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

Tropical Storm Edouard Impacting the Northwestern Gulf Coast; Hazardous Heat expands in the East

Tropical Storm Edouard will impact the northwestern Gulf Coast through Wednesday with gusty winds, storm surge, and heavy rainfall. Flash and river flooding will be possible, especially in southeastern Texas. Hazardous heat will expand across the central and eastern U.S. by mid-week, and daily chances for severe thunderstorms are expected from the eastern Great Lakes to the Mid-Atlantic this week. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

87°F

31°C

Humidity 59%
Wind Speed SE 8 mph
Barometer 29.92 in (1012.3 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index93°F (34°C)
Last update 1 Sep 8:56 pm CDT
Extended Forecast for

Martindale TX

  • Tonight

    Tonight: Partly cloudy, with a low around 76. East southeast wind around 5 mph becoming calm.

    Low: 76 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny and hot, with a high near 99. Heat index values as high as 104. South southwest wind around 5 mph becoming southeast in the afternoon.

    High: 99 °F

    Hot

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 77. East southeast wind 5 to 10 mph becoming south after midnight.

    Low: 77 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny and hot, with a high near 99. Heat index values as high as 103. South wind around 5 mph.

    High: 99 °F

    Hot

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 76. South wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 76 °F

    Partly Cloudy

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 97. Calm wind becoming south around 5 mph in the morning.

    High: 97 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: Partly cloudy, with a low around 75. Southeast wind 5 to 10 mph becoming light south after midnight.

    Low: 75 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 98. Calm wind becoming southeast around 5 mph.

    High: 98 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 75. East southeast wind around 5 mph becoming calm after midnight.

    Low: 75 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 76. East southeast wind around 5 mph becoming calm.
Wednesday
Sunny and hot, with a high near 99. Heat index values as high as 104. South southwest wind around 5 mph becoming southeast in the afternoon.
Wednesday Night
Partly cloudy, with a low around 77. East southeast wind 5 to 10 mph becoming south after midnight.
Thursday
Mostly sunny and hot, with a high near 99. Heat index values as high as 103. South wind around 5 mph.
Thursday Night
Partly cloudy, with a low around 76. South wind 5 to 15 mph, with gusts as high as 20 mph.
Friday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 97. Calm wind becoming south around 5 mph in the morning.
Friday Night
Partly cloudy, with a low around 75. Southeast wind 5 to 10 mph becoming light south after midnight.
Saturday
Mostly sunny, with a high near 98. Calm wind becoming southeast around 5 mph.
Saturday Night
Partly cloudy, with a low around 75. East southeast wind around 5 mph becoming calm after midnight.
Sunday
Sunny, with a high near 98.
Sunday Night
Mostly clear, with a low around 76.
Labor Day
Sunny, with a high near 98.
Monday Night
Mostly clear, with a low around 76.
Tuesday
Sunny, with a high near 98.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Martindale TX
 29.81°N 97.83°W (Elev. 489 ft)
Last Update:
8:42 pm CDT Sep 1, 2026
Forecast Valid:
9pm CDT Sep 1, 2026-6pm CDT Sep 8, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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