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

84°F

29°C

Humidity 66%
Wind Speed Vrbl 5 mph
Barometer 30.00 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index89°F (32°C)
Last update 21 Sep 8:56 am AST
Extended Forecast for

Emajagua PR

Heat Advisory September 21, 10:00am until September 21, 03:00pm
Click here for hazard details and duration
Heat Advisory

  • Today

    Today: Scattered showers, mainly before noon. Mostly sunny, with a high near 88. Southeast wind around 10 mph. Chance of precipitation is 30%.

    High: 88 °F

    Scattered
    Showers

  • Tonight

    Tonight: Scattered showers and thunderstorms, then showers likely after midnight. Mostly cloudy, with a low around 78. East wind 6 to 8 mph. Chance of precipitation is 60%.

    Low: 78 °F

    Showers
    Likely

  • Tuesday

    Tuesday: Scattered showers. Mostly sunny, with a high near 88. East southeast wind around 9 mph. Chance of precipitation is 50%. New precipitation amounts between a quarter and half of an inch possible.

    High: 88 °F

    Scattered
    Showers

  • Tuesday Night

    Tuesday Night: Scattered showers. Partly cloudy, with a low around 79. East wind around 9 mph. Chance of precipitation is 50%.

    Low: 79 °F

    Scattered
    Showers

  • Wednesday

    Wednesday: Scattered showers, mainly before noon. Mostly sunny, with a high near 88. East southeast wind around 11 mph. Chance of precipitation is 40%.

    High: 88 °F

    Scattered
    Showers

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 79. East wind 7 to 9 mph.

    Low: 79 °F

    Mostly Clear

  • Thursday

    Thursday: Scattered showers, mainly before noon. Mostly sunny, with a high near 88. East southeast wind around 10 mph. Chance of precipitation is 40%.

    High: 88 °F

    Scattered
    Showers then
    Mostly Sunny

  • Thursday Night

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

    Low: 79 °F

    Scattered
    Showers

  • Friday

    Friday: Scattered showers. Partly sunny, with a high near 89. East southeast wind around 9 mph. Chance of precipitation is 50%.

    High: 89 °F

    Scattered
    Showers

Detailed Forecast

Today
Scattered showers, mainly before noon. Mostly sunny, with a high near 88. Southeast wind around 10 mph. Chance of precipitation is 30%.
Tonight
Scattered showers and thunderstorms, then showers likely after midnight. Mostly cloudy, with a low around 78. East wind 6 to 8 mph. Chance of precipitation is 60%.
Tuesday
Scattered showers. Mostly sunny, with a high near 88. East southeast wind around 9 mph. Chance of precipitation is 50%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday Night
Scattered showers. Partly cloudy, with a low around 79. East wind around 9 mph. Chance of precipitation is 50%.
Wednesday
Scattered showers, mainly before noon. Mostly sunny, with a high near 88. East southeast wind around 11 mph. Chance of precipitation is 40%.
Wednesday Night
Mostly clear, with a low around 79. East wind 7 to 9 mph.
Thursday
Scattered showers, mainly before noon. Mostly sunny, with a high near 88. East southeast wind around 10 mph. Chance of precipitation is 40%.
Thursday Night
Scattered showers. Mostly cloudy, with a low around 79. East wind around 8 mph. Chance of precipitation is 50%.
Friday
Scattered showers. Partly sunny, with a high near 89. East southeast wind around 9 mph. Chance of precipitation is 50%.
Friday Night
Scattered showers. Partly cloudy, with a low around 80. Chance of precipitation is 30%.
Saturday
Mostly sunny, with a high near 89.
Saturday Night
Clear, with a low around 79.
Sunday
Scattered showers. Partly sunny, with a high near 89. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Emajagua PR
 18°N 65.87°W (Elev. 0 ft)
Last Update:
3:32 am AST Sep 21, 2026
Forecast Valid:
9am AST Sep 21, 2026-6pm AST Sep 27, 2026
 
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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