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.

A Few Clouds

89°F

32°C

Humidity 59%
Wind Speed S 12 G 17 mph
Barometer 30.03 in (1015.1 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index97°F (36°C)
Last update 31 Jul 11:51 am CDT
Extended Forecast for

San Antonio TX

  • This Afternoon

    This Afternoon: Sunny and hot, with a high near 100. Heat index values as high as 107. South wind around 5 mph.

    High: 100 °F

    Hot

  • Tonight

    Tonight: 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

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 4pm. Sunny and hot, with a high near 99. Heat index values as high as 107. Calm wind becoming south southwest around 5 mph.

    High: 99 °F

    Sunny then
    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Increasing clouds, with a low around 79. East southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 79 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Sunday

    Sunday: Mostly sunny and hot, with a high near 99. North northwest wind around 5 mph becoming east northeast in the afternoon.

    High: 99 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 79. East northeast wind around 5 mph becoming south southwest after midnight.

    Low: 79 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 100. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 100 °F

    Hot

  • Monday Night

    Monday Night: Clear, with a low around 78. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 78 °F

    Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 99. South wind 5 to 10 mph.

    High: 99 °F

    Hot

Detailed Forecast

This Afternoon
Sunny and hot, with a high near 100. Heat index values as high as 107. South wind around 5 mph.
Tonight
Mostly clear, with a low around 77. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday
A 20 percent chance of showers and thunderstorms after 4pm. Sunny and hot, with a high near 99. Heat index values as high as 107. Calm wind becoming south southwest around 5 mph.
Saturday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Increasing clouds, with a low around 79. East southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Sunday
Mostly sunny and hot, with a high near 99. North northwest wind around 5 mph becoming east northeast in the afternoon.
Sunday Night
Mostly clear, with a low around 79. East northeast wind around 5 mph becoming south southwest after midnight.
Monday
Sunny and hot, with a high near 100. Calm wind becoming southeast around 5 mph in the afternoon.
Monday Night
Clear, with a low around 78. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday
Sunny and hot, with a high near 99. South wind 5 to 10 mph.
Tuesday Night
Mostly clear, with a low around 78.
Wednesday
Mostly sunny, with a high near 98.
Wednesday Night
Mostly clear, with a low around 77.
Thursday
Mostly sunny, with a high near 97.
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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:
11:32 am CDT Jul 31, 2026
Forecast Valid:
12pm CDT Jul 31, 2026-6pm CDT Aug 6, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation