FZCA52 TJSJ 230751 CWFSJU Coastal Waters Forecast National Weather Service San Juan PR 351 AM AST Sun Aug 23 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. AMZ700-232015- 351 AM AST Sun Aug 23 2026 .Synopsis for Puerto Rico and the U.S. Virgin Islands Waters... A weak tropical wave will approach the region later today and into tonight, bringing increased moisture and passing showers across the local waters. Moderate easterly trade winds will prevail through the rest of the weekend under the influence of surface high pressure over the Atlantic. However, winds may briefly weaken as the pressure gradient relaxes. Afterward, another tropical wave is forecast to approach the eastern Caribbean around Tuesday, bringing more moisture and shower activity along with gradually strengthening easterly winds. $$ AMZ711-232015- Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N- 351 AM AST Sun Aug 23 2026 .TODAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 7 seconds. Isolated showers early this morning. Scattered showers late this morning, then isolated showers this afternoon. .TONIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas around 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 6 seconds. .MONDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 6 seconds. Scattered showers in the morning. .MONDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas around 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 7 seconds. Scattered showers after midnight. .TUESDAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 7 seconds. Scattered showers. .TUESDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 6 seconds. Scattered showers in the evening, then numerous showers after midnight. .WEDNESDAY...East winds 10 to 15 knots. Seas 3 to 5 feet, occasionally to 6 feet. .WEDNESDAY NIGHT...East winds around 15 knots. Seas 4 to 5 feet, occasionally to 6 feet. Scattered showers. .THURSDAY...East winds around 15 knots. Seas 4 to 5 feet, occasionally to 6 feet. Scattered showers in the morning. .THURSDAY NIGHT...East winds around 15 knots. Seas 4 to 5 feet, occasionally to 6 feet. $$ AMZ712-232015- Coastal Waters of Northern Puerto Rico out 10 NM- 351 AM AST Sun Aug 23 2026 ...SMALL CRAFT SHOULD EXERCISE CAUTION... .TODAY...East winds 5 to 10 knots with gusts up to 20 knots, increasing to 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 7 seconds. Isolated showers early this morning. Scattered showers late this morning and afternoon. Isolated thunderstorms this afternoon. .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. Scattered showers after midnight. .MONDAY...East winds 10 to 15 knots with gusts up to 20 knots, increasing to 15 to 20 knots with gusts up to 30 knots in the afternoon. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 6 seconds. Scattered showers in the morning. .MONDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to 15 knots after midnight. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 6 seconds. .TUESDAY...East winds 10 to 15 knots, increasing to 15 to 20 knots in the afternoon. Seas around 3 feet. Wave Detail: East 3 feet at 7 seconds. Scattered showers. .TUESDAY NIGHT...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 6 seconds. .WEDNESDAY...East winds 10 to 15 knots, increasing to 15 to 20 knots in the afternoon. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers in the morning. .WEDNESDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to 15 knots after midnight. Seas around 4 feet, occasionally to 5 feet. Scattered showers. .THURSDAY...East winds 10 to 15 knots, increasing to 15 to 20 knots in the afternoon. Seas around 4 feet, occasionally to 5 feet. Scattered showers in the morning. .THURSDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to 15 knots after midnight. Seas 4 to 5 feet, occasionally to 6 feet. Winds and seas higher in and near thunderstorms. $$ AMZ716-232015- Coastal Waters from Cabo San Juan to the waters between Anegada Island and Virgin Gorda and North 10 NM- 351 AM AST Sun Aug 23 2026 .TODAY...East winds around 15 knots with gusts up to 20 knots. Seas around 3 feet. Wave Detail: East 3 feet at 5 seconds. Isolated showers this morning, then numerous showers with isolated thunderstorms early this afternoon. Scattered showers late. .TONIGHT...East winds around 15 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 6 seconds. Scattered showers. .MONDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas around 3 feet. Wave Detail: East 3 feet at 5 seconds. Scattered showers in the morning. .MONDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 6 seconds. Scattered showers. .TUESDAY...East winds around 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 5 