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

80°F

27°C

Humidity 79%
Wind Speed S 12 mph
Barometer 30.00 in (1014.0 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 12 Aug 4:51 am CDT
Extended Forecast for

San Antonio TX

  • Today

    Today: Mostly cloudy through mid morning, then gradual clearing and hot, with a high near 101. Heat index values as high as 105. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 101 °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 101. Heat index values as high as 106. South southeast wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 101 °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 and hot, with a high near 99. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 99 °F

    Hot

  • Friday Night

    Friday Night: Partly cloudy, with a low around 78. 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 10 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 101. Heat index values as high as 105. 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 101. Heat index values as high as 106. South southeast 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 and hot, with a high near 99. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
Partly cloudy, with a low around 78. 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 10 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.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
San Antonio TX
 29.44°N 98.5°W (Elev. 650 ft)
Last Update:
5:32 am CDT Aug 12, 2026
Forecast Valid:
5am CDT Aug 12, 2026-6pm CDT Aug 18, 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