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Hazardous Weather Conditions

Current conditions at

San Juan, Luis Munoz Marin International Airport (TJSJ)

Lat: 18.45°NLon: 66°WElev: 10ft.

Partly Cloudy

88°F

31°C

Humidity 59%
Wind Speed E 9 G 21 mph
Barometer 30.06 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index95°F (35°C)
Last update 6 Aug 8:56 am AST
Extended Forecast for

2 Miles WNW Guaynabo PR

Heat Advisory August 6, 10:00am until August 6, 05:00pm
Click here for hazard details and duration
Heat Advisory

  • Today

    Today: Scattered showers. Partly sunny, with a high near 91. Heat index values as high as 105. East wind 9 to 16 mph. Chance of precipitation is 40%.

    High: 91 °F

    Scattered
    Showers

  • Tonight

    Tonight: Isolated showers before midnight, then isolated showers after 3am. Partly cloudy, with a low around 79. East wind 5 to 9 mph. Chance of precipitation is 20%.

    Low: 79 °F

    Isolated
    Showers

  • Friday

    Friday: Scattered showers, mainly before 9am. Mostly sunny, with a high near 90. Heat index values as high as 103. East northeast wind 8 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.

    High: 90 °F

    Scattered
    Showers

  • Friday Night

    Friday Night: Isolated showers. Partly cloudy, with a low around 79. East wind 6 to 10 mph. Chance of precipitation is 10%.

    Low: 79 °F

    Isolated
    Showers

  • Saturday

    Saturday: Isolated showers before noon. Sunny, with a high near 90. East wind 10 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.

    High: 90 °F

    Isolated
    Showers then
    Sunny

  • Saturday Night

    Saturday Night: Isolated showers. Partly cloudy, with a low around 81. East wind 7 to 10 mph. Chance of precipitation is 10%.

    Low: 81 °F

    Isolated
    Showers

  • Sunday

    Sunday: Scattered showers, mainly after noon. Mostly sunny, with a high near 89. East wind 11 to 17 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.

    High: 89 °F

    Mostly Sunny
    then
    Scattered
    Showers

  • Sunday Night

    Sunday Night: Scattered showers. Mostly cloudy, with a low around 79. East wind 8 to 10 mph. Chance of precipitation is 50%.

    Low: 79 °F

    Scattered
    Showers

  • Monday

    Monday: Scattered showers. Partly sunny, with a high near 89. East wind 10 to 17 mph. Chance of precipitation is 40%.

    High: 89 °F

    Scattered
    Showers

Detailed Forecast

Today
Scattered showers. Partly sunny, with a high near 91. Heat index values as high as 105. East wind 9 to 16 mph. Chance of precipitation is 40%.
Tonight
Isolated showers before midnight, then isolated showers after 3am. Partly cloudy, with a low around 79. East wind 5 to 9 mph. Chance of precipitation is 20%.
Friday
Scattered showers, mainly before 9am. Mostly sunny, with a high near 90. Heat index values as high as 103. East northeast wind 8 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
Friday Night
Isolated showers. Partly cloudy, with a low around 79. East wind 6 to 10 mph. Chance of precipitation is 10%.
Saturday
Isolated showers before noon. Sunny, with a high near 90. East wind 10 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
Saturday Night
Isolated showers. Partly cloudy, with a low around 81. East wind 7 to 10 mph. Chance of precipitation is 10%.
Sunday
Scattered showers, mainly after noon. Mostly sunny, with a high near 89. East wind 11 to 17 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.
Sunday Night
Scattered showers. Mostly cloudy, with a low around 79. East wind 8 to 10 mph. Chance of precipitation is 50%.
Monday
Scattered showers. Partly sunny, with a high near 89. East wind 10 to 17 mph. Chance of precipitation is 40%.
Monday Night
Mostly clear, with a low around 80.
Tuesday
Scattered showers. Partly sunny, with a high near 90. Chance of precipitation is 50%.
Tuesday Night
Scattered showers. Partly cloudy, with a low around 80. Chance of precipitation is 30%.
Wednesday
Scattered showers. Partly sunny, with a high near 92. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WNW Guaynabo PR
 18.39°N 66.15°W (Elev. 43 ft)
Last Update:
4:47 am AST Aug 6, 2026
Forecast Valid:
9am AST Aug 6, 2026-6pm AST Aug 12, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation