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.

Mostly Cloudy

86°F

30°C

Humidity 65%
Wind Speed SE 8 G 18 mph
Barometer 29.90 in (1010.6 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index93°F (34°C)
Last update 29 Sep 10:51 am CDT
Extended Forecast for

San Antonio TX

Flood Watch September 30, 07:00pm until October 2, 07:00pm
Click here for hazard details and duration
Flood Watch

  • Today

    Today: Partly sunny, with a high near 94. Heat index values as high as 101. Southeast wind around 10 mph, with gusts as high as 20 mph.

    High: 94 °F

    Partly Sunny

  • Tonight

    Tonight: A 30 percent chance of showers, mainly after 4am. Mostly cloudy, with a low around 77. Southeast wind around 15 mph, with gusts as high as 25 mph.

    Low: 77 °F

    Partly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 95. Heat index values as high as 106. South southeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.

    High: 95 °F

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 1am, then showers and possibly a thunderstorm between 1am and 4am, then showers after 4am. Low around 77. Southeast wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%.

    Low: 77 °F

    Chance
    T-storms then
    Showers

  • Thursday

    Thursday: Showers, with thunderstorms also possible after 10am. Some of the storms could produce heavy rainfall. High near 88. South southeast wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 100%.

    High: 88 °F

    Heavy Rain

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 73. East wind around 5 mph. Chance of precipitation is 100%.

    Low: 73 °F

    Heavy Rain

  • Friday

    Friday: Showers and possibly a thunderstorm. High near 81. East northeast wind around 5 mph. Chance of precipitation is 90%.

    High: 81 °F

    Showers

  • Friday Night

    Friday Night: Showers likely. Mostly cloudy, with a low around 70. North northeast wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    Low: 70 °F

    Showers
    Likely

  • Saturday

    Saturday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 82. North northeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.

    High: 82 °F

    Chance
    Showers

Detailed Forecast

Today
Partly sunny, with a high near 94. Heat index values as high as 101. Southeast wind around 10 mph, with gusts as high as 20 mph.
Tonight
A 30 percent chance of showers, mainly after 4am. Mostly cloudy, with a low around 77. Southeast wind around 15 mph, with gusts as high as 25 mph.
Wednesday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 95. Heat index values as high as 106. South southeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
Wednesday Night
A chance of showers and thunderstorms before 1am, then showers and possibly a thunderstorm between 1am and 4am, then showers after 4am. Low around 77. Southeast wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%.
Thursday
Showers, with thunderstorms also possible after 10am. Some of the storms could produce heavy rainfall. High near 88. South southeast wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 100%.
Thursday Night
Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 73. East wind around 5 mph. Chance of precipitation is 100%.
Friday
Showers and possibly a thunderstorm. High near 81. East northeast wind around 5 mph. Chance of precipitation is 90%.
Friday Night
Showers likely. Mostly cloudy, with a low around 70. North northeast wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Saturday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 82. North northeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Chance of precipitation is 40%.
Sunday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 82.
Sunday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69.
Monday
A 20 percent chance of showers. Mostly cloudy, with a high near 80.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
San Antonio TX
 29.46°N 98.5°W (Elev. 741 ft)
Last Update:
10:44 am CDT Sep 29, 2026
Forecast Valid:
10am CDT Sep 29, 2026-6pm CDT Oct 5, 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