seconds. Scattered showers. .TUESDAY NIGHT...East winds around 15 knots with gusts up to 25 knots. Seas around 3 feet. Wave Detail: East 3 feet at 5 seconds. Numerous showers. .WEDNESDAY...East winds 10 to 15 knots. Seas 2 to 3 feet. .WEDNESDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers. .THURSDAY...East winds around 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers in the morning. .THURSDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Winds and seas higher in and near thunderstorms. $$ AMZ723-232015- Anegada Passage east of Virgin Gorda and Saint Croix south to 17N- 351 AM AST Sun Aug 23 2026 .TODAY...East winds around 15 knots with gusts up to 25 knots. Seas around 4 feet, occasionally to 5 feet. Wave Detail: Northeast 4 feet at 7 seconds. Isolated showers early this morning. .TONIGHT...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 7 seconds. Scattered showers. .MONDAY...East winds around 15 knots with gusts up to 20 knots. Seas around 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 7 seconds. .MONDAY NIGHT...East winds around 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. Scattered showers in the evening. .TUESDAY...East winds around 15 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 6 seconds. Scattered showers. .TUESDAY 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 5 seconds. Scattered showers. .WEDNESDAY...East winds 10 to 15 knots. Seas around 4 feet, occasionally to 5 feet. .WEDNESDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. Scattered showers. .THURSDAY...East winds around 15 knots. Seas 4 to 5 feet, occasionally to 6 feet. .THURSDAY NIGHT...East winds around 15 knots. Seas 4 to 5 feet, occasionally to 6 feet. Scattered showers. $$ AMZ726-232015- Coastal waters east of Puerto Rico, around Vieques, and around and just north of Culebra and Saint John- 351 AM AST Sun Aug 23 2026 .TODAY...East winds around 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 6 seconds. Isolated showers this morning. Numerous showers with isolated thunderstorms early this afternoon, then scattered showers late. .TONIGHT...East winds around 15 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 6 seconds. Scattered showers. .MONDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 6 seconds. Scattered showers in the morning. .MONDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas around 3 feet. Wave Detail: East 3 feet at 6 seconds. Scattered showers. .TUESDAY...East winds around 15 knots with gusts up to 20 knots. Seas around 3 feet. Wave Detail: East 3 feet at 6 seconds. Scattered showers in the morning. .TUESDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 5 seconds. Numerous showers. .WEDNESDAY...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers in the morning. .WEDNESDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. .THURSDAY...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers in the afternoon. .THURSDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Winds and seas higher in and near thunderstorms. $$ AMZ733-232015- Caribbean waters of Puerto Rico from 10 NM to 17N, including the coastal waters of Saint Croix- 351 AM AST Sun Aug 23 2026 .TODAY...East winds around 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. Isolated showers. .TONIGHT...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. .MONDAY...East winds around 15 knots with gusts up to 25 knots. Seas around 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 6 seconds. Scattered showers in the morning. .MONDAY NIGHT...East winds around 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. .TUESDAY...East winds around 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. Scattered showers in the afternoon. .TUESDAY NIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 5 seconds. Scattered showers. .WEDNESDAY...East winds 10 to 15 knots, increasing to 15 to 20 knots in the afternoon. Seas around 4 feet, occasionally to 5 feet. .WEDNESDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. Scattered showers. .THURSDAY...East winds 15 to 20 knots. Seas around 4 feet, occasionally to 5 feet. .THURSDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. $$ AMZ735-232015- Coastal Waters of Southern Puerto Rico out 10 NM- 351 AM AST Sun Aug 23 2026 .TODAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas around 3 feet. Wave Detail: Southeast 3 feet at 6 seconds. Isolated showers. .TONIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 3 feet at 6seconds. .MONDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 4 feet at 6 seconds. .MONDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 3 feet at 6 seconds. .TUESDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 3 feet at 6 seconds. .TUESDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas around 3 feet. Wave Detail: Southeast 3 feet at 6 seconds. .WEDNESDAY...