FZCA52 TJSJ 200803 CWFSJU Coastal Waters Forecast National Weather Service San Juan PR 403 AM AST Wed May 20 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. AMZ700-202115- 403 AM AST Wed May 20 2026 .Synopsis for Puerto Rico and the U.S. Virgin Islands Waters... Marine conditions will remain somewhat hazardous through the next several days as strong high pressure over the Atlantic continues to support moderate to fresh easterly winds across the regional waters. Winds will occasionally reach locally strong levels, resulting in choppy to rough seas at times. Small Craft Advisories remain in effect through at least Thursday afternoon for the offshore Atlantic waters. In addition, isolated afternoon and early evening thunderstorms may develop each day across the western coastal waters of Puerto Rico, producing locally higher winds and seas near storms. $$ AMZ711-202115- Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N- 403 AM AST Wed May 20 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY AFTERNOON... .TODAY...East winds 15 to 20 knots with gusts up to 30 knots. Seas 6 to 7 feet, occasionally to 9 feet. Wave Detail: East 6 feet at 8 seconds. Scattered showers early this morning, then isolated showers late this morning and afternoon. .TONIGHT...East winds 15 to 20 knots with gusts up to 30 knots. Seas 6 to 7 feet, occasionally to 9 feet. Wave Detail: East 6 feet at 8 seconds. .THURSDAY...East winds 15 to 20 knots with gusts up to 30 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: East 6 feet at 8 seconds. .THURSDAY NIGHT...East winds 15 to 20 knots with gusts up to 30 knots. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at 8 seconds. Scattered showers in the evening. .FRIDAY...East winds around 15 knots with gusts up to 25 knots. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: East 5 feet at 8 seconds. .FRIDAY NIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas around 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 8 seconds and southeast 1 foot at 5 seconds. .SATURDAY...East winds 15 to 20 knots. Seas around 5 feet, occasionally to 6 feet. Scattered showers in the morning. .SATURDAY NIGHT...East winds 15 to 20 knots. Seas 5 to 6 feet, occasionally to 8 feet. Scattered showers. .SUNDAY...East winds 15 to 20 knots. Seas around 5 feet, occasionally to 6 feet. Scattered showers in the afternoon. .SUNDAY NIGHT...East winds 15 to 20 knots. Seas 5 to 6 feet, occasionally to 8 feet. $$ AMZ712-202115- Coastal Waters of Northern Puerto Rico out 10 NM- 403 AM AST Wed May 20 2026 ...SMALL CRAFT SHOULD EXERCISE CAUTION... .TODAY...East winds 10 to 15 knots, increasing to 15 to 20 knots late this morning and afternoon. Gusts up to 30 knots. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: Northeast 6 feet at 8 seconds. Isolated showers this morning. Scattered showers early this afternoon, then isolated showers late. .TONIGHT...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: Northeast 6 feet at 8 seconds. Scattered showers after midnight. .THURSDAY...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 5 to 6 feet, occasionally to 8 feet. Wave Detail: Northeast 5 feet at 8 seconds. Scattered showers in the afternoon. .THURSDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to 15 knots after midnight. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: Northeast 5 feet at 8 seconds. Scattered showers in the evening. .FRIDAY...East winds 10 to 15 knots, increasing to 15 to 20 knots in the afternoon. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast 5 feet at 8 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: Northeast 5 feet at 8 seconds. .SATURDAY...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 afternoon. .SATURDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to 15 knots after midnight. Seas 4 to 5 feet, occasionally to 6 feet. Scattered showers. .SUNDAY...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. .SUNDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to 15 knots after midnight. Seas 4 to 5 feet, occasionally to 6 feet. Scattered showers. $$ AMZ716-202115- Coastal Waters from Cabo San Juan to the waters between Anegada Island and Virgin Gorda and North 10 NM- 403 AM AST Wed May 20 2026 ...SMALL CRAFT SHOULD EXERCISE CAUTION... .TODAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: East 4 feet at 8 seconds and north 1 foot at 7 seconds. Scattered showers early this morning, then isolated showers late this morning and afternoon. .TONIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast 4 feet at 8 seconds. Scattered showers in the evening. .THURSDAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: East 4 feet at 7 seconds. Scattered showers. .THURSDAY NIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: East 4 feet at 7 seconds. Scattered showers. .FRIDAY...East winds around 15 knots with gusts up to 25 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: East 4 feet at 7 seconds. Scattered showers in the morning. .FRIDAY NIGHT...East winds around 15 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 7 seconds and southeast 2 feet at 4 seconds. .SATURDAY...East winds 15 to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers in the afternoon. .SATURDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet. Scattered showers. .SUNDAY...East winds 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet. Scattered showers. .SUNDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers. $$ AMZ723-202115- Anegada Passage east of Virgin Gorda and Saint Croix south to 17N- 403 AM AST Wed May 20 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 6 feet at 7 seconds. Isolated showers. .TONIGHT...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 7 seconds. Scattered showers in the evening. .THURSDAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: East 4 feet at 7 seconds. .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 7 seconds. Scattered showers after midnight. .FRIDAY...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 7 seconds. .FRIDAY 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. .SATURDAY...East winds 15 to 20 knots. Seas around 5 feet, occasionally to 6 feet. Scattered showers in the afternoon. .SATURDAY NIGHT...East winds 15 to 20 knots. Seas around 5 feet, occasionally to 6 feet. Scattered showers. .SUNDAY...East winds 15 to 20 knots. Seas around 5 feet, occasionally to 6 feet. Scattered showers. .SUNDAY NIGHT...East winds 15 to 20 knots. Seas around 5 feet, occasionally to 6 feet. Scattered showers. $$ AMZ726-202115- Coastal waters east of Puerto Rico, around Vieques, and around and just north of Culebra and Saint John- 403 AM AST Wed May 20 2026 ...SMALL CRAFT SHOULD EXERCISE CAUTION... .TODAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: Southeast 3 feet at 6 seconds. Scattered showers early this morning, then isolated showers late this morning and afternoon. .TONIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: East 5 feet at 7 seconds. .THURSDAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 4 feet at 7 seconds. Scattered showers in the afternoon. .THURSDAY NIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 4 feet at 7 seconds. Scattered showers. .FRIDAY...East winds around 15 knots with gusts up to 25 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: Southeast 3 feet at 6 seconds. Scattered showers in the morning. .FRIDAY NIGHT...East winds around 15 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 7 seconds. Scattered showers in the evening. .SATURDAY...East winds 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet. Scattered showers in the afternoon. .SATURDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. Scattered showers. .SUNDAY...East winds 15 to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. Scattered showers. .SUNDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. Scattered showers. $$ AMZ733-202115- Caribbean waters of Puerto Rico from 10 NM to 17N, including the coastal waters of Saint Croix- 403 AM AST Wed May 20 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: Southeast 5 feet at 7 seconds and northeast 4 feet at 8 seconds. Scattered showers until late afternoon, then isolated showers late. .TONIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: Southeast 4 feet at 7 seconds and east 4 feet at 8 seconds. .THURSDAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: Southeast 4 feet at 7 seconds and east 4 feet at 8 seconds. Scattered showers 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: Southeast 4 feet at 7 seconds and east 4 feet at 8 seconds. .FRIDAY...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 7 seconds. Scattered showers in the morning. .FRIDAY NIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: Southeast 4 feet at 7 seconds and east 3 feet at 8 seconds. Scattered showers. .SATURDAY...East winds 15 to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. Scattered showers in the morning. .SATURDAY NIGHT...East winds 15 to 20 knots. Seas around 5 feet, occasionally to 6 feet. Scattered showers. .SUNDAY...East winds 15 to 20 knots. Seas around 5 feet, occasionally to 6 feet. Scattered showers in the afternoon. .SUNDAY NIGHT...East winds 15 to 20 knots. Seas around 5 feet, occasionally to 6 feet. Scattered showers. $$ AMZ735-202115- Coastal Waters of Southern Puerto Rico out 10 NM- 403 AM AST Wed May 20 2026 ...SMALL CRAFT SHOULD EXERCISE CAUTION... .TODAY...East winds 10 to 15 knots, increasing to 15 to 20 knots late this morning and afternoon. