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

81°F

27°C

Humidity 82%
Wind Speed SE 10 mph
Barometer 29.94 in (1012.0 mb)
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 5 Sep 1:51 am CDT
Extended Forecast for

San Antonio TX

  • Overnight

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

    Low: 78 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 97. Heat index values as high as 102. South southeast wind around 5 mph.

    High: 97 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 78. East southeast wind 5 to 10 mph.

    Low: 78 °F

    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 97. Heat index values as high as 105. Calm wind becoming east southeast around 5 mph in the afternoon.

    High: 97 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 78. South southeast wind 5 to 10 mph.

    Low: 78 °F

    Partly Cloudy

  • Labor Day

    Labor Day: Mostly sunny, with a high near 98. South southeast wind around 5 mph.

    High: 98 °F

    Mostly Sunny

  • Monday Night

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

    Low: 77 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 98. Light southeast wind increasing to 5 to 10 mph in the afternoon.

    High: 98 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 77. Southeast wind 5 to 10 mph.

    Low: 77 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 78. South southeast wind around 5 mph.
Saturday
Partly sunny, with a high near 97. Heat index values as high as 102. South southeast wind around 5 mph.
Saturday Night
Partly cloudy, with a low around 78. East southeast wind 5 to 10 mph.
Sunday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 97. Heat index values as high as 105. Calm wind becoming east southeast around 5 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 78. South southeast wind 5 to 10 mph.
Labor Day
Mostly sunny, with a high near 98. South southeast wind around 5 mph.
Monday Night
Mostly clear, with a low around 77. South southeast wind 5 to 10 mph.
Tuesday
Sunny, with a high near 98. Light southeast wind increasing to 5 to 10 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 77. Southeast wind 5 to 10 mph.
Wednesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 96.
Wednesday Night
Partly cloudy, with a low around 76.
Thursday
Mostly sunny, with a high near 96.
Thursday Night
Partly cloudy, with a low around 77.
Friday
Sunny, with a high near 98.
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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:
2:46 am CDT Sep 5, 2026
Forecast Valid:
2am CDT Sep 5, 2026-6pm CDT Sep 11, 2026
 
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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