Coastal Threats for the East and Gulf; Record Warmth for the Central U.S.

Persistent onshore flow across the Southeast and portions of the mid-Atlantic will keep the risk of rip currents through the weekend. Rainfall could be locally heavy across Florida, especially along the eastern shoreline. Meanwhile, record warmth for portions of the Plains and Midwest with elevated fire concerns. For the west, a trough will keep the pattern unsettled with wet conditions. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

75°F

24°C

Humidity 76%
Wind Speed NE 3 mph
Barometer 30.05 in (1016.8 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 4 Oct 8:56 am CDT
Extended Forecast for

San Marcos TX

  • Today

    Today: Sunny, with a high near 92. East wind 5 to 10 mph.

    High: 92 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 67. East southeast wind around 5 mph becoming calm  after midnight.

    Low: 67 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 92. East wind 5 to 10 mph.

    High: 92 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 68. East wind around 5 mph becoming calm  in the evening.

    Low: 68 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 92. Calm wind becoming east around 5 mph in the morning.

    High: 92 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 70. East southeast wind around 5 mph becoming calm  in the evening.

    Low: 70 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers after 1pm.  Mostly sunny, with a high near 91. Calm wind becoming east around 5 mph in the afternoon.

    High: 91 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 71. East wind around 5 mph becoming calm  in the evening.

    Low: 71 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 1pm.  Mostly sunny, with a high near 92. East northeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 92 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 92. East wind 5 to 10 mph.
Tonight
Mostly clear, with a low around 67. East southeast wind around 5 mph becoming calm after midnight.
Sunday
Sunny, with a high near 92. East wind 5 to 10 mph.
Sunday Night
Partly cloudy, with a low around 68. East wind around 5 mph becoming calm in the evening.
Monday
Mostly sunny, with a high near 92. Calm wind becoming east around 5 mph in the morning.
Monday Night
Partly cloudy, with a low around 70. East southeast wind around 5 mph becoming calm in the evening.
Tuesday
A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 91. Calm wind becoming east around 5 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 71. East wind around 5 mph becoming calm in the evening.
Wednesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 92. East northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 70.
Thursday
Sunny, with a high near 90.
Thursday Night
Mostly clear, with a low around 67.
Friday
Sunny, with a high near 89.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
San Marcos TX
 29.88°N 97.94°W (Elev. 577 ft)
6:44 am CDT Oct 4, 2025
9am CDT Oct 4, 2025-6pm CDT Oct 10, 2025
 
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