Coastal Waters Forecast
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
165 FZCA52 TJSJ 142018 CWFSJU Coastal Waters Forecast National Weather Service San Juan PR 418 PM AST Fri Aug 14 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. AMZ700-150930- 418 PM AST Fri Aug 14 2026 .Synopsis for Puerto Rico and the U.S. Virgin Islands Waters... A tight pressure gradient will maintain fresh to locally strong easterly winds and choppy to rough seas around 5 to 7 feet, with occasional seas of 8 to 9 feet across the offshore waters and local passages. Small Craft Advisories remain in effect through at least Sunday. Showers and thunderstorms will increase by Saturday afternoon into Sunday as the tropical wave AL92 moves south of the region, affecting Caribbean waters and local passages. $$ AMZ711-150930- Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N- 418 PM AST Fri Aug 14 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY AFTERNOON... .TONIGHT...East winds 15 to 20 knots with gusts up to 30 knots. Seas 6 to 7 feet, occasionally to 9 feet. Wave Detail: East 7 feet at 7 seconds and northeast 1 foot at 12 seconds. Isolated showers after midnight. .SATURDAY...East winds around 20 knots with gusts up to 30 knots. Seas around 7 feet, occasionally to 9 feet. Wave Detail: East 7 feet at 7 seconds and northeast 1 foot at 12 seconds. .SATURDAY NIGHT...East winds around 20 knots with gusts up to 30 knots. Seas around 7 feet, occasionally to 9 feet. Wave Detail: East 7 feet at 8 seconds and northeast 1 foot at 11 seconds. Scattered showers after midnight. .SUNDAY...East winds 15 to 20 knots with gusts up to 30 knots. Seas 6 to 7 feet, occasionally to 9 feet. Wave Detail: East 7 feet at 8 seconds and northeast 3 feet at 11 seconds. .SUNDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to 15 knots after midnight. Gusts up to 30 knots. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at 8 seconds and northeast 1 foot at 10 seconds. .MONDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 8 seconds and northeast 1 foot at 10 seconds. .MONDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas 4 to 5 feet, occasionally to 6 feet. Scattered showers. .TUESDAY...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. .TUESDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. .WEDNESDAY...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. .WEDNESDAY NIGHT...East winds around 15 knots. Seas 3 to 5 feet, occasionally to 6 feet. $$ AMZ712-150930- Coastal Waters of Northern Puerto Rico out 10 NM- 418 PM AST Fri Aug 14 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY AFTERNOON... .TONIGHT...East winds 15 to 20 knots with gusts up to 30 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: East 6 feet at 7 seconds and northeast 1 foot at 12 seconds. Isolated showers late this evening and overnight. .SATURDAY...East winds 15 to 20 knots, increasing to 20 to 25 knots in the afternoon. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: Northeast 6 feet at 7 seconds and northeast 1 foot at 12 seconds. .SATURDAY NIGHT...East winds 15 to 20 knots with gusts up to 30 knots. Seas 6 to 7 feet, occasionally to 9 feet. Wave Detail: Northeast 6 feet at 7 seconds and northeast 1 foot at 12 seconds. Scattered showers. .SUNDAY...East winds 15 to 20 knots, increasing to 20 to 25 knots in the afternoon. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at 8 seconds and northeast 1 foot at 11 seconds. Scattered showers. .SUNDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to 15 knots after midnight. Gusts up to 30 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at 8 seconds and northeast 1 foot at 11 seconds. Scattered showers in the evening. .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 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 4 feet at 8 seconds and northeast 1 foot at 10 seconds. Scattered showers. .MONDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas 3 to 5 feet, occasionally to 6 feet. .TUESDAY...East winds 5 to 10 knots, increasing to 15 to 20 knots in the afternoon. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers in the afternoon. .TUESDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. .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 afternoon. .WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. $$ AMZ716-150930- Coastal Waters from Cabo San Juan to the waters between Anegada Island and Virgin Gorda and North 10 NM- 418 PM AST Fri Aug 14 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY AFTERNOON... .TONIGHT...East winds 20 to 25 knots with gusts up to 30 knots. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at 6 seconds and northeast 1 foot at 12 seconds. Isolated showers late this evening and overnight. .SATURDAY...East winds 20 to 25 knots with gusts up to 30 knots. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at 6 seconds and northeast 1 foot at 12 seconds. .SATURDAY NIGHT...East winds around 20 knots with gusts up to 30 knots. