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

Hazardous Weather Conditions

Current conditions at

San Antonio, Stinson Municipal Airport (KSSF)

Lat: 29.34°NLon: 98.47°WElev: 574ft.

Fair

98°F

37°C

Humidity 38%
Wind Speed Vrbl 3 G 17 mph
Barometer 29.98 in (1013.6 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index104°F (40°C)
Last update 20 Aug 1:53 pm CDT
Extended Forecast for

3 Miles SE San Antonio TX

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

    NOW until 7:00pm Sun

    Heat Advisory

  • This Afternoon

    High: 102 °F

    Hot

  • Tonight

    Tonight: Partly cloudy, with a low around 78. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 78 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny and hot, with a high near 103. Heat index values as high as 108. Calm wind becoming south around 5 mph in the afternoon.

    High: 103 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 78. South southeast wind 5 to 10 mph.

    Low: 78 °F

    Mostly Clear

  • Saturday

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

    High: 103 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 78. Southeast wind 5 to 10 mph.

    Low: 78 °F

    Mostly Clear

  • Sunday

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

    High: 102 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 78. Southeast wind 5 to 10 mph.

    Low: 78 °F

    Mostly Clear

Detailed Forecast

This Afternoon
Sunny and hot, with a high near 102. Heat index values as high as 107. South southeast wind around 5 mph.
Tonight
Partly cloudy, with a low around 78. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Friday
Mostly sunny and hot, with a high near 103. Heat index values as high as 108. Calm wind becoming south around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 78. South southeast wind 5 to 10 mph.
Saturday
Sunny and hot, with a high near 103. Calm wind becoming southeast around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 78. Southeast wind 5 to 10 mph.
Sunday
Sunny and hot, with a high near 102. Calm wind becoming south southeast around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 78. Southeast wind 5 to 10 mph.
Monday
Sunny and hot, with a high near 102. South southwest wind around 5 mph.
Monday Night
Mostly clear, with a low around 77.
Tuesday
Sunny and hot, with a high near 101.
Tuesday Night
Mostly clear, with a low around 78.
Wednesday
Sunny and hot, with a high near 102.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE San Antonio TX
 29.41°N 98.48°W (Elev. 646 ft)
Last Update:
2:16 pm CDT Aug 20, 2026
Forecast Valid:
2pm CDT Aug 20, 2026-6pm CDT Aug 26, 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