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.

Fair

81°F

27°C

Humidity 77%
Wind Speed SE 9 mph
Barometer 30.01 in (1014.2 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 1 Sep 1:51 am CDT
Extended Forecast for

San Antonio TX

  • Overnight

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

    Low: 78 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 99. Heat index values as high as 104. Calm wind becoming east around 5 mph in the afternoon.

    High: 99 °F

    Hot

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 79. East wind around 5 mph becoming south after midnight.

    Low: 79 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny and hot, with a high near 100. Heat index values as high as 104. Calm wind becoming south southwest around 5 mph.

    High: 100 °F

    Hot

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 78. Southeast wind 5 to 10 mph.

    Low: 78 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny and hot, with a high near 99. South southeast wind 5 to 10 mph.

    High: 99 °F

    Hot

  • Thursday Night

    Thursday Night: A 20 percent chance of showers after 1am. 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
    then Slight
    Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 98. South southeast wind 5 to 10 mph.

    High: 98 °F

    Mostly Sunny

  • Friday Night

    Friday Night: 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

Detailed Forecast

Overnight
Mostly clear, with a low around 78. South southeast wind around 5 mph.
Tuesday
Sunny and hot, with a high near 99. Heat index values as high as 104. Calm wind becoming east around 5 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 79. East wind around 5 mph becoming south after midnight.
Wednesday
Sunny and hot, with a high near 100. Heat index values as high as 104. Calm wind becoming south southwest around 5 mph.
Wednesday Night
Partly cloudy, with a low around 78. Southeast wind 5 to 10 mph.
Thursday
Mostly sunny and hot, with a high near 99. South southeast wind 5 to 10 mph.
Thursday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 77. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Friday
Mostly sunny, with a high near 98. South southeast wind 5 to 10 mph.
Friday Night
Mostly clear, with a low around 77. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday
Mostly sunny, with a high near 98.
Saturday Night
Mostly clear, with a low around 77.
Sunday
Sunny, with a high near 97.
Sunday Night
Mostly clear, with a low around 77.
Labor Day
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:
1:36 am CDT Sep 1, 2026
Forecast Valid:
2am CDT Sep 1, 2026-6pm CDT Sep 7, 2026
 
Forecast Discussion
 
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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