National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

San Antonio, San Antonio International Airport (KSAT)

Lat: 29.53°NLon: 98.46°WElev: 807ft.

A Few Clouds

90°F

32°C

Humidity 44%
Wind Speed S 10 mph
Barometer 29.96 in (1012.5 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index92°F (33°C)
Last update 26 Aug 10:51 pm CDT
Extended Forecast for

Balcones Heights TX

Heat Advisory August 26, 11:45pm until August 27, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 26, 11:45pm until August 27, 07:00pm

    NOW until 7:00pm Thu

    Heat Advisory

  • Tonight

    Low: 79 °F

    Mostly Clear

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 100. Heat index values as high as 108. Calm wind becoming north around 5 mph in the afternoon.

    High: 100 °F

    Sunny then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Partly cloudy, with a low around 78. Southeast wind around 5 mph. Chance of precipitation is 30%.

    Low: 78 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 98. Heat index values as high as 106. Calm wind becoming east around 5 mph in the afternoon.

    High: 98 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 77. East southeast wind around 5 mph.

    Low: 77 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 97. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 97 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 76. South southeast wind 5 to 10 mph.

    Low: 76 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 97. South southeast wind 5 to 10 mph.

    High: 97 °F

    Sunny

Detailed Forecast

Tonight
Mostly clear, with a low around 79. South wind around 5 mph.
Thursday
A 40 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 100. Heat index values as high as 108. Calm wind becoming north around 5 mph in the afternoon.
Thursday Night
A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Partly cloudy, with a low around 78. Southeast wind around 5 mph. Chance of precipitation is 30%.
Friday
Mostly sunny, with a high near 98. Heat index values as high as 106. Calm wind becoming east around 5 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 77. East southeast wind around 5 mph.
Saturday
Sunny, with a high near 97. Calm wind becoming southeast around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 76. South southeast wind 5 to 10 mph.
Sunday
Sunny, with a high near 97. South southeast wind 5 to 10 mph.
Sunday Night
Mostly clear, with a low around 75. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Monday
Mostly sunny, with a high near 97.
Monday Night
Mostly clear, with a low around 76.
Tuesday
Mostly sunny, with a high near 98.
Tuesday Night
Mostly clear, with a low around 76.
Wednesday
Sunny, with a high near 98.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Balcones Heights TX
 29.48°N 98.56°W (Elev. 784 ft)
Last Update:
11:32 pm CDT Aug 26, 2026
Forecast Valid:
11pm CDT Aug 26, 2026-6pm CDT Sep 2, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation