National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

San Juan, Luis Munoz Marin International Airport (TJSJ)

Lat: 18.45°NLon: 66°WElev: 10ft.

Partly Cloudy

90°F

32°C

Humidity 67%
Wind Speed E 18 mph
Barometer 29.93 in
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index104°F (40°C)
Last update 4 Sep 3:56 pm AST
Extended Forecast for

San Juan PR

Heat Advisory until September 4, 05:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory until September 4, 05:00pm

    NOW until 5:00pm Fri

    Heat Advisory

  • This Afternoon

    High: 91 °F

    Scattered
    Showers

  • Tonight

    Tonight: Scattered showers, mainly between 9pm and 3am. Partly cloudy, with a low around 80. East southeast wind 6 to 8 mph. Chance of precipitation is 30%.

    Low: 80 °F

    Scattered
    Showers

  • Saturday

    Saturday: Scattered showers, mainly after noon. Mostly sunny, with a high near 92. Heat index values as high as 109. East wind 7 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.

    High: 92 °F

    Scattered
    Showers

  • Saturday Night

    Saturday Night: Isolated showers. Partly cloudy, with a low around 80. East southeast wind 6 to 8 mph. Chance of precipitation is 20%.

    Low: 80 °F

    Isolated
    Showers

  • Sunday

    Sunday: Isolated showers, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 92. East wind 7 to 16 mph. Chance of precipitation is 70%.

    High: 92 °F

    Isolated
    Showers then
    Showers
    Likely

  • Sunday Night

    Sunday Night: Scattered showers. Mostly cloudy, with a low around 79. Southeast wind 6 to 8 mph. Chance of precipitation is 40%.

    Low: 79 °F

    Scattered
    Showers

  • Labor Day

    Labor Day: Showers likely after noon. Mostly sunny, with a high near 90. East wind 7 to 17 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.

    High: 90 °F

    Sunny then
    Showers
    Likely

  • Monday Night

    Monday Night: Partly cloudy, with a low around 79. East southeast wind around 9 mph.

    Low: 79 °F

    Partly Cloudy

Detailed Forecast

This Afternoon
Scattered showers. Partly sunny, with a high near 91. Heat index values as high as 103. East wind around 14 mph. Chance of precipitation is 40%.
Tonight
Scattered showers, mainly between 9pm and 3am. Partly cloudy, with a low around 80. East southeast wind 6 to 8 mph. Chance of precipitation is 30%.
Saturday
Scattered showers, mainly after noon. Mostly sunny, with a high near 92. Heat index values as high as 109. East wind 7 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
Saturday Night
Isolated showers. Partly cloudy, with a low around 80. East southeast wind 6 to 8 mph. Chance of precipitation is 20%.
Sunday
Isolated showers, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 92. East wind 7 to 16 mph. Chance of precipitation is 70%.
Sunday Night
Scattered showers. Mostly cloudy, with a low around 79. Southeast wind 6 to 8 mph. Chance of precipitation is 40%.
Labor Day
Showers likely after noon. Mostly sunny, with a high near 90. East wind 7 to 17 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.
Monday Night
Partly cloudy, with a low around 79. East southeast wind around 9 mph.
Tuesday
Scattered showers. Partly sunny, with a high near 90. East wind 10 to 16 mph. Chance of precipitation is 50%.
Tuesday Night
Partly cloudy, with a low around 80.
Wednesday
Scattered showers. Mostly sunny, with a high near 92. Chance of precipitation is 40%.
Wednesday Night
Scattered showers. Partly cloudy, with a low around 79. Chance of precipitation is 30%.
Thursday
Scattered showers. Partly sunny, with a high near 90. Chance of precipitation is 50%.
Thursday Night
Scattered showers. Mostly cloudy, with a low around 78. Chance of precipitation is 40%.
Friday
Scattered showers. Partly sunny, with a high near 90.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
San Juan PR
 18.41°N 66.08°W (Elev. 16 ft)
Last Update:
4:02 pm AST Sep 4, 2026
Forecast Valid:
4pm AST Sep 4, 2026-6pm AST Sep 11, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation