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Hazardous Weather Conditions

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair and Windy

53°F

12°C

Humidity 30%
Wind Speed N 28 G 31 mph
Barometer 30.08 in (1017.9 mb)
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Wind Chill46°F (8°C)
Last update 16 Mar 12:56 am CDT
Extended Forecast for

San Marcos TX

Wind Advisory March 16, 01:46am until March 16, 05:00am
Red Flag Warning March 16, 01:46am until March 16, 08:00pm
Click here for hazard details and duration
Wind Advisory
Red Flag Warning
  •  
    Wind Advisory March 16, 01:46am until March 16, 05:00am
    Red Flag Warning March 16, 01:46am until March 16, 08:00pm

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Overnight

    Low: 41 °F

    Mostly Clear
    and Windy

  • Monday

    Monday: Increasing clouds, with a high near 57. North wind 15 to 20 mph, with gusts as high as 35 mph.

    High: 57 °F

    Increasing
    Clouds

  • Monday Night

    Monday Night: Cloudy during the early evening, then gradual clearing, with a low around 35. North northeast wind 5 to 10 mph becoming light and variable in the evening.

    Low: 35 °F

    Gradual
    Clearing

  • Tuesday

    Tuesday: Sunny, with a high near 66. Light south wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 66 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 44. South wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 44 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 77. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 77 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 52. South wind around 5 mph.

    Low: 52 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 84. Southwest wind around 5 mph.

    High: 84 °F

    Sunny

Detailed Forecast

Overnight
Mostly clear, with a low around 41. Windy, with a north wind 25 to 30 mph, with gusts as high as 45 mph.
Monday
Increasing clouds, with a high near 57. North wind 15 to 20 mph, with gusts as high as 35 mph.
Monday Night
Cloudy during the early evening, then gradual clearing, with a low around 35. North northeast wind 5 to 10 mph becoming light and variable in the evening.
Tuesday
Sunny, with a high near 66. Light south wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Tuesday Night
Partly cloudy, with a low around 44. South wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 77. South wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 52. South wind around 5 mph.
Thursday
Sunny, with a high near 84. Southwest wind around 5 mph.
Thursday Night
Clear, with a low around 56. South wind around 5 mph.
Friday
Sunny, with a high near 91.
Friday Night
Clear, with a low around 59.
Saturday
Sunny, with a high near 93.
Saturday Night
Clear, with a low around 60.
Sunday
Sunny, with a high near 92.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
San Marcos TX
 29.88°N 97.94°W (Elev. 577 ft)
Last Update:
1:24 am CDT Mar 16, 2026
Forecast Valid:
1am CDT Mar 16, 2026-6pm CDT Mar 22, 2026
 
Forecast Discussion
 
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