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.

A Few Clouds

80°F

27°C

Humidity 79%
Wind Speed SE 12 mph
Barometer 30.04 in (1015.4 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 10 Aug 1:51 am CDT
Extended Forecast for

San Antonio TX

  • Overnight

    Overnight: Partly cloudy, with a low around 78. South southeast wind around 5 mph.

    Low: 78 °F

    Partly Cloudy

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 4pm. Mostly cloudy through mid morning, then becoming sunny, with a high near 97. Heat index values as high as 106. South southeast wind 5 to 10 mph.

    High: 97 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 78. Southeast wind around 10 mph.

    Low: 78 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Mostly sunny and hot, with a high near 99. Heat index values as high as 108. South wind 5 to 10 mph.

    High: 99 °F

    Hot

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 78. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 78 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 100. South wind 5 to 10 mph.

    High: 100 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 77. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 77 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny and hot, with a high near 100. South wind 5 to 15 mph.

    High: 100 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 78. Southeast wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 78 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 78. South southeast wind around 5 mph.
Monday
A 20 percent chance of showers and thunderstorms after 4pm. Mostly cloudy through mid morning, then becoming sunny, with a high near 97. Heat index values as high as 106. South southeast wind 5 to 10 mph.
Monday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 78. Southeast wind around 10 mph.
Tuesday
Mostly sunny and hot, with a high near 99. Heat index values as high as 108. South wind 5 to 10 mph.
Tuesday Night
Partly cloudy, with a low around 78. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Wednesday
Mostly sunny and hot, with a high near 100. South wind 5 to 10 mph.
Wednesday Night
Mostly clear, with a low around 77. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday
Mostly sunny and hot, with a high near 100. South wind 5 to 15 mph.
Thursday Night
Mostly clear, with a low around 78. Southeast wind 10 to 15 mph, with gusts as high as 25 mph.
Friday
Mostly sunny and hot, with a high near 99.
Friday Night
Partly cloudy, with a low around 78.
Saturday
Mostly sunny, with a high near 97.
Saturday Night
Mostly clear, with a low around 76.
Sunday
Mostly sunny, with a high near 98.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
San Antonio TX
 29.46°N 98.53°W (Elev. 699 ft)
Last Update:
1:26 am CDT Aug 10, 2026
Forecast Valid:
2am CDT Aug 10, 2026-6pm CDT Aug 16, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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