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

San Antonio, San Antonio International Airport (KSAT)

Lat: 29.53°NLon: 98.46°WElev: 807ft.

Mostly Cloudy

86°F

30°C

Humidity 59%
Wind Speed SE 12 mph
Barometer 30.02 in (1014.7 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index91°F (33°C)
Last update 14 Aug 8:51 pm CDT
Extended Forecast for

San Antonio International Airport TX

  • Tonight

    Tonight: Partly cloudy, with a low around 78. South southeast wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 78 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny and hot, with a high near 99. Heat index values as high as 107. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 99 °F

    Hot

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 76. South southeast wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 76 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly sunny and hot, with a high near 99. Heat index values as high as 106. South southeast wind around 5 mph.

    High: 99 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 76. 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 99. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 99 °F

    Hot

  • Monday Night

    Monday Night: Clear, with a low around 77. Southeast wind 5 to 10 mph.

    Low: 77 °F

    Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 100. South wind around 5 mph.

    High: 100 °F

    Hot

  • Tuesday Night

    Tuesday 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

Detailed Forecast

Tonight
Partly cloudy, with a low around 78. South southeast wind 5 to 15 mph, with gusts as high as 20 mph.
Saturday
Mostly cloudy, then gradually becoming sunny and hot, with a high near 99. Heat index values as high as 107. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday Night
Increasing clouds, with a low around 76. South southeast wind 5 to 15 mph, with gusts as high as 20 mph.
Sunday
Mostly sunny and hot, with a high near 99. Heat index values as high as 106. South southeast wind around 5 mph.
Sunday Night
Mostly clear, with a low around 76. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Monday
Sunny and hot, with a high near 99. Calm wind becoming south southeast around 5 mph in the afternoon.
Monday Night
Clear, with a low around 77. Southeast wind 5 to 10 mph.
Tuesday
Sunny and hot, with a high near 100. South wind around 5 mph.
Tuesday Night
Mostly clear, with a low around 77. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday
Sunny and hot, with a high near 101.
Wednesday Night
Clear, with a low around 77.
Thursday
Sunny and hot, with a high near 101.
Thursday Night
Mostly clear, with a low around 77.
Friday
Mostly sunny and hot, with a high near 100.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
San Antonio International Airport TX
 29.53°N 98.45°W (Elev. 771 ft)
Last Update:
6:42 pm CDT Aug 14, 2026
Forecast Valid:
9pm CDT Aug 14, 2026-6pm CDT Aug 21, 2026
 
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