FZCA52 TJSJ 150737 CWFSJU Coastal Waters Forecast National Weather Service San Juan PR 337 AM AST Wed Apr 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- 337 AM AST Wed Apr 15 2026 .Synopsis for Puerto Rico and the U.S. Virgin Islands Waters... A surface high pressure system over the eastern to central Atlantic, interacting with surface trough, will promote light to gentle winds during the morning hours then will turn more gentl to moderate from the east- southeast. Pulses of northerly swell spreading across the Atlantic waters are maintaining seas around 5 to 6 feet across exposed areas, where small craft should exercise caution over the next several days. The combination of the front and the trough is increasing showers and thunderstorms across the local waters, creating locally hazardous marine conditions through at least teh rest of the workweek. $$ AMZ711-152015- Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N- 337 AM AST Wed Apr 15 2026 ...SMALL CRAFT SHOULD EXERCISE CAUTION... .TODAY...Southeast winds 5 to 10 knots. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: North 5 feet at 9 seconds and southeast 4 feet at 6 seconds. Scattered showers. Isolated thunderstorms this afternoon. .TONIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: Northeast 5 feet at 9 seconds and east 4 feet at 8 seconds. Scattered showers. .THURSDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: East 4 feet at 8 seconds and northeast 4 feet at 9 seconds. Numerous showers, mainly in the morning. .THURSDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas around 5 feet, occasionally to 6 feet. Wave Detail: East 4 feet at 8 seconds and northeast 3 feet at 9 seconds. Scattered showers after midnight. .FRIDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 4 feet at 8 seconds and north 3 feet at 10 seconds. Scattered showers. .FRIDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 8 seconds and north 2 feet at 11 seconds. Scattered showers in the evening, then numerous showers after midnight. .SATURDAY...East winds 10 to 15 knots. Seas 4 to 5 feet, occasionally to 6 feet. Scattered showers. .SATURDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Scattered showers. .SUNDAY...East winds 15 to 20 knots. Seas 5 to 6 feet, occasionally to 8 feet. Scattered showers. .SUNDAY NIGHT...East winds 15 to 20 knots. Seas 5 to 6 feet, occasionally to 8 feet. Scattered showers. Winds and seas higher in and near thunderstorms. $$ AMZ712-152015- Coastal Waters of Northern Puerto Rico out 10 NM- 337 AM AST Wed Apr 15 2026 ...SMALL CRAFT SHOULD EXERCISE CAUTION... .TODAY...East winds 5 to 10 knots. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: North 5 feet at 9 seconds. Scattered showers this morning. Isolated thunderstorms late this morning and afternoon. Numerous showers this afternoon. .TONIGHT...East winds 5 to 10 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast 5 feet at 9 seconds. Scattered showers. .THURSDAY...East winds 5 to 10 knots, increasing to 10 to 15 knots in the afternoon. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast 5 feet at 9 seconds. Scattered showers in the morning, then numerous showers in the afternoon. .THURSDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast 5 feet at 9 seconds. Numerous showers in the evening. .FRIDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast 4 feet at 10 seconds and east 3 feet at 8 seconds. Numerous showers, mainly in the morning. .FRIDAY NIGHT...East winds 5 to 10 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast 4 feet at 8 seconds and north 2 feet at 10 seconds. Numerous showers, mainly in the evening. .SATURDAY...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 morning, then numerous showers in the afternoon. .SATURDAY NIGHT...East winds 10 to 15 knots. Seas around 4 feet, occasionally to 5 feet. Scattered showers. .SUNDAY...East winds 10 to 15 knots, diminishing to 5 to 10 knots in the afternoon. Seas 4 to 5 feet, occasionally to 6 feet. Scattered showers. .SUNDAY NIGHT...East winds 10 to 15 knots, diminishing to 5 to 10 knots after midnight. Seas 4 to 5 feet, occasionally to 6 feet. Scattered showers. Winds and seas higher in and near thunderstorms. $$ AMZ716-152015- Coastal Waters from Cabo San Juan to the waters between Anegada Island and Virgin Gorda and North 10 NM- 337 AM AST Wed Apr 15 2026 .TODAY...Southeast winds 5 to 10 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast 4 feet at 9 seconds and southeast 2 feet at 5 seconds. Isolated thunderstorms this morning. Scattered showers. .TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast 4 feet at 9 seconds and east 3 feet at 4 seconds. Scattered showers. .THURSDAY...East winds around 15 knots with gusts up to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast 4 feet at 9 seconds and southeast 3 feet at 5 seconds. Numerous showers, mainly in the morning. .THURSDAY NIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast 4 feet at 9 seconds and east 3 feet at 6 seconds. Scattered showers in the evening, then numerous showers after midnight. .FRIDAY...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 6 seconds and northeast 3 feet at 9 seconds. Scattered showers in the morning, then numerous 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 4 feet at 5 seconds and north 2 feet at 10 seconds. Numerous showers. .SATURDAY...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Numerous showers, mainly in the morning. .SATURDAY NIGHT...East winds around 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Numerous showers. .SUNDAY...East winds around 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Numerous showers, mainly in the morning. .SUNDAY NIGHT...East winds around 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers. Winds and seas higher in and near thunderstorms. $$ AMZ723-152015- Anegada Passage east of Virgin Gorda and Saint Croix south to 17N- 337 AM AST Wed Apr 15 2026 .TODAY...East winds around 10 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 3 feet at 5 seconds and northeast 3 feet at 9 seconds. Isolated thunderstorms early this morning. Scattered showers. .TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 4 feet at 5 seconds and northeast 3 feet at 9 seconds. Scattered showers after midnight. .THURSDAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas around 5 feet, occasionally to 6 feet. Wave Detail: East 4 feet at 6 seconds and northeast 3 feet at 10 seconds. Numerous showers, mainly in the morning. .THURSDAY NIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas around 5 feet, occasionally to 6 feet. Wave Detail: East 4 feet at 6 seconds and northeast 3 feet at 10 seconds. Scattered showers after midnight. .FRIDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 4 feet at 6 seconds and northeast 2 feet at 10 seconds. Scattered showers. .FRIDAY NIGHT...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 2 feet at 10 seconds. Numerous showers, mainly in the evening. .SATURDAY...East winds around 15 knots. Seas 4 to 5 feet, occasionally to 6 feet. Scattered showers. .SATURDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. Scattered showers. .SUNDAY...East winds 10 to 15 knots. Seas 4 to 5 feet, occasionally to 6 feet. Scattered showers. .SUNDAY NIGHT...East winds around 15 knots. Seas 4 to 5 feet, occasionally to 6 feet. Scattered showers. Winds and seas higher in and near thunderstorms. $$ AMZ726-152015- Coastal waters east of Puerto Rico, around Vieques, and around and just north of Culebra and Saint John- 337 AM AST Wed Apr 15 2026 .TODAY...Southeast winds 5 to 10 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast 3 feet at 9 seconds and southeast 2 feet at 5 seconds. Numerous showers with isolated thunderstorms this morning, then scattered showers this afternoon. .TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 3 feet at 5 seconds and northeast 3 feet at 9 seconds. Scattered showers. .THURSDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 6 seconds and northeast 2 feet at 9 seconds. Scattered showers. .THURSDAY NIGHT...East winds 10 to 15 knots, increasing to 15 to 20 knots after midnight. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 7 seconds. Scattered showers in the evening, then numerous showers after midnight. .FRIDAY...East winds 15 to 20 knots, diminishing to 10 to 15 knots in the afternoon. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 7 seconds. Scattered showers in the morning, then numerous showers in the afternoon. .FRIDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 7 seconds. Numerous showers. .SATURDAY...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Numerous showers. .SATURDAY NIGHT...East winds around 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Numerous showers. .SUNDAY...East winds around 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Numerous showers, mainly in the morning. .SUNDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers. Winds and seas higher in and near thunderstorms. $$ AMZ733-152015- Caribbean waters of Puerto Rico from 10 NM to 17N, including the coastal waters of Saint Croix- 337 AM AST Wed Apr 15 2026 .TODAY...East winds 5 to 10 knots. Seas around 3 feet. Wave Detail: Southeast 2 feet at 6 seconds and east 2 feet at 9 seconds. Numerous showers early this morning. Isolated thunderstorms this morning. Scattered 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: Southeast 3 feet at 6 seconds and east 2 feet at 9 seconds. Scattered showers. .THURSDAY...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 6 seconds and northeast 2 feet at 9 seconds. Numerous showers, mainly in the morning. .THURSDAY 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 6 seconds and northeast 2 feet at 9 seconds. Scattered showers. .FRIDAY...East winds 10 to 15 knots, increasing to 15 to 20 knots in the afternoon. Seas around 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 6 seconds and northeast 2 feet at 9 seconds. Scattered showers in the morning, then numerous showers in the afternoon. .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 4 feet at 7 seconds. Numerous showers, mainly in the evening. .SATURDAY...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers. .SATURDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers. .SUNDAY...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers. .SUNDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers. Winds and seas higher in and near thunderstorms. $$ AMZ735-152015- Coastal Waters of Southern Puerto Rico out 10 NM- 337 AM AST Wed Apr 15 2026 .TODAY...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 6 seconds. Isolated showers early this morning. Isolated thunderstorms late this morning. Scattered showers late this morning and afternoon. .TONIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 6 seconds. Scattered showers. .THURSDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 6 seconds. Scattered showers. .THURSDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas around 3 feet. Wave Detail: East 3 feet at 6 seconds. Numerous showers. .FRIDAY...East winds 10 to 15 knots, increasing to 15 to 20 knots in the afternoon. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 6 seconds. Scattered showers. .FRIDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 6 seconds. .SATURDAY...East winds around 10 knots. Seas 2 to 3 feet. Scattered showers. .SATURDAY NIGHT...East winds 5 to 10 knots, increasing to 10 to 15 knots after midnight. Seas 2 to 3 feet. .SUNDAY...East winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Scattered showers. .SUNDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet. Scattered showers. Winds and seas higher in and near thunderstorms. $$ AMZ741-152015- Mona Passage Southward to 17N- 337 AM AST Wed Apr 15 2026 .TODAY...East winds 5 to 10 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: North 4 feet at 9 seconds and southeast 2 feet at 6 seconds. Numerous showers with isolated thunderstorms early this morning, then isolated showers late this morning and afternoon. .TONIGHT...East winds 5 to 10 knots, increasing to 10 to 15 knots with gusts up to 20 knots after midnight. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: North 4 feet at 9 seconds and southeast 3 feet at 6 seconds. Scattered showers in the evening. .THURSDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: North 4 feet at 9 seconds and southeast 3 feet at 6 seconds. Numerous showers in the morning. .THURSDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas around 4 feet, occasionally to 5 feet. Wave Detail: Southeast 3 feet at 6 seconds and northeast 3 feet at 9 seconds. Scattered showers in the evening. .FRIDAY...East winds 10 to 15 knots, increasing to 15 to 20 knots in the afternoon. Seas around 4 feet, occasionally to 5 feet. Wave Detail: Southeast 3 feet at 6 seconds and north 3 feet at 9 seconds. Numerous showers, mainly in the morning. .FRIDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 3 feet at 6 seconds and north 2 feet at 9 seconds. Scattered showers in the evening. .SATURDAY...East winds 10 to 15 knots, diminishing to 5 to 10 knots in the afternoon. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers in the afternoon. .SATURDAY NIGHT...East winds 5 to 10 knots, increasing to 10 to 15 knots after midnight. Seas around 3 feet. .SUNDAY...East winds 10 to 15 knots, diminishing to 5 to 10 knots in the afternoon. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers. .SUNDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Winds and seas higher in and near thunderstorms. $$ AMZ742-152015- Coastal Waters of Northwestern Puerto Rico out 10 NM- 337 AM AST Wed Apr 15 2026 .TODAY...East winds around 5 knots, becoming southeast around 5 knots this afternoon. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: North 5 feet at 9 seconds and south 1 foot at 6 seconds. Numerous showers with isolated thunderstorms early this afternoon. Scattered showers with isolated thunderstorms late. .TONIGHT...East winds 5 to 10 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: North 5 feet at 9 seconds and south 1 foot at 3 seconds. .THURSDAY...East winds around 5 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: North 4 feet at 9 seconds and south 1 foot at 4 seconds. Numerous showers in the afternoon. .THURSDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: North 4 feet at 9 seconds and south 1 foot at 6 seconds. .FRIDAY...East winds 5 to 10 knots, diminishing to around 5 knots in the afternoon. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: North 3 feet at 9 seconds and south 1 foot at 6 seconds. Showers in the afternoon. .FRIDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: North 3 feet at 9 seconds and southeast 2 feet at 7 seconds. Scattered showers in the evening. .SATURDAY...East winds around 5 knots. Seas 2 to 3 feet. Numerous showers in the afternoon. .SATURDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. .SUNDAY...East winds 5 to 10 knots. Seas 2 to 3 feet. Numerous showers in the afternoon. .SUNDAY NIGHT...East winds around 5 knots. Seas 2 to 3 feet. Winds and seas higher in and near thunderstorms. $$ AMZ745-152015- Coastal Waters of Southwestern Puerto Rico out 10 NM- 337 AM AST Wed Apr 15 2026 .TODAY...East winds 5 to 10 knots, becoming southeast this afternoon. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 2 feet at 4 seconds. Isolated showers this afternoon. .TONIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 5 seconds. Scattered showers after midnight. .THURSDAY...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. Scattered showers. .THURSDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 6 seconds. .FRIDAY...East winds 5 to 10 knots, increasing to 10 to 15 knots in the afternoon. Gusts up to 25 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 6 seconds. Numerous showers in the afternoon. .FRIDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 6 seconds. Scattered showers in the evening. .SATURDAY...East winds 5 to 10 knots. Seas 2 to 3 feet. Scattered showers in the afternoon. .SATURDAY NIGHT...East winds 5 to 10 knots, increasing to 10 to 15 knots after midnight. Seas around 2 feet. .SUNDAY...East winds 10 to 15 knots. Seas 2 to 3 feet. Scattered showers in the afternoon. .SUNDAY NIGHT...East winds 10 to 15 knots. Seas around 2 feet. $$