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Webinar on Heavy Rainfall and Flooding Threat for This Week - September 30, 2026

Watch our September 30, 2026, webinar regarding the heavy rainfall and flooding threat for South-Central Texas this week. A new webinar will be available around midday on Thursday. Read More >

Hazardous Weather Conditions

Current conditions at

San Antonio, San Antonio International Airport (KSAT)

Lat: 29.53°NLon: 98.46°WElev: 807ft.

Overcast

79°F

26°C

Humidity 90%
Wind Speed S 10 mph
Barometer 29.77 in (1006.2 mb)
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 1 Oct 5:51 am CDT
Extended Forecast for

Balcones Heights TX

Flood Watch October 1, 06:42am until October 2, 07:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch October 1, 06:42am until October 2, 07:00pm

    NOW until 7:00pm Fri

    Flood Watch

  • Today

    High: 86 °F

    Showers then
    T-storms

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 10pm, then showers and thunderstorms likely between 10pm and 1am, then showers and possibly a thunderstorm after 1am. Low around 72. East southeast wind around 5 mph becoming calm. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.

    Low: 72 °F

    T-storms

  • Friday

    Friday: Showers and possibly a thunderstorm before 10am, then showers likely between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. High near 80. North northeast wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 80 °F

    Showers

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 70 °F

    Chance
    Showers

  • Saturday

    Saturday: A chance of showers before 1pm, then a chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers after 4pm. Cloudy, with a high near 80. North northeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.

    High: 80 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 68. North wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 68 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 81. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 81 °F

    Mostly Cloudy
    then Chance
    Showers

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 69. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 69 °F

    Mostly Cloudy

Detailed Forecast

Today
Showers and possibly a thunderstorm. High near 86. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Tonight
Showers and possibly a thunderstorm before 10pm, then showers and thunderstorms likely between 10pm and 1am, then showers and possibly a thunderstorm after 1am. Low around 72. East southeast wind around 5 mph becoming calm. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.
Friday
Showers and possibly a thunderstorm before 10am, then showers likely between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. High near 80. North northeast wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Friday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.
Saturday
A chance of showers before 1pm, then a chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers after 4pm. Cloudy, with a high near 80. North northeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
Saturday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 68. North wind 10 to 15 mph, with gusts as high as 20 mph.
Sunday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 81. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday Night
Mostly cloudy, with a low around 69. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.
Monday
Partly sunny, with a high near 82. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.
Monday Night
Partly cloudy, with a low around 66.
Tuesday
Sunny, with a high near 83.
Tuesday Night
Mostly clear, with a low around 66.
Wednesday
Sunny, with a high near 83.
Basemap Options
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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:
5:32 am CDT Oct 1, 2026
Forecast Valid:
6am CDT Oct 1, 2026-6pm CDT Oct 7, 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