seconds and north 3 feet at 12 seconds. .SUNDAY NIGHT...East winds 5 to 10 knots. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers. .MONDAY...East winds 5 to 10 knots. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers. .MONDAY NIGHT...East winds around 10 knots. Seas 4 to 5 feet, occasionally to 6 feet. Scattered showers. .TUESDAY...East winds 5 to 10 knots. Seas 4 to 6 feet, occasionally to 8 feet. Scattered showers in the morning. .TUESDAY NIGHT...Southeast winds 5 to 10 knots. Seas 6 to 7 feet, occasionally to 9 feet. $$ AMZ712-161000- Coastal Waters of Northern Puerto Rico out 10 NM- 418 PM AST Thu Oct 15 2026 .TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots, diminishing to 5 to 10 knots with gusts up to 20 knots after midnight. Seas around 3 feet. Wave Detail: Northeast 3 feet at 8 seconds and northeast 2 feet at 4 seconds. Isolated showers early this evening, then scattered showers late this evening and overnight. .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 5 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. .SATURDAY...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 7 seconds and northeast 2 feet at 13 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 around 4 feet, occasionally to 5 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. Seas around 4 feet, occasionally to 5 feet. Wave Detail: Northeast 3 feet at 8 seconds and north 3 feet at 11 seconds. .SUNDAY NIGHT...East winds 5 to 10 knots. Seas around 3 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. .TUESDAY...Southeast winds 5 to 10 knots, becoming east 10 to 15 knots in the afternoon. Seas 4 to 6 feet, occasionally to 8 feet. Scattered showers in the afternoon. .TUESDAY NIGHT...Southeast winds 5 to 10 knots. Seas around 6 feet, occasionally to 8 feet. $$ AMZ716-161000- Coastal Waters from Cabo San Juan to the waters between Anegada Island and Virgin Gorda and North 10 NM- 418 PM AST Thu Oct 15 2026 .TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: Northeast 3 feet at 8 seconds and east 2 feet at 4 seconds. Isolated showers early this evening, then scattered showers late this evening and early morning. Isolated showers late. .FRIDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: East 2 feet at 4 seconds and northeast 2 feet at 8 seconds. .FRIDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 4 seconds and northeast 2 feet at 8 seconds. Scattered showers. .SATURDAY...East winds around 10 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 4 seconds and north 2 feet at 13 seconds. Scattered showers. .SATURDAY NIGHT...East winds around 10 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: North 3 feet at 12 seconds and east 2 feet at 4 seconds. Scattered showers in the evening. .SUNDAY...East winds around 10 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast 3 feet at 9 seconds and northeast 3 feet at 11 seconds. Scattered showers in the morning. .SUNDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. Scattered showers. .MONDAY...East winds around 10 knots. Seas 2 to 3 feet. Scattered showers. .MONDAY NIGHT...East winds around 10 knots. Seas 2 to 3 feet. Scattered showers. .TUESDAY...Southeast winds around 10 knots. Seas 2 to 4 feet, occasionally to 5 feet. Scattered showers in the morning. .TUESDAY NIGHT...Southeast winds 5 to 10 knots. Seas 4 to 6 feet, occasionally to 8 feet. Scattered showers. $$ AMZ723-161000- Anegada Passage east of Virgin Gorda and Saint Croix south to 17N- 418 PM AST Thu Oct 15 2026 .TONIGHT...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 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 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 14 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 northeast 3 feet at 12 seconds. .SATURDAY NIGHT...East winds 5 to 10 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast 3 feet at 12 seconds and southeast 2 feet at 4 seconds. .SUNDAY...East winds 5 to 10 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast 3 feet at 12 seconds and southeast 2 feet at 5 seconds. .SUNDAY NIGHT...East winds 5 to 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. .TUESDAY...East winds around 10 knots. Seas around 3 feet. Scattered showers in the morning. .TUESDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 4 feet, occasionally to 5 feet. $$ AMZ726-161000- Coastal waters east of Puerto Rico, around Vieques, and around and just north of Culebra and Saint John- 418 PM AST Thu Oct 15 2026 .TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 5 seconds and northeast 2 feet at 8 seconds. Scattered showers. .FRIDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: East 2 feet at 5 seconds and northeast 1 foot at 8 seconds. .FRIDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 5 seconds and northeast 1 foot at 8 seconds. Scattered showers. .SATURDAY...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: East 2 feet at 5 seconds and northeast 1 foot at 8 seconds. Scattered showers. .SATURDAY NIGHT...East winds around 10 knots. Seas 2 to 3 feet. Wave Detail: East 2 feet at 5 seconds and east 1 foot at 8 seconds. Scattered showers. .SUNDAY...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: East 2 feet at 5 seconds and east 2 feet at 9 seconds. Scattered showers in the morning. .SUNDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. Scattered showers. .MONDAY...East winds 5 to 10 knots. Seas 2 to 3 feet. Scattered showers. .MONDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. Scattered showers. .TUESDAY...Southeast winds 5 to 10 knots. Seas 2 to 3 feet. Scattered showers. .TUESDAY NIGHT...Southeast winds 5 to 10 knots. Seas 2 to 4 feet, occasionally to 5 feet. Scattered showers. $$ AMZ733-161000- Caribbean waters of Puerto Rico from 10 NM to 17N, including the coastal waters of Saint Croix- 418 PM AST Thu Oct 15 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 and east 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 2 feet at 5 seconds and east 1 foot at 8 seconds. Scattered showers after midnight. .SUNDAY...East winds 5 to 10 knots. Seas around 3 feet. Wave Detail: East 2 feet at 5 seconds and east 1 foot at 8 seconds. .SUNDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. .MONDAY...East winds 5 to 10 knots. Seas 2 to 3 feet. Scattered showers. .MONDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. Scattered showers. .TUESDAY...East winds 5 to 10 knots. Seas 2 to3 feet. Scattered showers in the morning. .TUESDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. $$ AMZ735-161000- Coastal Waters of Southern Puerto Rico out 10 NM- 418 PM AST Thu Oct 15 2026 .TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots, diminishing to 5 to 10 knots with gusts up to 20 knots after midnight. Seas 2 to 3 feet. Wave Detail: East 2 feet at 5 seconds and east 1 foot at 8 seconds. Scattered showers early this evening. Isolated showers late this evening and early morning, then scattered showers late. .FRIDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 5 seconds. .FRIDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 5 seconds. .SATURDAY...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: East 2 feet at 5 seconds. .SATURDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet. Wave Detail: East 2 feet at 5 seconds. Scattered showers in the evening. .SUNDAY...East winds 5 to 10 knots. Seas around 2 feet. Wave Detail: East 2 feet at 5 seconds. .SUNDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet. .MONDAY...East winds 5 to 10 knots. Seas around 2 feet. .MONDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet. .TUESDAY...East winds 5 to 10 knots. Seas around 2 feet. .TUESDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet. $$ AMZ741-161000- Mona Passage Southward to 17N- 418 PM AST Thu Oct 15 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: Southeast 3 feet at 5 seconds and northeast 2 feet at 8 seconds. Scattered showers this evening. Isolated showers after midnight, then scattered showers late. .FRIDAY...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. Scattered showers in the afternoon. .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 5 seconds and north 1 foot at 8 seconds. .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 1 foot at 8 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: Northeast 3 feet at 6 seconds and north 3 feet at 12 seconds. .SUNDAY...East winds 5 to 10 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: North 3 feet at 12 seconds and east 2 feet at 5 seconds. .SUNDAY NIGHT...East winds 5 to 10 knots. Seas around 3 feet. .MONDAY...East winds 5 to 10 knots. Seas around 3 feet. .MONDAY NIGHT...East winds 5 to 10 knots. Seas around 3 feet. .TUESDAY...East winds 5 to 10 knots. Seas 3 to 5 feet, occasionally to 6 feet. .TUESDAY NIGHT...East winds 5 to 10 knots. Seas 4 to 6 feet, occasionally to 8 feet. $$ AMZ742-161000- Coastal Waters of Northwestern Puerto Rico out 10 NM- 418 PM AST Thu Oct 15 2026 .TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots, diminishing to 5 to 10 knots late. Seas 2 to 3 feet. Wave Detail: Northeast 3 feet at 8 seconds and northeast 2 feet at 4 seconds. Scattered showers early this evening, then isolated showers late this evening. Isolated showers late. .FRIDAY...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: Northeast 2 feet at 5 seconds and northeast 2 feet at 8 seconds. Scattered showers in the afternoon. .FRIDAY NIGHT...East winds 10 to 15 knots, diminishing to 5 to 10 knots after midnight. Seas 2 to 3 feet. Wave Detail: Northeast 2 feet at 7 seconds and northeast 1 foot at 14 seconds. .SATURDAY...East winds 5 to 10 knots, becoming northeast in the afternoon. Seas 2 to 3 feet. Wave Detail: Northeast 2 feet at 5 seconds and northeast 2 feet at 13 seconds. Scattered showers in the afternoon. .SATURDAY NIGHT...East winds around 5 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: North 3 feet at 12 seconds and east 2 feet at 5 seconds. .SUNDAY...Northeast winds around 5 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: North 3 feet at 11 seconds and southeast 1 foot at 6 seconds. Scattered showers in the afternoon. .SUNDAY NIGHT...East winds around 5 knots. Seas 2 to 4 feet, occasionally to 5 feet. .MONDAY...Northeast winds around 5 knots. Seas 2 to 3 feet. Scattered showers in the afternoon. .MONDAY NIGHT...East winds around 5 knots. Seas 2 to 3 feet. .TUESDAY...East winds around 5 knots. Seas 3 to 5 feet, occasionally to 6 feet. Scattered showers in the afternoon. .TUESDAY NIGHT...East winds around 5 knots. Seas 5 to 7 feet, occasionally to 9 feet. $$ AMZ745-161000- Coastal Waters of Southwestern Puerto Rico out 10 NM- 418 PM AST Thu Oct 15 2026 .TONIGHT...East 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 with isolated thunderstorms early this evening, then scattered showers late this evening. Isolated showers after midnight. .FRIDAY...East winds 5 to 10 knots. Seas around 2 feet. Wave Detail: Southeast 1 foot at 5 seconds and north 1 foot at 6 seconds. Numerous showers in the afternoon. .FRIDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet. Wave Detail: Southeast 1 foot at 5 seconds and north 1 foot at 8 seconds. .SATURDAY...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 8 seconds. .SATURDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet. Wave Detail: Southeast 1 foot at 5 seconds and north 1 foot at 8 seconds. .SUNDAY...East winds 5 to 10 knots, becoming southeast in the afternoon. Seas around 2 feet. Wave Detail: Southeast 1 foot at 5 seconds and north 1 foot at 8 seconds. Scattered showers in the afternoon. .SUNDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet. .MONDAY...Southeast winds 5 to 10 knots. Seas around 2 feet. Scattered showers in the afternoon. .MONDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet. .TUESDAY...Southeast winds 5 to 10 knots. Seas 2 to 3 feet. Scattered showers in the afternoon. .TUESDAY NIGHT...East winds 5 to 10 knots. Seas 3 to 4 feet, occasionally to 5 feet. Winds and seas higher in and near thunderstorms. $$