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

Dangerous Heat over the South-Central and Southwest U.S. Through Next Week

Dangerous heat persists across the Desert Southwest through this weekend and across the Southern Plains and Lower Mississippi Valley through at least the middle of next week. Numerous daily record high temperatures are expected through at least Tuesday for much of Texas and Oklahoma as well as portions of Louisiana, New Mexico, and Arizona. Read More >

Hazardous Weather Conditions

Current conditions at

Port Lavaca - Calhoun County Airport (KPKV)

Lat: 28.65°NLon: 96.68°WElev: 27ft.

Fair

81°F

27°C

Humidity 97%
Wind Speed SW 7 mph
Barometer 30.00 in
Dewpoint 80°F (27°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 23 Aug 8:35 am CDT
Extended Forecast for

8 Miles NW Port O Connor TX

Heat Advisory August 23, 12:00pm until August 23, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Today

    Today: Sunny, with a high near 92. Heat index values as high as 103. West southwest wind 6 to 13 mph becoming south southeast in the afternoon.

    High: 92 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 81. South wind 8 to 11 mph.

    Low: 81 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 91. Heat index values as high as 105. South southeast wind 8 to 13 mph.

    High: 91 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 81. South southeast wind 10 to 13 mph.

    Low: 81 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 91. South southwest wind 7 to 13 mph.

    High: 91 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 81. South southeast wind 10 to 14 mph, with gusts as high as 18 mph.

    Low: 81 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 91. South southeast wind 8 to 14 mph.

    High: 91 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 82. South southeast wind 9 to 13 mph, with gusts as high as 18 mph.

    Low: 82 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 91. Southwest wind 7 to 14 mph.

    High: 91 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 92. Heat index values as high as 103. West southwest wind 6 to 13 mph becoming south southeast in the afternoon.
Tonight
Mostly clear, with a low around 81. South wind 8 to 11 mph.
Monday
Sunny, with a high near 91. Heat index values as high as 105. South southeast wind 8 to 13 mph.
Monday Night
Mostly clear, with a low around 81. South southeast wind 10 to 13 mph.
Tuesday
Sunny, with a high near 91. South southwest wind 7 to 13 mph.
Tuesday Night
Clear, with a low around 81. South southeast wind 10 to 14 mph, with gusts as high as 18 mph.
Wednesday
Sunny, with a high near 91. South southeast wind 8 to 14 mph.
Wednesday Night
Clear, with a low around 82. South southeast wind 9 to 13 mph, with gusts as high as 18 mph.
Thursday
Sunny, with a high near 91. Southwest wind 7 to 14 mph.
Thursday Night
Mostly clear, with a low around 82.
Friday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 90.
Friday Night
Mostly clear, with a low around 82.
Saturday
Sunny, with a high near 89.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
8 Miles NW Port O Connor TX
 28.53°N 96.51°W
Last Update:
1:46 am CDT Aug 23, 2026
Forecast Valid:
8am CDT Aug 23, 2026-6pm CDT Aug 29, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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