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

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Partly Cloudy

79°F

26°C

Humidity 74%
Wind Speed S 8 mph
Barometer 29.96 in (1013.9 mb)
Dewpoint 70°F (21°C)
Visibility 3.00 mi
Heat Index82°F (28°C)
Last update 9 Mar 3:56 pm CDT
Extended Forecast for

5 Miles WSW Martindale TX

  • This Afternoon

    This Afternoon: A 20 percent chance of showers. Partly sunny, with a high near 79. South wind around 10 mph, with gusts as high as 20 mph.

    High: 79 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: A 10 percent chance of showers before 7pm. Mostly cloudy, with a low around 68. South southeast wind around 10 mph.

    Low: 68 °F

    Slight Chance
    Showers then
    Cloudy

  • Tuesday

    Tuesday: Cloudy, with a high near 84. South wind 10 to 20 mph, with gusts as high as 30 mph.

    High: 84 °F

    Cloudy

  • Tuesday Night

    Tuesday Night: A slight chance of showers before 10pm, then a slight chance of showers and thunderstorms between 10pm and 1am, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 64. South southeast wind 10 to 20 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.

    Low: 64 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm before 1pm, then a slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 81. Light and variable wind becoming west northwest 10 to 15 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 60%.

    High: 81 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 49. North wind 15 to 20 mph, with gusts as high as 30 mph.

    Low: 49 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 70. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 70 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 46. East northeast wind around 5 mph becoming calm in the evening.

    Low: 46 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 81. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 81 °F

    Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of showers. Partly sunny, with a high near 79. South wind around 10 mph, with gusts as high as 20 mph.
Tonight
A 10 percent chance of showers before 7pm. Mostly cloudy, with a low around 68. South southeast wind around 10 mph.
Tuesday
Cloudy, with a high near 84. South wind 10 to 20 mph, with gusts as high as 30 mph.
Tuesday Night
A slight chance of showers before 10pm, then a slight chance of showers and thunderstorms between 10pm and 1am, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 64. South southeast wind 10 to 20 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.
Wednesday
Showers likely and possibly a thunderstorm before 1pm, then a slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 81. Light and variable wind becoming west northwest 10 to 15 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 60%.
Wednesday Night
Mostly clear, with a low around 49. North wind 15 to 20 mph, with gusts as high as 30 mph.
Thursday
Sunny, with a high near 70. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday Night
Clear, with a low around 46. East northeast wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 81. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
Clear, with a low around 54.
Saturday
Sunny, with a high near 86.
Saturday Night
Mostly clear, with a low around 60.
Sunday
Mostly sunny, with a high near 89.
Sunday Night
Partly cloudy, with a low around 55.
Monday
Partly sunny, with a high near 74.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WSW Martindale TX
 29.81°N 97.91°W (Elev. 581 ft)
Last Update:
3:46 pm CDT Mar 9, 2026
Forecast Valid:
4pm CDT Mar 9, 2026-6pm CDT Mar 16, 2026
 
Forecast Discussion
 
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Additional Resources

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