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at 7 seconds and northeast 1 foot at 12 seconds. Scattered showers. .SUNDAY...East winds 15 to 20 knots with gusts up to 30 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at 6 seconds and northeast 1 foot at 11 seconds. Scattered showers. .SUNDAY NIGHT...East winds around 15 knots with gusts up to 25 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 7 seconds and northeast 1 foot at 11 seconds. .MONDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 6 seconds and northeast 1 foot at 10 seconds. Scattered showers in the morning. .MONDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Scattered showers. .TUESDAY...East winds 10 to 15 knots. Seas 2 to 3 feet. .TUESDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet. .WEDNESDAY...East winds 10 to 15 knots. Seas 2 to 3 feet. .WEDNESDAY NIGHT...East winds around 15 knots. Seas 2 to 3 feet. $$ AMZ723-150930- Anegada Passage east of Virgin Gorda and Saint Croix south to 17N- 418 PM AST Fri Aug 14 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY AFTERNOON... .TONIGHT...East winds 20 to 25 knots with gusts up to 35 knots. Seas 6 to 7 feet, occasionally to 9 feet. Wave Detail: East 7 feet at 7 seconds and north 1 foot at 12 seconds. Isolated showers this evening. Scattered showers after midnight, then isolated showers late. .SATURDAY...East winds 20 to 25 knots with gusts up to 30 knots. Seas 7 to 8 feet, occasionally to 10 feet. Wave Detail: East 8 feet at 7 seconds and north 1 foot at 12 seconds. Scattered showers in the afternoon. .SATURDAY NIGHT...East winds 20 to 25 knots with gusts up to 30 knots. Seas 7 to 8 feet, occasionally to 10 feet. Wave Detail: East 8 feet at 8 seconds and north 1 foot at 11 seconds. Scattered showers. .SUNDAY...East winds 20 to 25 knots, diminishing to 15 to 20 knots in the afternoon. Seas 6 to 7 feet, occasionally to 9 feet. Wave Detail: East 7 feet at 7 seconds and northeast 1 foot at 11 seconds. Scattered showers in the morning. .SUNDAY 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 and northeast 1 foot at 11 seconds. Scattered showers after midnight. .MONDAY...East winds 10 to 15 knots with gusts up to 25 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. 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. .TUESDAY...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. .TUESDAY NIGHT...East winds 10 to 15 knots. Seas around 3 feet. Scattered showers. .WEDNESDAY...East winds 10 to 15 knots. Seas around 3 feet. Scattered showers. .WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. $$ AMZ726-150930- Coastal waters east of Puerto Rico, around Vieques, and around and just north of Culebra and Saint John- 418 PM AST Fri Aug 14 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY AFTERNOON... .TONIGHT...East winds 20 to 25 knots with gusts up to 30 knots. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at 6 seconds. Isolated showers. .SATURDAY...East winds 20 to 25 knots with gusts up to 30 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: East 6 feet at 7 seconds. Scattered showers in the afternoon. .SATURDAY NIGHT...East winds 20 to 25 knots with gusts up to 30 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: East 7 feet at 7 seconds. Scattered showers. .SUNDAY...East winds 15 to 20 knots with gusts up to 30 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: East 7 feet at 8 seconds. Scattered showers. .SUNDAY NIGHT...East winds around 15 knots with gusts up to 25 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 8 seconds. .MONDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 7 seconds. Scattered showers in the morning. .MONDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers. .TUESDAY...East winds 10 to 15 knots. Seas 2 to 3 feet. .TUESDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet. .WEDNESDAY...East winds 10 to 15 knots. Seas 2 to 3 feet. Scattered showers in the afternoon. .WEDNESDAY NIGHT...East winds around 15 knots. Seas around 3 feet. $$ AMZ733-150930- Caribbean waters of Puerto Rico from 10 NM to 17N, including the coastal waters of Saint Croix- 418 PM AST Fri Aug 14 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY AFTERNOON... .TONIGHT...East winds 20 to 25 knots with gusts up to 30 knots. Seas 6 to 7 feet, occasionally to 9 feet. Wave Detail: East 7 feet at 7 seconds. Scattered showers early this evening, then isolated showers late this evening and overnight. .SATURDAY...East winds 20 to 25 knots with gusts up to 35 knots. Seas 6 to 8 feet, occasionally to 10 feet. Wave Detail: East 8 feet at 7 seconds. Scattered showers in the afternoon. .SATURDAY NIGHT...East winds 20 to 25 knots with gusts up to 35 knots. Seas 7 to 9 feet, occasionally to 11 feet. Wave Detail: East 8 feet at 8 seconds. Scattered showers. .SUNDAY...East winds 20 to 25 knots, diminishing to 15 to 20 knots in the afternoon. Seas 6 to 9 feet, occasionally to 11 feet. Wave Detail: East 8 feet at 8 seconds. Scattered showers. .SUNDAY NIGHT...East winds 15 to 20 knots with gusts up to 30 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: East 7 feet at 8 seconds. Scattered showers. .MONDAY...East winds 15 to 20 knots, diminishing to 10 to 15 knots in the afternoon. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at 7 seconds. Scattered showers in the morning. .MONDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas 4 to 5 feet, occasionally to 6 feet. .TUESDAY...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. .TUESDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. .WEDNESDAY...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers. .WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. $$ AMZ735-150930- Coastal Waters of Southern Puerto Rico out 10 NM- 418 PM AST Fri Aug 14 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY AFTERNOON... .TONIGHT...East winds 15 to 20 knots with gusts up to 30 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: East 6 feet at 7 seconds. Isolated showers late this evening and overnight. .SATURDAY...East winds 15 to 20 knots, increasing to 20 to 25 knots in the afternoon. