Dangerous Heat in the Central and Eastern U.S.; Severe Thunderstorms in the Great Lakes

Thunderstorms with strong wind gusts and hail will be possible today from Michigan into the Lower Great Lakes region. A significant and dangerous heat wave will expand from the Central U.S. into the Eastern U.S this weekend through much of next week. Numerous daily record highs and warm lows are likely. Read More >

Hazardous Weather Conditions

Last Update: 926 AM AST Sat Jun 21 2025

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San Juan, PR Local Forecast Office

51NM N San Juan PR

Marine Zone Forecast


Rest Of Today
East winds around 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 and northeast 1 foot at 10 seconds. Isolated showers.
Tonight
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 and northeast 1 foot at 10 seconds.
Sunday
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 7 seconds and northeast 1 foot at 9 seconds. Scattered showers in the morning.
Sunday Night
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 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 4 feet at 6 seconds and northeast 2 feet at 10 seconds.
Monday 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 6 seconds and northeast 2 feet at 11 seconds.
Tuesday
East winds 15 to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet.
Tuesday Night
East winds 15 to 20 knots. Seas around 5 feet, occasionally to 6 feet.
Wednesday
East winds 15 to 20 knots. Seas around 5 feet, occasionally to 6 feet.
Wednesday Night
East winds 15 to 20 knots. Seas 5 to 6 feet, occasionally to 8 feet.



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926 AM AST Sat Jun 21 2025
 
 

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