Heavy Rainfall and Flooding Concerns in the Southwest; Coastal Low to Impact the East Coast

Deep tropical moisture will lead to widespread showers and thunderstorms capable of producing flash flooding through early next week over the Southwest and Four Corners. A coastal storm is expected to develop off the southeast U.S. coast tonight and is expected to strengthen and bring flooding, dangerous rip currents, gusty winds and heavy rain up much of the East Coast through early next week. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

76°F

24°C

Humidity 45%
Wind Speed NE 8 mph
Barometer 30.10 in (1018.3 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 10 Oct 9:56 pm CDT
Extended Forecast for

3 Miles WNW San Marcos Municipal Airport TX

  • Tonight

    Tonight: Clear, with a low around 60. Calm wind.

    Low: 60 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 91. Calm wind becoming east northeast around 5 mph in the afternoon.

    High: 91 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 60. East wind around 5 mph becoming calm.

    Low: 60 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 90. Southwest wind 5 to 10 mph becoming south southeast in the afternoon. Winds could gust as high as 20 mph.

    High: 90 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 61. South southeast wind around 5 mph.

    Low: 61 °F

    Mostly Clear

  • Columbus Day

    Columbus Day: Sunny, with a high near 90. Calm wind becoming southeast around 5 mph in the morning.

    High: 90 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 62. Southeast wind around 5 mph becoming calm  in the evening.

    Low: 62 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 91. Calm wind becoming east southeast around 5 mph in the afternoon.

    High: 91 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 62. East wind around 5 mph becoming calm  in the evening.

    Low: 62 °F

    Clear

Detailed Forecast

Tonight
Clear, with a low around 60. Calm wind.
Saturday
Sunny, with a high near 91. Calm wind becoming east northeast around 5 mph in the afternoon.
Saturday Night
Clear, with a low around 60. East wind around 5 mph becoming calm.
Sunday
Sunny, with a high near 90. Southwest wind 5 to 10 mph becoming south southeast in the afternoon. Winds could gust as high as 20 mph.
Sunday Night
Mostly clear, with a low around 61. South southeast wind around 5 mph.
Columbus Day
Sunny, with a high near 90. Calm wind becoming southeast around 5 mph in the morning.
Monday Night
Mostly clear, with a low around 62. Southeast wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 91. Calm wind becoming east southeast around 5 mph in the afternoon.
Tuesday Night
Clear, with a low around 62. East wind around 5 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 92.
Wednesday Night
Clear, with a low around 62.
Thursday
Sunny, with a high near 92.
Thursday Night
Mostly clear, with a low around 63.
Friday
Sunny, with a high near 91.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW San Marcos Municipal Airport TX
 29.93°N 97.91°W (Elev. 738 ft)
6:44 pm CDT Oct 10, 2025
10pm CDT Oct 10, 2025-6pm CDT Oct 17, 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