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.

Partly Cloudy

90°F

32°C

Humidity 63%
Wind Speed NE 18 mph
Barometer 29.99 in
Dewpoint 75°F (24°C)
Visibility 9.00 mi
Heat Index101°F (38°C)
Last update 18 Aug 2:56 pm AST
Extended Forecast for

2 Miles SE Vega Alta PR

Heat Advisory until August 18, 05:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory until August 18, 05:00pm

    NOW until 5:00pm Tue

    Heat Advisory

  • This Afternoon

    High: 90 °F

    Scattered
    Showers

  • Tonight

    Tonight: Isolated showers before 9pm, then isolated showers after 3am. Mostly clear, with a low around 76. East wind 5 to 9 mph. Chance of precipitation is 10%.

    Low: 76 °F

    Isolated
    Showers

  • Wednesday

    Wednesday: Scattered showers, mainly after noon. Mostly sunny, with a high near 88. Heat index values as high as 102. East southeast wind 7 to 14 mph. Chance of precipitation is 30%.

    High: 88 °F

    Scattered
    Showers

  • Wednesday Night

    Wednesday Night: Scattered showers and thunderstorms before 9pm, then scattered showers between 9pm and 3am. Partly cloudy, with a low around 76. East southeast wind around 8 mph. Chance of precipitation is 40%.

    Low: 76 °F

    Scattered
    Showers

  • Thursday

    Thursday: Scattered showers after noon. Mostly sunny, with a high near 90. East wind 10 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.

    High: 90 °F

    Sunny then
    Scattered
    Showers

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 76. East wind 8 to 10 mph.

    Low: 76 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 90. East northeast wind 14 to 17 mph.

    High: 90 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 76. East wind 7 to 9 mph.

    Low: 76 °F

    Partly Cloudy

Detailed Forecast

This Afternoon
Scattered showers. Partly sunny, with a high near 90. East northeast wind around 15 mph. Chance of precipitation is 40%.
Tonight
Isolated showers before 9pm, then isolated showers after 3am. Mostly clear, with a low around 76. East wind 5 to 9 mph. Chance of precipitation is 10%.
Wednesday
Scattered showers, mainly after noon. Mostly sunny, with a high near 88. Heat index values as high as 102. East southeast wind 7 to 14 mph. Chance of precipitation is 30%.
Wednesday Night
Scattered showers and thunderstorms before 9pm, then scattered showers between 9pm and 3am. Partly cloudy, with a low around 76. East southeast wind around 8 mph. Chance of precipitation is 40%.
Thursday
Scattered showers after noon. Mostly sunny, with a high near 90. East wind 10 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
Thursday Night
Mostly clear, with a low around 76. East wind 8 to 10 mph.
Friday
Sunny, with a high near 90. East northeast wind 14 to 17 mph.
Friday Night
Partly cloudy, with a low around 76. East wind 7 to 9 mph.
Saturday
Mostly sunny, with a high near 89. East northeast wind 7 to 15 mph.
Saturday Night
Mostly clear, with a low around 77.
Sunday
Scattered showers. Mostly sunny, with a high near 90. Chance of precipitation is 30%.
Sunday Night
Partly cloudy, with a low around 77.
Monday
Mostly sunny, with a high near 90.
Monday Night
Mostly clear, with a low around 77.
Tuesday
Scattered showers. Mostly sunny, with a high near 90.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SE Vega Alta PR
 18.39°N 66.31°W (Elev. 325 ft)
Last Update:
3:00 pm AST Aug 18, 2026
Forecast Valid:
4pm AST Aug 18, 2026-6pm AST Aug 25, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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