FZCA52 TJSJ 210736 CWFSJU Coastal Waters Forecast National Weather Service San Juan PR 336 AM AST Sun Jun 21 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. AMZ700-212015- 336 AM AST Sun Jun 21 2026 .Synopsis for Puerto Rico and the U.S. Virgin Islands Waters.... A tropical wave moving across the Caribbean Sea today into Monday will increase moisture across the region, leading to a higher likelihood of showers and isolated thunderstorms over the regional waters. A broad surface high pressure system building across the central Atlantic will continue to promote moderate to locally fresh easterly to east-southeasterly winds over the next several days. These conditions will maintain choppy seas across the local waters and Caribbean passages, and small craft should exercise caution. Meanwhile, moderate to occasionally high concentrations of Saharan dust will persist through the weekend and into early next week, resulting in hazy skies, reduced visibilities, and degraded air quality. $$ AMZ711-212015- Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N- 336 AM AST Sun Jun 21 2026 ...SMALL CRAFT SHOULD EXERCISE CAUTION... .TODAY...East winds 15 to 20 knots with gusts up to 30 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 6 seconds and northeast 1 foot at 11 seconds. Scattered showers with isolated thunderstorms. .TONIGHT...East winds 15 to 20 knots with gusts up to 30 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 7 seconds and northeast 1 foot at 10 seconds. .MONDAY...East winds 15 to 20 knots with gusts up to 30 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 7 seconds and northeast 1 foot at 10 seconds. .MONDAY NIGHT...East winds 15 to 20 knots with gusts up to 30 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: East 5 feet at 7 seconds and northeast 1 foot at 10 seconds. .TUESDAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas around 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 7 seconds and northeast 1 foot at 10 seconds. .TUESDAY NIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas around 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 7 seconds and northeast 1 foot at 12 seconds. Scattered showers. .WEDNESDAY...East winds 10 to 15 knots. Seas 4 to 5 feet, occasionally to 6 feet. .WEDNESDAY NIGHT...East winds around 15 knots. Seas 4 to 5 feet, occasionally to 6 feet. .THURSDAY...East winds 15 to 20 knots. Seas around 4 feet, occasionally to 5 feet. .THURSDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. Winds and seas higher in and near thunderstorms. $$ AMZ712-212015- Coastal Waters of Northern Puerto Rico out 10 NM- 336 AM AST Sun Jun 21 2026 ...SMALL CRAFT SHOULD EXERCISE CAUTION... .TODAY...East winds 10 to 15 knots with gusts up to 25 knots, increasing to 15 to 20 knots with gusts up to 30 knots this afternoon. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 6 seconds and northeast 1 foot at 11 seconds. Isolated thunderstorms. Numerous showers early this morning, then scattered showers late this morning and afternoon. .TONIGHT...East winds 15 to 20 knots with gusts up to 30 knots, diminishing to 10 to 15 knots with gusts up to 20 knots after midnight. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 6 seconds and northeast 1 foot at 11 seconds. .MONDAY...East winds 15 to 20 knots, increasing to 20 to 25 knots in the afternoon. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 6 seconds and northeast 1 foot at 10 seconds. .MONDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to 15 knots after midnight. Gusts up to 30 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 6 seconds and northeast 1 foot at 10 seconds. .TUESDAY...East winds 15 to 20 knots with gusts up to 30 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 6 seconds and northeast 1 foot at 10 seconds. .TUESDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to 15 knots after midnight. Gusts up to 30 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 6 seconds and northeast 1 foot at 12 seconds. Scattered showers. .WEDNESDAY...East winds 10 to 15 knots, increasing to 15 to 20 knots in the afternoon. Seas 4 to 5 feet, occasionally to 6 feet. Scattered showers in the morning. .WEDNESDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to 15 knots after midnight. Seas 3 to 5 feet, occasionally to 6 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 5 feet, occasionally to 6 feet. Winds and seas higher in and near thunderstorms. $$ AMZ716-212015- Coastal Waters from Cabo San Juan to the waters between Anegada Island and Virgin Gorda and North 10 NM- 336 AM AST Sun Jun 21 2026 ...SMALL CRAFT SHOULD EXERCISE CAUTION... .TODAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 5 seconds and north 1 foot at 11 seconds. Numerous showers with isolated thunderstorms this morning, then isolated showers this afternoon. .TONIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 5 seconds and northeast 1 foot at 11 seconds. .MONDAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 5 seconds and northeast 1 foot at 10 seconds. .MONDAY NIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 5 seconds and north 1 foot at 10 seconds. .TUESDAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: East 4 feet at 5 seconds and north 1 foot at 10 seconds. .TUESDAY NIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: East 4 feet at 6 seconds and northeast 1 foot at 10 seconds. Scattered showers. .WEDNESDAY...East winds 15 