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.

Fair

59°F

15°C

Humidity 90%
Wind Speed S 6 mph
Barometer 29.70 in (1005.0 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 26 Feb 4:56 am CST
Extended Forecast for

San Marcos TX

  • Today

    Today: Sunny, with a high near 89. Light and variable wind becoming north northeast 10 to 15 mph in the morning. Winds could gust as high as 25 mph.

    High: 89 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 58. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 58 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 85. North northeast wind around 5 mph becoming east southeast in the afternoon.

    High: 85 °F

    Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 58. East southeast wind around 5 mph becoming calm in the evening.

    Low: 58 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Mostly sunny, with a high near 85. Light south wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 85 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 59. South wind 5 to 10 mph.

    Low: 59 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 86. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 86 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 58. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 58 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 77. East southeast wind around 10 mph, with gusts as high as 20 mph.

    High: 77 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 89. Light and variable wind becoming north northeast 10 to 15 mph in the morning. Winds could gust as high as 25 mph.
Tonight
Mostly clear, with a low around 58. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Friday
Sunny, with a high near 85. North northeast wind around 5 mph becoming east southeast in the afternoon.
Friday Night
Increasing clouds, with a low around 58. East southeast wind around 5 mph becoming calm in the evening.
Saturday
Mostly sunny, with a high near 85. Light south wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Saturday Night
Partly cloudy, with a low around 59. South wind 5 to 10 mph.
Sunday
Partly sunny, with a high near 86. South wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday Night
Partly cloudy, with a low around 58. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Monday
Mostly sunny, with a high near 77. East southeast wind around 10 mph, with gusts as high as 20 mph.
Monday Night
Mostly cloudy, with a low around 55.
Tuesday
Mostly cloudy, with a high near 77.
Tuesday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 59.
Wednesday
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 79.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
San Marcos TX
 29.88°N 97.91°W (Elev. 597 ft)
Last Update:
4:32 am CST Feb 26, 2026
Forecast Valid:
5am CST Feb 26, 2026-6pm CST Mar 4, 2026
 
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Additional Resources

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