National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

San Antonio, San Antonio International Airport (KSAT)

Lat: 29.53°NLon: 98.46°WElev: 807ft.

Partly Cloudy

93°F

34°C

Humidity 42%
Wind Speed S 6 mph
Barometer 30.08 in (1016.7 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Heat Index96°F (36°C)
Last update 22 Aug 11:51 am CDT
Extended Forecast for

San Antonio TX

Heat Advisory August 22, 11:53am until August 23, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 22, 11:53am until August 23, 07:00pm

    NOW until 7:00pm Sun

    Heat Advisory

  • Today

    High: 103 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 78. Southeast wind around 5 mph becoming southwest after midnight.

    Low: 78 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 103. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 103 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 76. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 76 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 102. Southwest wind around 5 mph becoming south southeast in the afternoon.

    High: 102 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 77. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 77 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 102. South wind around 5 mph.

    High: 102 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 78. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 78 °F

    Mostly Clear

Detailed Forecast

Today
Sunny and hot, with a high near 103. Heat index values as high as 108. Calm wind becoming east southeast around 5 mph in the afternoon.
Tonight
Mostly clear, with a low around 78. Southeast wind around 5 mph becoming southwest after midnight.
Sunday
Sunny and hot, with a high near 103. Calm wind becoming southeast around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 76. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Monday
Sunny and hot, with a high near 102. Southwest wind around 5 mph becoming south southeast in the afternoon.
Monday Night
Mostly clear, with a low around 77. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday
Sunny and hot, with a high near 102. South wind around 5 mph.
Tuesday Night
Mostly clear, with a low around 78. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday
Sunny and hot, with a high near 103. South southwest wind around 5 mph.
Wednesday Night
Mostly clear, with a low around 79.
Thursday
Sunny and hot, with a high near 102.
Thursday Night
Mostly clear, with a low around 79.
Friday
Sunny and hot, with a high near 101.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
San Antonio TX
 29.46°N 98.5°W (Elev. 741 ft)
Last Update:
11:46 am CDT Aug 22, 2026
Forecast Valid:
11am CDT Aug 22, 2026-6pm CDT Aug 28, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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