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

28°C

82°F

Humidity 77%
Wind Speed E 11 km/h
Barometer 1018.4 mb (30.08 in)
Dewpoint 23°C (74°F)
Visibility 16 km
Heat Index31°C (88°F)
Last update 3 Jul 7:56 am AST
Extended Forecast for

Loiza PR

Heat Advisory July 3, 10:00am until July 3, 04:00pm
Click here for hazard details and duration
Heat Advisory

  • Today

    Today: Scattered showers. Mostly sunny, with a high near 31. East wind 16 to 24 km/h. Chance of precipitation is 30%.

    High: 31 °C

    Scattered
    Showers

  • Tonight

    Tonight: Scattered showers, mainly after 3am. Partly cloudy, with a low around 27. East southeast wind 13 to 16 km/h. Chance of precipitation is 30%.

    Low: 27 °C

    Scattered
    Showers

  • Independence Day

    Independence Day: Scattered showers and thunderstorms, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 31. East wind 16 to 24 km/h, with gusts as high as 32 km/h. Chance of precipitation is 70%. New rainfall amounts between 2 and 3 cm possible.

    High: 31 °C

    Showers
    Likely

  • Friday Night

    Friday Night: Scattered showers, mainly after midnight. Widespread haze before midnight. Partly cloudy, with a low around 27. East wind 18 to 21 km/h. Chance of precipitation is 30%.

    Low: 27 °C

    Scattered
    Showers

  • Saturday

    Saturday: Scattered showers. Partly sunny, with a high near 31. East wind 16 to 21 km/h increasing to 22 to 27 km/h in the afternoon. Winds could gust as high as 35 km/h. Chance of precipitation is 40%.

    High: 31 °C

    Scattered
    Showers

  • Saturday Night

    Saturday Night: Scattered showers. Partly cloudy, with a low around 27. East wind 16 to 21 km/h. Chance of precipitation is 30%.

    Low: 27 °C

    Scattered
    Showers

  • Sunday

    Sunday: Widespread haze. Sunny, with a high near 31. East wind 21 to 24 km/h.

    High: 31 °C

    Haze

  • Sunday Night

    Sunday Night: Widespread haze. Mostly clear, with a low around 26. East wind 16 to 18 km/h.

    Low: 26 °C

    Haze

  • Monday

    Monday: Scattered showers. Mostly sunny, with a high near 31. East wind 24 to 29 km/h, with gusts as high as 37 km/h. Chance of precipitation is 40%.

    High: 31 °C

    Scattered
    Showers

Detailed Forecast

Today
Scattered showers. Mostly sunny, with a high near 31. East wind 16 to 24 km/h. Chance of precipitation is 30%.
Tonight
Scattered showers, mainly after 3am. Partly cloudy, with a low around 27. East southeast wind 13 to 16 km/h. Chance of precipitation is 30%.
Independence Day
Scattered showers and thunderstorms, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 31. East wind 16 to 24 km/h, with gusts as high as 32 km/h. Chance of precipitation is 70%. New rainfall amounts between 2 and 3 cm possible.
Friday Night
Scattered showers, mainly after midnight. Widespread haze before midnight. Partly cloudy, with a low around 27. East wind 18 to 21 km/h. Chance of precipitation is 30%.
Saturday
Scattered showers. Partly sunny, with a high near 31. East wind 16 to 21 km/h increasing to 22 to 27 km/h in the afternoon. Winds could gust as high as 35 km/h. Chance of precipitation is 40%.
Saturday Night
Scattered showers. Partly cloudy, with a low around 27. East wind 16 to 21 km/h. Chance of precipitation is 30%.
Sunday
Widespread haze. Sunny, with a high near 31. East wind 21 to 24 km/h.
Sunday Night
Widespread haze. Mostly clear, with a low around 26. East wind 16 to 18 km/h.
Monday
Scattered showers. Mostly sunny, with a high near 31. East wind 24 to 29 km/h, with gusts as high as 37 km/h. Chance of precipitation is 40%.
Monday Night
Clear, with a low around 26.
Tuesday
Scattered showers. Mostly sunny, with a high near 31. Chance of precipitation is 30%.
Tuesday Night
Mostly clear, with a low around 26.
Wednesday
Scattered showers. Mostly sunny, with a high near 30. Chance of precipitation is 50%.
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ABOUT THIS FORECAST

 
Point Forecast:
Loiza PR
 18.44°N 65.89°W (Elev. 3 m)
Last Update:
3:31 am AST Jul 3, 2025
Forecast Valid:
8am AST Jul 3, 2025-6pm AST Jul 9, 2025
 
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