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 85%
Wind Speed S 12 mph
Barometer 30.01 in (1014.0 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 12 Aug 5:51 am CDT
Extended Forecast for

San Antonio TX

  • Today

    Today: Mostly cloudy through mid morning, then gradual clearing and hot, with a high near 100. Heat index values as high as 104. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 100 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 77. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 77 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny and hot, with a high near 100. Heat index values as high as 105. South wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 100 °F

    Hot

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 78. Southeast wind 10 to 15 mph, with gusts as high as 30 mph.

    Low: 78 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 98. South southeast wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 98 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 78. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 78 °F

    Partly Cloudy

  • Saturday

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

    High: 99 °F

    Hot

  • Saturday Night

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

    Low: 76 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny and hot, with a high near 99. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 99 °F

    Hot

Detailed Forecast

Today
Mostly cloudy through mid morning, then gradual clearing and hot, with a high near 100. Heat index values as high as 104. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Tonight
Mostly clear, with a low around 77. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday
Mostly cloudy, then gradually becoming sunny and hot, with a high near 100. Heat index values as high as 105. South wind 5 to 15 mph, with gusts as high as 20 mph.
Thursday Night
Partly cloudy, with a low around 78. Southeast wind 10 to 15 mph, with gusts as high as 30 mph.
Friday
Mostly sunny, with a high near 98. South southeast wind 5 to 15 mph, with gusts as high as 20 mph.
Friday Night
Partly cloudy, with a low around 78. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.
Saturday
Mostly sunny and hot, with a high near 99. South southeast wind 5 to 10 mph.
Saturday Night
Partly cloudy, with a low around 76. South southeast wind 5 to 15 mph, with gusts as high as 20 mph.
Sunday
Mostly sunny and hot, with a high near 99. Calm wind becoming southeast around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 77.
Monday
Sunny and hot, with a high near 99.
Monday Night
Mostly clear, with a low around 78.
Tuesday
Sunny and hot, with a high near 99.
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ABOUT THIS FORECAST

 
Point Forecast:
San Antonio TX
 29.46°N 98.5°W (Elev. 741 ft)
Last Update:
5:32 am CDT Aug 12, 2026
Forecast Valid:
6am CDT Aug 12, 2026-6pm CDT Aug 18, 2026
 
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