FZCA52 TJSJ 232007 CWFSJU Coastal Waters Forecast National Weather Service San Juan PR 407 PM 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. AMZ700-240915- 407 PM AST Sun Aug 23 2026 .Synopsis for Puerto Rico and the U.S. Virgin Islands Waters... A weak tropical wave approaching the Caribbean basin should increase the frequency of showers across the local Caribbean waters and passages this afternoon into the evening. Afterward, another tropical wave is forecast to approach the eastern Caribbean around Tuesday, bringing enhanced shower and thunderstorm activity once again. As winds gradually increase by midweek and become moderate to locally fresh, seas should build to 3-5 feet, occasionally 6 feet, across offshore waters and passages; small craft must exercise caution. $$ AMZ711-240915- Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N- 407 PM AST Sun Aug 23 2026 .TONIGHT...East winds around 15 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 7 seconds and northeast 1 foot at 8 seconds. Isolated showers. .MONDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast 4 feet at 7 seconds. Scattered showers in the morning. .MONDAY NIGHT...East winds around 15 knots with gusts up to 25 knots. Seas around 4 feet, occasionally to 5 feet. Wave Detail: Northeast 4 feet at 7 seconds. Scattered showers after midnight. .TUESDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast 4 feet at 7 seconds. Scattered showers. .TUESDAY NIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 4 feet at 7 seconds. Scattered showers in the evening, then numerous showers after midnight. .WEDNESDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 8 seconds and northeast 1 foot at 13 seconds. .WEDNESDAY NIGHT...East winds around 15 knots with gusts up to 25 knots. Seas 4 to 5 feet, occasionally to 6 feet. Scattered showers. .THURSDAY...East winds 10 to 15 knots. Seas 4 to 5 feet, occasionally to 6 feet. Scattered showers in the morning. .THURSDAY NIGHT...East winds around 15 knots. Seas 4 to 5 feet, occasionally to 6 feet. .FRIDAY...East winds 10 to 15 knots. Seas 4 to 5 feet, occasionally to 6 feet. .FRIDAY NIGHT...East winds around 15 knots. Seas 4 to 5 feet, occasionally to 6 feet. Scattered showers. $$ AMZ712-240915- Coastal Waters of Northern Puerto Rico out 10 NM- 407 PM AST Sun Aug 23 2026 ...SMALL CRAFT SHOULD EXERCISE CAUTION... .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 late this evening and overnight. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast 4 feet at 7 seconds. Isolated showers this evening, then 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: Northeast 4 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 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 6 seconds. Scattered showers. .TUESDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas around 3 feet. Wave Detail: East 3 feet at 6 seconds. .WEDNESDAY...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: Northeast 4 feet at 6 seconds. 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 around 4 feet, occasionally to 5 feet. .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. Scattered showers in the afternoon. .FRIDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to 15 knots after midnight. Seas 4 to 5 feet, occasionally to 6 feet. $$ AMZ716-240915- Coastal Waters from Cabo San Juan to the waters between Anegada Island and Virgin Gorda and North 10 NM- 407 PM AST Sun Aug 23 2026 .TONIGHT...East winds around 15 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 5 seconds and northeast 1 foot at 8 seconds. Scattered showers. .MONDAY...East winds around 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 5 seconds and northeast 1 foot at 8 seconds. Scattered showers in the morning. .MONDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: Northeast 3 feet at 7 seconds. Scattered showers. .TUESDAY...East winds around 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: Northeast 3 feet at 5 seconds. Scattered showers. .TUESDAY NIGHT...East winds around 15 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 5 seconds. Numerous showers. .WEDNESDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas around 3 feet. Wave Detail: Northeast 3 feet at 5 seconds. .WEDNESDAY NIGHT...East winds around 15 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers. .THURSDAY...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers in the morning. .THURSDAY NIGHT...East winds around 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. .FRIDAY...