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at 7 seconds. .SATURDAY NIGHT...East winds 15 to 20 knots with gusts up to 30 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: East 6 feet at 7 seconds. Scattered showers. .SUNDAY...East winds 15 to 20 knots with gusts up to 30 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: East 7 feet at 8 seconds. Scattered showers in the afternoon. .SUNDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to 15 knots after midnight. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: East 7 feet at 8 seconds. Scattered showers in the evening. .MONDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 8 seconds. Scattered showers in the morning. .MONDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. .TUESDAY...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. .TUESDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. .WEDNESDAY...East winds 10 to 15 knots. Seas 2 to 3 feet. .WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet. $$ AMZ741-150930- Mona Passage Southward to 17N- 418 PM AST Fri Aug 14 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY AFTERNOON... .TONIGHT...East winds 20 to 25 knots, diminishing to 15 to 20 knots late. Seas 6 to 8 feet, occasionally to 10 feet. Wave Detail: East 7 feet at 7 seconds. Isolated showers until early morning. .SATURDAY...East winds 15 to 20 knots, increasing to 20 to 25 knots in the afternoon. Gusts up to 35 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: East 7 feet at 7 seconds. .SATURDAY NIGHT...East winds 20 to 25 knots with gusts up to 35 knots. Seas 6 to 9 feet, occasionally to 11 feet. Wave Detail: Northeast 8 feet at 8 seconds and northeast 1 foot at 11 seconds. .SUNDAY...East winds 20 to 25 knots, diminishing to 15 to 20 knots in the afternoon. Seas 6 to 9 feet, occasionally to 11 feet. Wave Detail: East 8 feet at 8 seconds and northeast 1 foot at 11 seconds. Scattered showers. .SUNDAY NIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas 6 to 8 feet, occasionally to 10 feet. Wave Detail: East 7 feet at 9 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 4 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at 8 seconds and northeast 1 foot at 10 seconds. Scattered showers. .MONDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas 4 to 5 feet, occasionally to 6 feet. .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. Scattered showers in the afternoon. .TUESDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. .WEDNESDAY...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. .WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers. $$ AMZ742-150930- Coastal Waters of Northwestern Puerto Rico out 10 NM- 418 PM AST Fri Aug 14 2026 ...SMALL CRAFT SHOULD EXERCISE CAUTION... .TONIGHT...Northeast winds 15 to 20 knots with gusts up to 30 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: Northeast 5 feet at 6 seconds. .SATURDAY...Northeast winds 15 to 20 knots, increasing to 20 to 25 knots in the afternoon. Gusts up to 35 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast 5 feet at 6 seconds and northeast 1 foot at 12 seconds. .SATURDAY NIGHT...Northeast winds 20 to 25 knots with gusts up to 35 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast 5 feet at 6 seconds and northeast 1 foot at 12 seconds. .SUNDAY...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 and northeast 1 foot at 11 seconds. Numerous showers in the afternoon. .SUNDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to 15 knots after midnight. 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 11 seconds. Scattered showers in the evening. .MONDAY...East winds 5 to 10 knots, becoming northeast 10 to 15 knots with gusts up to 20 knots in the afternoon. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast 3 feet at 6 seconds and northeast 1 foot at 10 seconds. Numerous showers in the afternoon. .MONDAY NIGHT...Northeast winds 10 to 15 knots, becoming east 5 to 10 knots after midnight. Seas 2 to 4 feet, occasionally to 5 feet. .TUESDAY...East winds around 5 knots, becoming northeast in the afternoon. Seas 2 to 3 feet. Numerous showers in the afternoon. .TUESDAY NIGHT...Northeast winds 10 to 15 knots, becoming east 5 to 10 knots after midnight. Seas 2 to 3 feet. .WEDNESDAY...East winds 5 to 10 knots, becoming northeast 10 to 15 knots in the afternoon. Seas 2 to 3 feet. Numerous showers in the afternoon. .WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet. $$ AMZ745-150930- Coastal Waters of Southwestern Puerto Rico out 10 NM- 418 PM AST Fri Aug 14 2026 .TONIGHT...Northeast winds 10 to 15 knots, diminishing to 5 to 10 knots late. Gusts up to 25 knots. Seas 3 to 5 feet, occasionally to 6 feet, subsiding to 2 to 3 feet after midnight. Wave Detail: Northeast 3 feet at 4 seconds, becoming east 3 feet at 5 seconds. .SATURDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 5 seconds. .SATURDAY 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 3 feet at 5 seconds. .SUNDAY...East winds 10 to 15 knots, becoming southeast 15 to 20 knots in the afternoon. Gusts up to 30 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 3 feet at 5 seconds. .SUNDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 3 feet at 8 seconds. .MONDAY...East winds 5 to 10 knots, becoming southeast 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 and north 1 foot at 5 seconds. Scattered showers in the afternoon. .MONDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. .TUESDAY...East winds 5 to 10 knots. Seas around 2 feet. Scattered showers in the afternoon. .TUESDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet. .WEDNESDAY...East winds 5 to 10 knots, becoming southeast in the afternoon. Seas around 2 feet. Scattered showers in the afternoon. .WEDNESDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet. $$