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

80°F

27°C

Humidity 82%
Wind Speed S 8 mph
Barometer 29.94 in (1011.7 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 11 Sep 2:51 am CDT
Extended Forecast for

San Antonio TX

  • Overnight

    Overnight: Mostly cloudy, with a low around 78. South wind around 5 mph.

    Low: 78 °F

    Mostly Cloudy

  • Friday

    Friday: 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

  • Friday Night

    Friday Night: 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

  • Saturday

    Saturday: Sunny and hot, with a high near 100. Heat index values as high as 107. South southeast wind 5 to 10 mph.

    High: 100 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 77. Southeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 77 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny and hot, with a high near 99. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 99 °F

    Hot

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 77. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 77 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny and hot, with a high near 99. South southeast wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 99 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 77. Southeast wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 77 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 78. South wind around 5 mph.
Friday
Mostly sunny and hot, with a high near 99. Heat index values as high as 106. South southeast wind around 5 mph.
Friday Night
Partly cloudy, with a low around 78. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday
Sunny and hot, with a high near 100. Heat index values as high as 107. South southeast wind 5 to 10 mph.
Saturday Night
Mostly clear, with a low around 77. Southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Sunday
Mostly sunny and hot, with a high near 99. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday Night
Partly cloudy, with a low around 77. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Monday
Mostly sunny and hot, with a high near 99. South southeast wind 5 to 15 mph, with gusts as high as 25 mph.
Monday Night
Mostly clear, with a low around 77. Southeast wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday
Mostly sunny and hot, with a high near 99.
Tuesday Night
Mostly clear, with a low around 76.
Wednesday
Mostly sunny, with a high near 97.
Wednesday Night
Partly cloudy, with a low around 77.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 96.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
San Antonio TX
 29.46°N 98.5°W (Elev. 741 ft)
Last Update:
2:42 am CDT Sep 11, 2026
Forecast Valid:
3am CDT Sep 11, 2026-6pm CDT Sep 17, 2026
 
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Additional Resources

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Chance of Precipitation