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

79°F

26°C

Humidity 77%
Wind Speed S 9 mph
Barometer 29.96 in (1012.5 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 13 Aug 3:51 am CDT
Extended Forecast for

San Antonio TX

  • Today

    Today: Mostly cloudy, then gradually becoming sunny and hot, with a high near 101. Heat index values as high as 108. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 101 °F

    Hot

  • Tonight

    Tonight: Increasing clouds, with a low around 78. South southeast wind 10 to 15 mph, with gusts as high as 30 mph.

    Low: 78 °F

    Increasing
    Clouds

  • Friday

    Friday: Partly sunny, with a high near 98. Heat index values as high as 105. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 98 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 79. Southeast wind 5 to 15 mph, with gusts as high as 25 mph.

    Low: 79 °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. South southeast wind around 5 mph.

    High: 99 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 77. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 77 °F

    Mostly Clear

  • Monday

    Monday: 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, then gradually becoming sunny and hot, with a high near 101. Heat index values as high as 108. South wind 5 to 10 mph, with gusts as high as 20 mph.
Tonight
Increasing clouds, with a low around 78. South southeast wind 10 to 15 mph, with gusts as high as 30 mph.
Friday
Partly sunny, with a high near 98. Heat index values as high as 105. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
Partly cloudy, with a low around 79. Southeast wind 5 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. South southeast wind around 5 mph.
Sunday Night
Mostly clear, with a low around 77. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Monday
Mostly sunny and hot, with a high near 99. Calm wind becoming southeast around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 78.
Tuesday
Sunny and hot, with a high near 99.
Tuesday Night
Mostly clear, with a low around 78.
Wednesday
Sunny and hot, with a high near 100.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
San Antonio TX
 29.46°N 98.5°W (Elev. 741 ft)
Last Update:
2:46 am CDT Aug 13, 2026
Forecast Valid:
4am CDT Aug 13, 2026-6pm CDT Aug 19, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

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