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

86°F

30°C

Humidity 46%
Wind Speed SE 12 mph
Barometer 30.03 in (1015.0 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 21 Aug 11:51 pm CDT
Extended Forecast for

4 Miles ENE San Antonio International Airport TX

Heat Advisory August 22, 12:39am until August 23, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 22, 12:39am until August 23, 07:00pm

    NOW until 7:00pm Sun

    Heat Advisory

  • Overnight

    Low: 78 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 103. Heat index values as high as 109. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 103 °F

    Hot

  • Saturday Night

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

    Low: 78 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 103. Heat index values as high as 108. West southwest wind around 5 mph becoming south southeast in the afternoon.

    High: 103 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 77. South southeast wind 5 to 10 mph.

    Low: 77 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 102. South southwest wind 5 to 10 mph.

    High: 102 °F

    Hot

  • Monday Night

    Monday Night: Clear, with a low around 77. South southeast wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 77 °F

    Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 103. South wind around 5 mph.

    High: 103 °F

    Hot

Detailed Forecast

Overnight
Mostly clear, with a low around 78. South southwest wind around 5 mph.
Saturday
Sunny and hot, with a high near 103. Heat index values as high as 109. Calm wind becoming south southeast around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 78. South southeast wind 5 to 10 mph.
Sunday
Sunny and hot, with a high near 103. Heat index values as high as 108. West southwest wind around 5 mph becoming south southeast in the afternoon.
Sunday Night
Mostly clear, with a low around 77. South southeast wind 5 to 10 mph.
Monday
Sunny and hot, with a high near 102. South southwest wind 5 to 10 mph.
Monday Night
Clear, with a low around 77. South southeast wind 5 to 15 mph, with gusts as high as 20 mph.
Tuesday
Sunny and hot, with a high near 103. South wind around 5 mph.
Tuesday Night
Clear, with a low around 78. South southeast wind 10 to 15 mph.
Wednesday
Sunny and hot, with a high near 102.
Wednesday Night
Mostly clear, with a low around 78.
Thursday
Sunny and hot, with a high near 101.
Thursday Night
A 20 percent chance of showers. Mostly clear, with a low around 78.
Friday
Mostly sunny and hot, with a high near 101.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles ENE San Antonio International Airport TX
 29.57°N 98.43°W (Elev. 797 ft)
Last Update:
11:32 pm CDT Aug 21, 2026
Forecast Valid:
12am CDT Aug 22, 2026-6pm CDT Aug 28, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation