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Last Update: 403 AM AST Wed May 20 2026

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San Juan, PR Local Forecast Office

51NM N San Juan PR

Marine Zone Forecast

...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.



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403 AM AST Wed May 20 2026
 
 

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