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

Hazardous Weather Conditions

Current conditions at

San Antonio, San Antonio International Airport (KSAT)

Lat: 29.53°NLon: 98.46°WElev: 807ft.

Fair

85°F

29°C

Humidity 61%
Wind Speed SE 7 mph
Barometer 29.92 in (1011.1 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 21 Jul 11:51 pm CDT
Extended Forecast for

San Antonio TX

Heat Advisory July 22, 12:00pm until July 22, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Overnight

    Overnight: Mostly clear, with a low around 79. Calm wind.

    Low: 79 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 101. Heat index values as high as 109. Calm wind becoming east northeast around 5 mph in the afternoon.

    High: 101 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 85. East wind around 5 mph becoming calm in the evening.

    Low: 85 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny and hot, with a high near 99. Heat index values as high as 108. Northeast wind 5 to 10 mph.

    High: 99 °F

    Hot

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 82. East northeast wind 5 to 10 mph becoming light and variable after midnight.

    Low: 82 °F

    Partly Cloudy

  • Friday

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

    High: 96 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 79. South southeast wind 5 to 15 mph, with gusts as high as 25 mph.

    Low: 79 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 97. South wind 5 to 10 mph.

    High: 97 °F

    Sunny

  • Saturday Night

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

    Low: 76 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 79. Calm wind.
Wednesday
Sunny and hot, with a high near 101. Heat index values as high as 109. Calm wind becoming east northeast around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 85. East wind around 5 mph becoming calm in the evening.
Thursday
Mostly sunny and hot, with a high near 99. Heat index values as high as 108. Northeast wind 5 to 10 mph.
Thursday Night
Partly cloudy, with a low around 82. East northeast wind 5 to 10 mph becoming light and variable after midnight.
Friday
Mostly sunny, with a high near 96. South southeast wind around 5 mph.
Friday Night
Mostly clear, with a low around 79. South southeast wind 5 to 15 mph, with gusts as high as 25 mph.
Saturday
Sunny, with a high near 97. South wind 5 to 10 mph.
Saturday Night
Mostly clear, with a low around 76. South southeast wind 5 to 15 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 96.
Sunday Night
Mostly clear, with a low around 77.
Monday
Sunny, with a high near 97.
Monday Night
Mostly clear, with a low around 78.
Tuesday
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:
11:48 pm CDT Jul 21, 2026
Forecast Valid:
12am CDT Jul 22, 2026-6pm CDT Jul 28, 2026
 
Forecast Discussion
 
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Additional Resources

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