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers in the morning. .WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. .THURSDAY...East winds 10 to 15 knots, increasing to 15 to 20 knots in the afternoon. Seas 3 to 4 feet, occasionally to 5 feet. .THURSDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. $$ AMZ741-232015- Mona Passage Southward to 17N- 351 AM AST Sun Aug 23 2026 .TODAY...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 7 seconds. Isolated showers this afternoon. .TONIGHT...East winds 10 to 15 knots, increasing to 15 to 20 knots after midnight. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 7 seconds. .MONDAY...East winds 15 to 20 knots, diminishing to 10 to 15 knots in the afternoon. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 7 seconds. Scattered showers. .MONDAY NIGHT...East winds 10 to 15 knots, increasing to 15 to 20 knots after midnight. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: Southeast 4 feet at 6 seconds and northeast 1 foot at 7 seconds. .TUESDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: East 4 feet at 7 seconds. .TUESDAY NIGHT...East winds 10 to 15 knots, increasing to 15 to 20 knots after midnight. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 7 seconds. .WEDNESDAY...East winds 15 to 20 knots, diminishing to 10 to 15 knots in the afternoon. Seas 3 to 4 feet, occasionally to 5 feet. .WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 5 feet, occasionally to 6 feet. .THURSDAY...East winds 10 to 15 knots. Seas 3 to 5 feet, occasionally to 6 feet. .THURSDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet. $$ AMZ742-232015- Coastal Waters of Northwestern Puerto Rico out 10 NM- 351 AM AST Sun Aug 23 2026 .TODAY...East winds around 5 knots, becoming northeast late. Seas 2 to 3 feet. Wave Detail: Northeast 2 feet at 6 seconds and south 1 foot at 5 seconds. Scattered showers with isolated thunderstorms early this afternoon. Numerous showers with isolated thunderstorms late. .TONIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: Northeast 2 feet at 6 seconds and south 1 foot at 5 seconds. Scattered showers in the evening. .MONDAY...East winds 5 to 10 knots, becoming northeast in the afternoon. Seas 2 to 3 feet. Wave Detail: Northeast 2 feet at 6 seconds and south 1 foot at 5 seconds. Numerous showers in the afternoon. .MONDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: Northeast 2 feet at 6 seconds and south 1 foot at 5 seconds. Scattered showers in the evening. .TUESDAY...East winds 5 to 10 knots, diminishing to around 5 knots in the afternoon. Seas around 2 feet. Wave Detail: Northeast 2 feet at 6 seconds and south 1 foot at 5 seconds. Numerous showers in the afternoon. .TUESDAY NIGHT...East winds around 5 knots. Seas around 2 feet. Wave Detail: South 1 foot at 5 seconds and northeast 1 foot at 6 seconds. Scattered showers in theevening. .WEDNESDAY...Northeast winds 5 to 10 knots. Seas around 2 feet. Scattered showers in the afternoon. .WEDNESDAY NIGHT...Northeast winds 10 to 15 knots. Seas 2 to 3 feet. .THURSDAY...Northeast winds 10 to 15 knots, becoming east 5 to 10 knots in the afternoon. Seas 2 to 3 feet. Scattered showers in the afternoon. .THURSDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet. Winds and seas higher in and near thunderstorms. $$ AMZ745-232015- Coastal Waters of Southwestern Puerto Rico out 10 NM- 351 AM AST Sun Aug 23 2026 .TODAY...East winds 5 to 10 knots, becoming southeast 10 to 15 knots with gusts up to 20 knots early this afternoon, then becoming east 5 to 10 knots with gusts up to 20 knots late. Seas around 2 feet. Wave Detail: Southeast 2 feet at 5 seconds. Isolated showers early this afternoon. Scattered showers with isolated thunderstorms late. .TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at 5 seconds. .MONDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 5 seconds. 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. Wave Detail: Southeast 2 feet at 5 seconds. .TUESDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 5 seconds. Scattered showers in the afternoon. .TUESDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 5 seconds. .WEDNESDAY...East winds 5 to 10 knots, becoming southeast 10 to 15 knots in the afternoon. Seas around 2 feet. Scattered showers in the afternoon. .WEDNESDAY NIGHT...Northeast winds 5 to 10 knots. Seas around 2 feet. .THURSDAY...East winds 5 to 10 knots, becoming southeast in the afternoon. Seas around 2 feet. Scattered showers in the afternoon. .THURSDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet. Winds and seas higher in and near thunderstorms. $$