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.

Fair

81°F

27°C

Humidity 84%
Wind Speed Calm
Barometer 29.94 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 19 Sep 3:56 am AST
Extended Forecast for

2 Miles WNW Loiza PR

Heat Advisory September 19, 10:00am until September 19, 05:00pm
Click here for hazard details and duration
Heat Advisory

  • Overnight

    Overnight: Scattered showers. Partly cloudy, with a low around 83. East southeast wind around 8 mph. Chance of precipitation is 30%.

    Low: 83 °F

    Scattered
    Showers

  • Saturday

    Saturday: Isolated showers before 9am, then isolated showers after noon. Mostly sunny, with a high near 85. East wind 7 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 85 °F

    Isolated
    Showers

  • Saturday Night

    Saturday Night: Showers likely, mainly after 3am. Mostly cloudy, with a low around 83. East wind 6 to 9 mph. Chance of precipitation is 60%.

    Low: 83 °F

    Scattered
    Showers then
    Showers
    Likely

  • Sunday

    Sunday: Showers likely, mainly between 9am and noon. Partly sunny, with a high near 85. East wind 7 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    High: 85 °F

    Showers
    Likely then
    Scattered
    Showers

  • Sunday Night

    Sunday Night: Showers likely, mainly after midnight. Mostly cloudy, with a low around 83. Southeast wind around 8 mph. Chance of precipitation is 60%.

    Low: 83 °F

    Showers
    Likely

  • Monday

    Monday: Scattered showers. Partly sunny, with a high near 85. East southeast wind 7 to 16 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.

    High: 85 °F

    Scattered
    Showers

  • Monday Night

    Monday Night: Scattered showers, mainly before midnight. Mostly cloudy, with a low around 83. East southeast wind 6 to 9 mph. Chance of precipitation is 50%.

    Low: 83 °F

    Scattered
    Showers then
    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 85. East wind 9 to 14 mph, with gusts as high as 20 mph.

    High: 85 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 83. East wind 9 to 11 mph.

    Low: 83 °F

    Partly Cloudy

Detailed Forecast

Overnight
Scattered showers. Partly cloudy, with a low around 83. East southeast wind around 8 mph. Chance of precipitation is 30%.
Saturday
Isolated showers before 9am, then isolated showers after noon. Mostly sunny, with a high near 85. East wind 7 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Saturday Night
Showers likely, mainly after 3am. Mostly cloudy, with a low around 83. East wind 6 to 9 mph. Chance of precipitation is 60%.
Sunday
Showers likely, mainly between 9am and noon. Partly sunny, with a high near 85. East wind 7 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Sunday Night
Showers likely, mainly after midnight. Mostly cloudy, with a low around 83. Southeast wind around 8 mph. Chance of precipitation is 60%.
Monday
Scattered showers. Partly sunny, with a high near 85. East southeast wind 7 to 16 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.
Monday Night
Scattered showers, mainly before midnight. Mostly cloudy, with a low around 83. East southeast wind 6 to 9 mph. Chance of precipitation is 50%.
Tuesday
Mostly sunny, with a high near 85. East wind 9 to 14 mph, with gusts as high as 20 mph.
Tuesday Night
Partly cloudy, with a low around 83. East wind 9 to 11 mph.
Wednesday
Mostly sunny, with a high near 85.
Wednesday Night
Scattered showers. Mostly cloudy, with a low around 83. Chance of precipitation is 40%.
Thursday
Scattered showers. Partly sunny, with a high near 85. Chance of precipitation is 40%.
Thursday Night
Scattered showers. Partly cloudy, with a low around 83. Chance of precipitation is 30%.
Friday
Scattered showers. Partly sunny, with a high near 85. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WNW Loiza PR
 18.45°N 65.91°W (Elev. 7 ft)
Last Update:
3:54 am AST Sep 19, 2026
Forecast Valid:
4am AST Sep 19, 2026-6pm AST Sep 25, 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