to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers in the morning. .WEDNESDAY NIGHT...East winds around 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. .THURSDAY...East winds 15 to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. .THURSDAY NIGHT...East winds around 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Winds and seas higher in and near thunderstorms. $$ AMZ723-212015- Anegada Passage east of Virgin Gorda and Saint Croix south to 17N- 336 AM AST Sun Jun 21 2026 ...SMALL CRAFT SHOULD EXERCISE CAUTION... .TODAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: East 5 feet at 6 seconds and northeast 1 foot at 11 seconds. Isolated showers and thunderstorms early this morning, then isolated showers late this morning and early afternoon. .TONIGHT...East winds 15 to 20 knots with gusts up to 30 knots. Seas around 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 6 seconds and northeast 1 foot at 11 seconds. Scattered showers after midnight. .MONDAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas around 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 6 seconds and northeast 1 foot at 10 seconds. .MONDAY NIGHT...East winds 15 to 20 knots with gusts up to 30 knots. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at 6 seconds and northeast 1 foot at 10 seconds. Scattered showers after midnight. .TUESDAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at 6 seconds and northeast 1 foot at 10 seconds. .TUESDAY NIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas around 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 7 seconds and northeast 1 foot at 12 seconds. .WEDNESDAY...East winds 15 to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. .WEDNESDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. .THURSDAY...East winds 15 to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. .THURSDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. Winds and seas higher in and near thunderstorms. $$ AMZ726-212015- Coastal waters east of Puerto Rico, around Vieques, and around and just north of Culebra and Saint John- 336 AM AST Sun Jun 21 2026 ...SMALL CRAFT SHOULD EXERCISE CAUTION... .TODAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 6 seconds. Numerous showers with isolated thunderstorms this morning, then isolated showers this afternoon. .TONIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 6 seconds. .MONDAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 6 seconds. .MONDAY NIGHT...East winds 15 to 20 knots with gusts up to 30 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 6 seconds. Scattered showers after midnight. .TUESDAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 6 seconds. Scattered showers in the afternoon. .TUESDAY NIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 7 seconds. Scattered showers after midnight. .WEDNESDAY...East winds 15 to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers in the morning. .WEDNESDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. .THURSDAY...East winds 15 to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. .THURSDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Winds and seas higher in and near thunderstorms. $$ AMZ733-212015- Caribbean waters of Puerto Rico from 10 NM to 17N, including the coastal waters of Saint Croix- 336 AM AST Sun Jun 21 2026 ...SMALL CRAFT SHOULD EXERCISE CAUTION... .TODAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas around 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 7 seconds. Scattered showers this morning. Isolated thunderstorms until late afternoon. Isolated showers this afternoon. .TONIGHT...East winds 15 to 20 knots with gusts up to 30 knots. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at 7 seconds. Scattered showers after midnight. .MONDAY...East winds 15 to 20 knots with gusts up to 30 knots. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at 7 seconds. Scattered showers in the morning. .MONDAY NIGHT...East winds around 20 knots with gusts up to 30 knots. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at 7 seconds. Scattered showers after midnight. .TUESDAY...East winds 15 to 20 knots with gusts up to 30knots. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at 7 seconds. Scattered showers in the morning. .TUESDAY NIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at 7 seconds. Scattered showers. .WEDNESDAY...East winds 15 to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. Scattered showers in the morning. .WEDNESDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. .THURSDAY...East winds 15 to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. .THURSDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. Winds and seas higher in and near thunderstorms. $$ AMZ735-212015- Coastal Waters of Southern Puerto Rico out 10 NM- 336 AM AST Sun Jun 21 2026 ...SMALL CRAFT SHOULD EXERCISE CAUTION... .TODAY...East winds 10 to 15 knots, increasing to 15 to 20 knots late this morning and afternoon. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 7 seconds. Numerous showers with isolated thunderstorms this morning. Isolated showers this afternoon. .TONIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 7 seconds. Scattered showers in the evening. .MONDAY...East winds 15 to 20 knots with gusts up to 30 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 7 seconds. Scattered showers in the morning. .MONDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to 15 knots after midnight. