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.

A Few Clouds

81°F

27°C

Humidity 85%
Wind Speed SE 3 mph
Barometer 29.97 in (1014.7 mb)
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 28 Aug 4:56 am AST
Extended Forecast for

San Juan PRSimilar City Names

Heat Advisory August 28, 10:00am until August 28, 05:00pm
Click here for hazard details and duration
Heat Advisory

  • Overnight

    Overnight: Scattered showers. Mostly cloudy, with a low around 80. East southeast wind around 7 mph. Chance of precipitation is 40%.

    Low: 80 °F

    Scattered
    Showers

  • Friday

    Friday: Scattered showers, mainly after 3pm. Partly sunny, with a high near 91. Heat index values as high as 106. East wind 9 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 50%. New precipitation amounts between a quarter and half of an inch possible.

    High: 91 °F

    Scattered
    Showers

  • Friday Night

    Friday Night: Scattered showers, with thunderstorms also possible after 3am. Mostly clear, then becoming mostly cloudy toward daybreak, with a low around 81. East wind around 9 mph. Chance of precipitation is 50%.

    Low: 81 °F

    Scattered
    Showers

  • Saturday

    Saturday: Scattered showers, mainly before noon. Mostly sunny, with a high near 94. Heat index values as high as 109. East wind 11 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.

    High: 94 °F

    Scattered
    Showers

  • Saturday Night

    Saturday Night: Scattered showers after midnight. Partly cloudy, with a low around 81. East northeast wind around 10 mph. Chance of precipitation is 40%.

    Low: 81 °F

    Clear then
    Scattered
    Showers

  • Sunday

    Sunday: Scattered showers, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 92. East northeast wind 14 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.

    High: 92 °F

    Scattered
    Showers then
    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers likely, mainly after midnight. Mostly cloudy, with a low around 79. Southeast wind 5 to 13 mph. Chance of precipitation is 70%.

    Low: 79 °F

    Showers
    Likely

  • Monday

    Monday: Showers likely, mainly after noon. Partly sunny, with a high near 92. East southeast wind 6 to 10 mph. Chance of precipitation is 60%.

    High: 92 °F

    Showers
    Likely

  • Monday Night

    Monday Night: Scattered showers. Partly cloudy, with a low around 80. East southeast wind around 6 mph. Chance of precipitation is 50%.

    Low: 80 °F

    Scattered
    Showers

Detailed Forecast

Overnight
Scattered showers. Mostly cloudy, with a low around 80. East southeast wind around 7 mph. Chance of precipitation is 40%.
Friday
Scattered showers, mainly after 3pm. Partly sunny, with a high near 91. Heat index values as high as 106. East wind 9 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 50%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
Scattered showers, with thunderstorms also possible after 3am. Mostly clear, then becoming mostly cloudy toward daybreak, with a low around 81. East wind around 9 mph. Chance of precipitation is 50%.
Saturday
Scattered showers, mainly before noon. Mostly sunny, with a high near 94. Heat index values as high as 109. East wind 11 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
Saturday Night
Scattered showers after midnight. Partly cloudy, with a low around 81. East northeast wind around 10 mph. Chance of precipitation is 40%.
Sunday
Scattered showers, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 92. East northeast wind 14 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.
Sunday Night
Showers likely, mainly after midnight. Mostly cloudy, with a low around 79. Southeast wind 5 to 13 mph. Chance of precipitation is 70%.
Monday
Showers likely, mainly after noon. Partly sunny, with a high near 92. East southeast wind 6 to 10 mph. Chance of precipitation is 60%.
Monday Night
Scattered showers. Partly cloudy, with a low around 80. East southeast wind around 6 mph. Chance of precipitation is 50%.
Tuesday
Scattered showers. Mostly cloudy, with a high near 92. Chance of precipitation is 50%.
Tuesday Night
Scattered showers. Mostly cloudy, with a low around 79. Chance of precipitation is 50%.
Wednesday
Scattered showers. Partly sunny, with a high near 93. Chance of precipitation is 50%.
Wednesday Night
Partly cloudy, with a low around 79.
Thursday
Scattered showers. Mostly sunny, with a high near 93. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
San Juan PRSimilar City Names
 18.41°N 66.07°W (Elev. 56 ft)
Last Update:
4:10 am AST Aug 28, 2026
Forecast Valid:
5am AST Aug 28, 2026-6pm AST Sep 3, 2026
 
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