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.

Fair

83°F

28°C

Humidity 61%
Wind Speed S 7 mph
Barometer 29.98 in (1013.1 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 27 Aug 2:51 am CDT
Extended Forecast for

Kirby TX

Heat Advisory August 27, 03:28am until August 27, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 27, 03:28am until August 27, 07:00pm

    NOW until 7:00pm Thu

    Heat Advisory

  • Overnight

    Low: 78 °F

    Mostly Clear

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms, mainly after 4pm. Sunny and hot, with a high near 101. Heat index values as high as 105. Southwest wind around 5 mph becoming calm.

    High: 101 °F

    Sunny then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms, mainly before 10pm. Partly cloudy, with a low around 77. South southeast wind around 5 mph becoming northwest after midnight.

    Low: 77 °F

    Chance
    T-storms

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 99. Heat index values as high as 105. Calm wind becoming east around 5 mph in the afternoon.

    High: 99 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: Mostly clear, with a low around 77. South southeast wind 5 to 10 mph.

    Low: 77 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 98. Calm wind becoming east southeast around 5 mph in the afternoon.

    High: 98 °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 and hot, with a high near 99. Southeast wind 5 to 10 mph.

    High: 99 °F

    Hot

Detailed Forecast

Overnight
Mostly clear, with a low around 78. South southwest wind around 5 mph.
Thursday
A 40 percent chance of showers and thunderstorms, mainly after 4pm. Sunny and hot, with a high near 101. Heat index values as high as 105. Southwest wind around 5 mph becoming calm.
Thursday Night
A 30 percent chance of showers and thunderstorms, mainly before 10pm. Partly cloudy, with a low around 77. South southeast wind around 5 mph becoming northwest after midnight.
Friday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 99. Heat index values as high as 105. Calm wind becoming east around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 77. South southeast wind 5 to 10 mph.
Saturday
Sunny, with a high near 98. Calm wind becoming east 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 and hot, with a high near 99. Southeast wind 5 to 10 mph.
Sunday Night
Mostly clear, with a low around 75. Southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Monday
Mostly sunny, with a high near 98.
Monday Night
Mostly clear, with a low around 75.
Tuesday
Mostly sunny and hot, with a high near 99.
Tuesday Night
Mostly clear, with a low around 76.
Wednesday
Mostly sunny, with a high near 98.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Kirby TX
 29.46°N 98.37°W (Elev. 728 ft)
Last Update:
2:42 am CDT Aug 27, 2026
Forecast Valid:
3am CDT Aug 27, 2026-6pm CDT Sep 2, 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