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. .FRIDAY NIGHT...East winds around 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers. $$ AMZ723-240915- Anegada Passage east of Virgin Gorda and Saint Croix south to 17N- 407 PM AST Sun Aug 23 2026 ...SMALL CRAFT SHOULD EXERCISE CAUTION... .TONIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas around 4 feet, occasionally to 5 feet. Wave Detail: Northeast 4 feet at 7 seconds. Scattered showers. .MONDAY...East winds around 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast 4 feet at 7 seconds. .MONDAY NIGHT...East winds around 15 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast 4 feet at 6 seconds. Scattered showers in the evening. .TUESDAY...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 5 seconds. Scattered showers. .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 4 feet at 6 seconds. Scattered showers. .WEDNESDAY...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 1 foot at 15 seconds. .WEDNESDAY NIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas 4 to 5 feet, occasionally to 6 feet. Scattered showers. .THURSDAY...East winds 10 to 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. .FRIDAY...East winds around 15 knots. Seas 4 to 5 feet, occasionally to 6 feet. Scattered showers. .FRIDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. Scattered showers. $$ AMZ726-240915- Coastal waters east of Puerto Rico, around Vieques, and around and just north of Culebra and Saint John- 407 PM AST Sun Aug 23 2026 .TONIGHT...East winds around 15 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 3 feet at 6 seconds. Isolated showers early this evening, then scattered showers late this evening and overnight. .MONDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 3 feet at 5 seconds. Scattered showers in the morning. .MONDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 3 feet at 6 seconds. Scattered showers. .TUESDAY...East winds around 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 3 feet at 5 seconds. Scattered showers in the morning. .TUESDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 4 feet at 5 seconds. Numerous showers. .WEDNESDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 4 feet at 6 seconds. Scattered showers in the morning. .WEDNESDAY NIGHT...Northeast winds 15 to 20 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. .THURSDAY...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers in the afternoon. .THURSDAY NIGHT...East winds around 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. .FRIDAY...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. .FRIDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers. $$ AMZ733-240915- Caribbean waters of Puerto Rico from 10 NM to 17N, including the coastal waters of Saint Croix- 407 PM AST Sun Aug 23 2026 ...SMALL CRAFT SHOULD EXERCISE CAUTION... .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. Isolated showers. .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 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 6 seconds. Scattered showers. .WEDNESDAY...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. .WEDNESDAY NIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas 4 to 5 feet, occasionally to 6 feet. Scattered showers. .THURSDAY...East winds around 15 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. .FRIDAY...East winds around 15 knots. Seas around 4 feet, occasionally to 5 feet. Scattered showers in the afternoon. .FRIDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. Scattered showers. $$ AMZ735-240915- Coastal Waters of Southern Puerto Rico out 10 NM- 407 PM AST Sun Aug 23 2026 .TONIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 3 feet at 6 seconds. Isolated showers. .MONDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 6 seconds. .MONDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 6 seconds. .TUESDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 6 seconds. .TUESDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 6 seconds. .WEDNESDAY...East winds 10 to 15 knots, increasing to 15 to 20 knots in the afternoon. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 6 seconds. Scattered showers in the morning. .WEDNESDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. .THURSDAY...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. .THURSDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. .FRIDAY...East winds 10 to 15 knots, increasing to 15 to 20 knots in the afternoon. Seas 3 to 4 feet, occasionally to 5 feet. .FRIDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers. $$ AMZ741-240915- Mona Passage Southward to 17N- 407 PM AST Sun Aug 23 2026 ...SMALL CRAFT SHOULD EXERCISE CAUTION... .