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 82%
Wind Speed SW 8 mph
Barometer 30.11 in (1017.7 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 17 Aug 5:51 am CDT
Extended Forecast for

San Antonio TX

  • Today

    Today: Partly sunny, then gradually becoming sunny and hot, with a high near 100. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 100 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 77. Southeast wind 5 to 10 mph.

    Low: 77 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 100. Heat index values as high as 104. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 100 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 78. South southeast wind 5 to 10 mph.

    Low: 78 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 101. South wind around 5 mph.

    High: 101 °F

    Hot

  • Wednesday Night

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

    Low: 78 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 101. South wind around 5 mph.

    High: 101 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 79. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 79 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 101. South wind around 5 mph.

    High: 101 °F

    Hot

Detailed Forecast

Today
Partly sunny, then gradually becoming sunny and hot, with a high near 100. Calm wind becoming southeast around 5 mph in the afternoon.
Tonight
Mostly clear, with a low around 77. Southeast wind 5 to 10 mph.
Tuesday
Sunny and hot, with a high near 100. Heat index values as high as 104. Calm wind becoming south southeast around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 78. South southeast wind 5 to 10 mph.
Wednesday
Sunny and hot, with a high near 101. South wind around 5 mph.
Wednesday Night
Mostly clear, with a low around 78. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday
Sunny and hot, with a high near 101. South wind around 5 mph.
Thursday Night
Mostly clear, with a low around 79. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Friday
Sunny and hot, with a high near 101. South wind around 5 mph.
Friday Night
Mostly clear, with a low around 79.
Saturday
Sunny and hot, with a high near 101.
Saturday Night
Mostly clear, with a low around 79.
Sunday
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:
5:32 am CDT Aug 17, 2026
Forecast Valid:
6am CDT Aug 17, 2026-6pm CDT Aug 23, 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