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

79°F

26°C

Humidity 88%
Wind Speed SE 10 G 18 mph
Barometer 30.06 in (1015.9 mb)
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 15 Sep 7:51 am CDT
Extended Forecast for

San Antonio TX

  • Today

    Today: Partly sunny, then gradually becoming sunny and hot, with a high near 100. Heat index values as high as 103. South southeast wind 5 to 10 mph.

    High: 100 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 77. Southeast wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 77 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 98. Heat index values as high as 104. East southeast wind 5 to 10 mph.

    High: 98 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 78. East southeast wind 5 to 10 mph becoming light east after midnight.

    Low: 78 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 96. East wind 5 to 10 mph. Chance of precipitation is 20%.

    High: 96 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 76. East southeast wind 5 to 10 mph.

    Low: 76 °F

    Slight Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 96. East southeast wind around 5 mph.

    High: 96 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 75. East southeast wind 5 to 10 mph becoming light south southeast after midnight.

    Low: 75 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 96. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 96 °F

    Sunny

Detailed Forecast

Today
Partly sunny, then gradually becoming sunny and hot, with a high near 100. Heat index values as high as 103. South southeast wind 5 to 10 mph.
Tonight
Mostly clear, with a low around 77. Southeast wind 5 to 15 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 98. Heat index values as high as 104. East southeast wind 5 to 10 mph.
Wednesday Night
Partly cloudy, with a low around 78. East southeast wind 5 to 10 mph becoming light east after midnight.
Thursday
A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 96. East wind 5 to 10 mph. Chance of precipitation is 20%.
Thursday Night
A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 76. East southeast wind 5 to 10 mph.
Friday
Mostly sunny, with a high near 96. East southeast wind around 5 mph.
Friday Night
Mostly clear, with a low around 75. East southeast wind 5 to 10 mph becoming light south southeast after midnight.
Saturday
Sunny, with a high near 96. Calm wind becoming southeast around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 76.
Sunday
Mostly sunny, with a high near 97.
Sunday Night
A 20 percent chance of showers. Partly cloudy, with a low around 76.
Monday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 94.
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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:
6:42 am CDT Sep 15, 2026
Forecast Valid:
8am CDT Sep 15, 2026-6pm CDT Sep 21, 2026
 
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Additional Resources

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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