National Weather Service

News Headlines

Click Here for our 2026 Severe Weather and Flood Training Schedule

Hazardous Weather Conditions

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

40°F

4°C

Humidity	38%
Wind Speed	N 20 G 31 mph
Barometer	30.33 in (1026.9 mb)
Dewpoint	16°F (-9°C)
Visibility	10.00 mi
Wind Chill	30°F (-1°C)
Last update	16 Mar 7:56 am CDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

2 Miles SSW Lockhart TX

Red Flag Warning March 16, 08:36am until March 16, 08:00pm

Click here for hazard details and duration

Red Flag Warning

Red Flag Warning March 16, 08:36am until March 16, 08:00pm
NOW until 8:00pm Mon
Red Flag Warning
Today
High: 57 °F
Increasing
Clouds
Tonight
Low: 32 °F
Gradual
Clearing
Tuesday
High: 67 °F
Sunny
Tuesday Night
Low: 41 °F
Partly Cloudy
Wednesday
High: 78 °F
Sunny
Wednesday Night
Low: 50 °F
Mostly Clear
Thursday
High: 85 °F
Sunny
Thursday Night
Low: 54 °F
Clear

Detailed Forecast

Today

Increasing clouds, with a high near 57. North wind 15 to 20 mph, with gusts as high as 30 mph.

Tonight

Cloudy during the early evening, then gradual clearing, with a low around 32. North northeast wind 10 to 15 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.

Tuesday

Sunny, with a high near 67. South wind 5 to 15 mph, with gusts as high as 20 mph.

Tuesday Night

Partly cloudy, with a low around 41. South wind 5 to 10 mph, with gusts as high as 20 mph.

Wednesday

Sunny, with a high near 78. South wind 5 to 10 mph, with gusts as high as 20 mph.

Wednesday Night

Mostly clear, with a low around 50. South wind around 5 mph.

Thursday

Sunny, with a high near 85. South southwest wind 5 to 10 mph.

Thursday Night

Clear, with a low around 54. South wind around 5 mph.