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 7 seconds. Scattered showers after midnight. .TUESDAY...East winds 15 to 20 knots with gusts up to 30 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 7 seconds. .TUESDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to 15 knots after midnight. Gusts up to 30 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 7 seconds. Scattered showers. .WEDNESDAY...East winds 10 to 15 knots. Seas 3 to 5 feet, occasionally to 6 feet. .WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. .THURSDAY...East winds 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet. .THURSDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 5 feet, occasionally to 6 feet. Winds and seas higher in and near thunderstorms. $$ AMZ741-212015- Mona Passage Southward to 17N- 336 AM AST Sun Jun 21 2026 ...SMALL CRAFT SHOULD EXERCISE CAUTION... .TODAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 7 seconds and northeast 1 foot at 11 seconds. Scattered showers with isolated thunderstorms. .TONIGHT...East winds 15 to 20 knots with gusts up to 30 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at 7 seconds and northeast 1 foot at 11 seconds. .MONDAY...East winds 15 to 20 knots with gusts up to 30 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at 7 seconds and northeast 1 foot at 10 seconds. Scattered showers. .MONDAY NIGHT...East winds 15 to 20 knots with gusts up to 30 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at 7 seconds and northeast 1 foot at 10 seconds. .TUESDAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at 7 seconds and northeast 1 foot at 10 seconds. Scattered showers in the morning. .TUESDAY NIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at 7 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 4 to 6 feet, occasionally to 8 feet. .WEDNESDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. .THURSDAY...East winds 15 to 20 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. Winds and seas higher in and near thunderstorms. $$ AMZ742-212015- Coastal Waters of Northwestern Puerto Rico out 10 NM- 336 AM AST Sun Jun 21 2026 .TODAY...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: Northeast 3 feet at 6 seconds and northeast 1 foot at 11 seconds. Scattered showers late this morning. Isolated thunderstorms late this morning and afternoon. Showers this afternoon. .TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: Northeast 3 feet at 6 seconds and northeast 1 foot at 11 seconds. Scattered showers in the evening. .MONDAY...East winds 5 to 10 knots, becoming northeast 10 to 15 knots with gusts up to 25 knots in the afternoon. Seas 2 to 3 feet. Wave Detail: East 3 feet at 7 seconds and northeast 1 foot at 10 seconds. Numerous showers in the afternoon. .MONDAY NIGHT...East winds 10 to 15 knots with gusts up to 30 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast 4 feet at 7 seconds and northeast 1 foot at 10 seconds. .TUESDAY...Northeast winds 10 to 15 knots with gusts up to 25 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast 3 feet at 7 seconds and northeast 1 foot at 10 seconds. Numerous showers in the afternoon. .TUESDAY NIGHT...Northeast winds 15 to 20 knots, becoming east 10 to 15 knots after midnight. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast 4 feet at 6 seconds and northeast 1 foot at 10 seconds. Scattered showers after midnight. .WEDNESDAY...East winds 10 to 15 knots, diminishing to 5 to 10 knots in the afternoon. Seas 2 to 3 feet. Scattered showers in the afternoon. .WEDNESDAY NIGHT...East winds 5 to 10 knots, increasing to 10 to 15 knots after midnight. Seas 2 to 3 feet. .THURSDAY...East winds 5 to 10 knots. Seas 2 to 3 feet. .THURSDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. Winds and seas higher in and near thunderstorms. $$ AMZ745-212015- Coastal Waters of Southwestern Puerto Rico out 10 NM- 336 AM AST Sun Jun 21 2026 ...SMALL CRAFT SHOULD EXERCISE CAUTION... .TODAY...East winds 5 to 10 knots, increasing to 15 to 20 knots with gusts up to 25 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 5 seconds. Isolated showers late this morning. Scattered showers with isolated thunderstorms early this afternoon, then isolated showers late. .TONIGHT...East winds 15 to 20 knots, diminishing to 10 to 15 knots after midnight. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 3 feet at 5 seconds. .MONDAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 6 seconds. Scattered showers in the afternoon. .MONDAY NIGHT...East winds 10 to 15 knots, diminishing to 5 to 10 knots after midnight. Gusts up to 25 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 7 seconds. .TUESDAY...Northeast winds 5 to 10 knots, becoming east 10 to 15 knots with gusts up to 20 knots in the afternoon. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 7 seconds. Scattered showers in the afternoon. .TUESDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots, diminishing to 5 to 10 knots after midnight. Seas 2 to 3 feet. Wave Detail: East 3 feet at 6 seconds. .WEDNESDAY...East winds 5 to 10 knots, becoming southeast 10 to 15 knots in the afternoon. Seas 2 to 3 feet. .WEDNESDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. .THURSDAY...East winds 10 to 15 knots, becomingsoutheast 15 to 20 knots in the afternoon. Seas 2 to 3 feet. .THURSDAY NIGHT...East winds 15 to 20 knots, diminishing to 5 to 10 knots after midnight. Seas 2 to 3 feet. Winds and seas higher in and near thunderstorms. $$