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.

Fog/Mist

68°F

20°C

Humidity 93%
Wind Speed SW 9 mph
Barometer 29.72 in (1005.7 mb)
Dewpoint 66°F (19°C)
Visibility 2.00 mi
Last update 19 Feb 7:56 am CST
Extended Forecast for

5 Miles SW San Marcos TX

  • Today

    Today: Patchy fog before 9am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 85. West southwest wind around 5 mph becoming northeast in the afternoon.

    High: 85 °F

    Patchy Fog
    then Sunny

  • Tonight

    Tonight: Patchy fog after 3am. Otherwise, increasing clouds, with a low around 59. East wind around 5 mph becoming calm.

    Low: 59 °F

    Mostly Clear
    then Patchy
    Fog

  • Friday

    Friday: Patchy fog before 10am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 77. North northeast wind around 5 mph becoming southeast in the afternoon.

    High: 77 °F

    Patchy Fog
    then Partly
    Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 59. Southeast wind around 5 mph becoming northwest after midnight.

    Low: 59 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 77. North wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 77 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 43. North wind around 15 mph, with gusts as high as 25 mph.

    Low: 43 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 64. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 64 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 39. North northeast wind 5 to 10 mph.

    Low: 39 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 64. North northeast wind 5 to 10 mph becoming east in the afternoon.

    High: 64 °F

    Sunny

Detailed Forecast

Today
Patchy fog before 9am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 85. West southwest wind around 5 mph becoming northeast in the afternoon.
Tonight
Patchy fog after 3am. Otherwise, increasing clouds, with a low around 59. East wind around 5 mph becoming calm.
Friday
Patchy fog before 10am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 77. North northeast wind around 5 mph becoming southeast in the afternoon.
Friday Night
Mostly cloudy, with a low around 59. Southeast wind around 5 mph becoming northwest after midnight.
Saturday
Mostly sunny, with a high near 77. North wind 5 to 15 mph, with gusts as high as 25 mph.
Saturday Night
Mostly clear, with a low around 43. North wind around 15 mph, with gusts as high as 25 mph.
Sunday
Sunny, with a high near 64. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday Night
Partly cloudy, with a low around 39. North northeast wind 5 to 10 mph.
Monday
Sunny, with a high near 64. North northeast wind 5 to 10 mph becoming east in the afternoon.
Monday Night
Mostly clear, with a low around 38.
Tuesday
Mostly sunny, with a high near 72.
Tuesday Night
Partly cloudy, with a low around 52.
Wednesday
Partly sunny, with a high near 83.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SW San Marcos TX
 29.83°N 97.99°W (Elev. 676 ft)
Last Update:
7:45 am CST Feb 19, 2026
Forecast Valid:
8am CST Feb 19, 2026-6pm CST Feb 25, 2026
 
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