NimbocastSan Marcos, TX Weather
Live radar, hourly and 7-day forecast, and National Weather Service alerts for San Marcos, Hays County, Texas.
Updated Jul 29, 2026, 2:18 PM local time · Radar refreshes every 5 minutes
🌤️
San Marcos
94°F
Wind 8 mph
Humidity 50%
Cloud cover 26%
UV index 9
Alerts 0
Active alerts
✓
No active National Weather Service alerts for San Marcos, TX.
San Marcos weather radar
Light
Heavy
Next 24 hours
Now
🌤️
93°F
3 PM
🌤️
95°F
4 PM
☀️
96°F
5 PM
☀️
97°F
6 PM
☀️
98°F
7 PM
☀️
96°F
8 PM
☀️
93°F
9 PM
☀️
89°F
10 PM
☀️
86°F
11 PM
☀️
83°F
12 AM
☀️
81°F
1 AM
☁️
80°F
2 AM
🌤️
79°F
3 AM
☀️
78°F
4 AM
🌤️
77°F
5 AM
⛅
77°F
6 AM
☁️
76°F
7 AM
☁️
77°F
8 AM
☁️
78°F
9 AM
☁️
80°F
10 AM
☁️
83°F
1%
11 AM
☁️
85°F
1%
12 PM
☁️
88°F
1%
1 PM
☀️
92°F
1%
7-day forecast
Today
Jul 29
☁️
98°F
79°F
1%
Thu
Jul 30
☁️
98°F
76°F
2%
Fri
Jul 31
🌤️
103°F
74°F
Sat
Aug 1
☁️
106°F
75°F
8%
Sun
Aug 2
🌦️
101°F
77°F
14%
Mon
Aug 3
🌤️
105°F
77°F
6%
Tue
Aug 4
⛅
104°F
75°F
4%
Weather near San Marcos
8 mi
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Alerts are relayed from the National Weather Service and may lag
the official source. In a life-threatening situation always follow
weather.gov and local emergency
broadcasts.