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

78°F

26°C

Humidity 82%
Wind Speed S 8 mph
Barometer 29.97 in (1013.2 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 20 Sep 1:51 am CDT
Extended Forecast for

Spring Branch TX

  • Overnight

    Overnight: Mostly cloudy, with a low around 72. South wind around 5 mph.

    Low: 72 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 96. Heat index values as high as 102. Calm wind becoming south southwest around 5 mph in the morning.

    High: 96 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 73. South southeast wind around 5 mph becoming calm after midnight.

    Low: 73 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 96. Heat index values as high as 103. Calm wind becoming east southeast around 5 mph in the afternoon.

    High: 96 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 73. East southeast wind around 5 mph becoming calm in the evening.

    Low: 73 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Tuesday

    Tuesday: Sunny, with a high near 96. Light and variable wind becoming east 5 to 10 mph in the afternoon.

    High: 96 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 73. East southeast wind around 5 mph becoming calm in the evening.

    Low: 73 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 96. Light and variable wind becoming east 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 96 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 72. East wind around 5 mph becoming calm after midnight.

    Low: 72 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 72. South wind around 5 mph.
Sunday
Mostly sunny, with a high near 96. Heat index values as high as 102. Calm wind becoming south southwest around 5 mph in the morning.
Sunday Night
Partly cloudy, with a low around 73. South southeast wind around 5 mph becoming calm after midnight.
Monday
Mostly sunny, with a high near 96. Heat index values as high as 103. Calm wind becoming east southeast around 5 mph in the afternoon.
Monday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 73. East southeast wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 96. Light and variable wind becoming east 5 to 10 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 73. East southeast wind around 5 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 96. Light and variable wind becoming east 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 72. East wind around 5 mph becoming calm after midnight.
Thursday
Mostly sunny, with a high near 95.
Thursday Night
Partly cloudy, with a low around 71.
Friday
Mostly sunny, with a high near 94.
Friday Night
Partly cloudy, with a low around 70.
Saturday
Mostly sunny, with a high near 94.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Spring Branch TX
 29.87°N 98.41°W (Elev. 1040 ft)
Last Update:
2:46 am CDT Sep 20, 2026
Forecast Valid:
3am CDT Sep 20, 2026-6pm CDT Sep 26, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation