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National Weather Service Forecast for: San Juan, Puerto Rico  

Updated: 4:37 am AST Sep 4, 2025 

Heat Advisory
Hazardous Weather Outlook
 

Today

Today: Scattered showers, mainly between 9am and 3pm. Mostly sunny, with a high near 89. East wind 6 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
High: 89 °F		Tonight

Tonight: Showers likely, mainly after 3am. Mostly cloudy, with a low around 78. East southeast wind 5 to 9 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Low: 78 °F		Friday

Friday: Showers likely and possibly a thunderstorm before 9am, then scattered showers between 9am and noon, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 89. Heat index values as high as 103. East wind 8 to 16 mph. Chance of precipitation is 60%. New rainfall amounts between 1 and 2 inches possible.
High: 89 °F		Friday
Night
Friday Night: Scattered showers, mainly after midnight. Partly cloudy, with a low around 79. East wind around 9 mph. Chance of precipitation is 30%.
Low: 79 °F		Saturday

Saturday: Scattered showers, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 90. East wind 9 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
High: 90 °F		Saturday
Night
Saturday Night: Scattered showers, mainly after midnight. Partly cloudy, with a low around 77. East wind 7 to 9 mph. Chance of precipitation is 30%.
Low: 77 °F		Sunday

Sunday: Showers likely, mainly after noon. Partly sunny, with a high near 87. East wind 7 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
High: 87 °F		Sunday
Night
Sunday Night: Scattered showers. Partly cloudy, with a low around 78. East southeast wind 6 to 9 mph. Chance of precipitation is 30%.
Low: 78 °F
Isolated
Showers then
Scattered
Showers
Isolated
Showers then
Showers
Likely
Showers
Likely

Scattered
Showers

Showers
Likely

Scattered
Showers

Mostly Sunny
then Showers
Likely
Scattered
Showers

National Weather Service Forecast Details

 

 

 

MARIA

 

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