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: Southeast 5 feet at 7 seconds. Numerous showers early this morning, then scattered showers late this morning and early afternoon. Isolated showers late. .TONIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: Southeast 5 feet at 7 seconds. Scattered showers in the evening. .THURSDAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: Southeast 4 feet at 7 seconds. Scattered showers in the morning. .THURSDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: Southeast 4 feet at 7 seconds. .FRIDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: Southeast 4 feet at 7 seconds. Scattered showers in the morning. .FRIDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 4 feet at 7 seconds. .SATURDAY...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. .SATURDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to 15 knots after midnight. Seas 3 to 4 feet, occasionally to 5 feet. .SUNDAY...East winds 10 to 15 knots, increasing to 15 to 20 knots in the afternoon. Seas 3 to 5 feet, occasionally to 6 feet. Scattered showers in the afternoon. .SUNDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to 15 knots after midnight. Seas 3 to 5 feet, occasionally to 6 feet. Scattered showers. $$ AMZ741-202115- Mona Passage Southward to 17N- 403 AM AST Wed May 20 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: Southeast 5 feet at 7 seconds. Scattered showers. .TONIGHT...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 7 seconds. .THURSDAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: East 5 feet at 7 seconds. Scattered showers in the afternoon. .THURSDAY NIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: Southeast 5 feet at 7 seconds and north 1 foot at 7 seconds. .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 7 seconds. Scattered showers in the afternoon. .FRIDAY NIGHT...East winds 10 to 15 knots, increasing to 15 to 20 knots after midnight. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 4 feet at 7 seconds. Scattered showers in the evening. .SATURDAY...East winds 15 to 20 knots, diminishing to 10 to 15 knots in the afternoon. Seas 4 to 5 feet, occasionally to 6 feet. Scattered showers in the afternoon. .SATURDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. Scattered showers. .SUNDAY...East winds 15 to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. .SUNDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Scattered showers. $$ AMZ742-202115- Coastal Waters of Northwestern Puerto Rico out 10 NM- 403 AM AST Wed May 20 2026 .TODAY...East winds 5 to 10 knots, increasing to 10 to 15 knots with gusts up to 25 knots this afternoon. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: North 1 foot at 7 seconds and south 1 foot at 7 seconds. Isolated showers this morning, then numerous showers with isolated thunderstorms this afternoon. .TONIGHT...East winds 10 to 15 knots, diminishing to 5 to 10 knots after midnight. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: South 1 foot at 6 seconds. Scattered showers in the evening. .THURSDAY...Northeast winds 5 to 10 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: South 1 foot at 7 seconds. Numerous showers in the afternoon. .THURSDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: South 1 foot at 7 seconds. Scattered showers in the evening. .FRIDAY...East winds 5 to 10 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: South 1 foot at 7 seconds. Numerous showers in the afternoon. .FRIDAY NIGHT...East winds 5 to 10 knots with gusts up to 20 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast 2 feet at 6 seconds and south 1 foot at 7 seconds. Scattered showers in the evening. .SATURDAY...East winds 5 to 10 knots. Seas 2 to 3 feet. Numerous showers in the afternoon. .SATURDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Scattered showers. .SUNDAY...East winds 5 to 10 knots, increasing to 10 to 15 knots in the afternoon. Seas 2 to 4 feet, occasionally to 5 feet. Numerous showers in the afternoon. .SUNDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Scattered showers. Winds and seas higher in and near thunderstorms. $$ AMZ745-202115- Coastal Waters of Southwestern Puerto Rico out 10 NM- 403 AM AST Wed May 20 2026 .TODAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 3 feet at 6 seconds and northeast 1 foot at 2 seconds. Isolated showers early this morning, then scattered showers late this morning and early afternoon. 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 6 seconds. .THURSDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 7 seconds and northeast 1 foot at 2 seconds. .THURSDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 6 seconds. .FRIDAY...East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: South 2 feet at 7 seconds. Scattered showers in the afternoon. .FRIDAY 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: South 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. Seas 2 to 3 feet. .SUNDAY...East winds 5 to 10 knots, increasing to 10 to 15 knots in the afternoon. Seas 2 to 3 feet. Scattered showers in the afternoon. .SUNDAY NIGHT...East winds 10 to 15 knots, diminishing to 5 to 10 knots after midnight. Seas 2 to 3 feet. Scattered showers. $$