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 S 6 mph
Barometer 30.09 in (1017.0 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 18 Aug 1:51 am CDT
Extended Forecast for

San Antonio TX

  • Overnight

    Overnight: Mostly clear, with a low around 77. South wind around 5 mph.

    Low: 77 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny and hot, with a high near 100. Heat index values as high as 103. Calm wind becoming south around 5 mph in the afternoon.

    High: 100 °F

    Hot

  • Tuesday Night

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

    Low: 78 °F

    Partly Cloudy

  • Wednesday

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

    High: 101 °F

    Hot

  • Wednesday Night

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

    Low: 78 °F

    Partly Cloudy

  • 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

  • Friday Night

    Friday Night: Mostly clear, with a low around 80. Southeast wind around 5 mph.

    Low: 80 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 77. South wind around 5 mph.
Tuesday
Mostly sunny and hot, with a high near 100. Heat index values as high as 103. Calm wind becoming south around 5 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 78. South southeast wind 5 to 10 mph.
Wednesday
Increasing clouds and hot, with a high near 101. South southwest wind around 5 mph.
Wednesday Night
Partly cloudy, 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 80. Southeast wind around 5 mph.
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 101.
Sunday Night
Mostly clear, with a low around 78.
Monday
Sunny and hot, with a high near 100.
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ABOUT THIS FORECAST

 
Point Forecast:
San Antonio TX
 29.46°N 98.5°W (Elev. 741 ft)
Last Update:
2:42 am CDT Aug 18, 2026
Forecast Valid:
2am CDT Aug 18, 2026-6pm CDT Aug 24, 2026
 
Forecast Discussion
 
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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