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: Northeast 5 feet at 7 seconds. Isolated showers. .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: Northeast 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 4 feet, occasionally to 5 feet. Wave Detail: Northeast 4 feet at 7 seconds. .TUESDAY...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 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: Northeast 4 feet at 7 seconds. .WEDNESDAY...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: Southeast 5 feet at 6 seconds. .WEDNESDAY NIGHT...East winds 10 to 15 knots, becoming northeast 15 to 20 knots after midnight. Seas 4 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 10 to 15 knots, increasing to 15 to 20 knots after midnight. Seas 3 to 5 feet, occasionally to 6 feet. .FRIDAY...East winds 10 to 15 knots, increasing to 15 to 20 knots in the afternoon. Seas 3 to 5 feet, occasionally to 6 feet. Scattered showers in the morning. .FRIDAY NIGHT...East winds 10 to 15 knots, increasing to 15 to 20 knots after midnight. Seas 3 to 5 feet, occasionally to 6 feet. Scattered showers. $$ AMZ742-240915- Coastal Waters of Northwestern Puerto Rico out 10 NM- 407 PM AST Sun Aug 23 2026 .TONIGHT...East winds 10 to 15 knots with gusts up to 20 knots, diminishing to 5 to 10 knots with gusts up to 20 knots late this evening and overnight. Seas 2 to 3 feet. Wave Detail: Northeast 2 feet at 6 seconds and south 1 foot at 5 seconds. Scattered showers early this evening, then isolated showers late this evening. .MONDAY...East winds 5 to 10 knots, becoming northeast in the afternoon. Seas 2 to 3 feet. Wave Detail: South 1 foot at 5 seconds. Numerous showers in the afternoon. .MONDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: South 1 foot at 4 seconds and northeast 1 foot at 7 seconds. Scattered showers in the evening. .TUESDAY...East winds 5 to 10 knots, diminishing to around 5 knots in the afternoon. Seas around 2 feet. Wave Detail: South 1 foot at 5 seconds. Numerous showers in the afternoon. .TUESDAY NIGHT...East winds around 5 knots, increasing to 5 to 10 knots after midnight. Seas around 2 feet. Wave Detail: South 1 foot at 5 seconds. Scattered showers in the evening. .WEDNESDAY...East winds around 5 knots, becoming northeast 10 to 15 knots with gusts up to 20 knots in the afternoon. Seas around 2 feet. Wave Detail: Northeast 1 foot at 2 seconds and south 1 foot at 5 seconds. Scattered showers in the afternoon. .WEDNESDAY NIGHT...Northeast winds 10 to 15 knots with gusts up to 25 knots. Seas 2 to 3 feet. .THURSDAY...East winds 10 to 15 knots. Seas 2 to 3 feet. Scattered showers in the afternoon. .THURSDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to 15 knots after midnight. Seas 2 to 4 feet, occasionally to 5 feet. .FRIDAY...East winds 5 to 10 knots. Seas 2 to 3 feet. Scattered showers in the afternoon. .FRIDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. $$ AMZ745-240915- Coastal Waters of Southwestern Puerto Rico out 10 NM- 407 PM AST Sun Aug 23 2026 .TONIGHT...East winds 5 to 10 knots, increasing to 10 to 15 knots with gusts up to 20 knots late this evening and overnight. Seas around 2 feet. Wave Detail: Southeast 2 feet at 5 seconds. Isolated showers this evening. .MONDAY...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. .MONDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots, diminishing to 5 to 10 knots after midnight. Seas around 2 feet. Wave Detail: Southeast 2 feet at 5 seconds. .TUESDAY...East winds 5 to 10 knots, becoming southeast 10 to 15 knots in the afternoon. Gusts up to 25 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at 5 seconds. Scattered showers in the afternoon. .TUESDAY NIGHT...East winds 5 to 10 knots with gusts up to 20 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at 5 seconds. .WEDNESDAY...East winds 5 to 10 knots, becoming southeast in the afternoon. Seas around 2 feet. Wave Detail: Southeast 2 feet at 5 seconds. Scattered showers in the afternoon. .WEDNESDAY NIGHT...Northeast winds 5 to 10 knots. Seas around 2 feet. .THURSDAY...East winds around 5 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. .FRIDAY...East winds 5 to 10 knots, becoming southeast 10 to 15 knots in the afternoon. Seas around 2 feet. Scattered showers in the afternoon. .FRIDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet. $$