San Marcos River at San Marcos, TX
Is San Marcos River at San Marcos, TX flooding right now?
San Marcos River at San Marcos, TX measured 3.67 ft on 2026-09-22 21:45:00 UTC. No NWS minor flood stage is published for this gauge.
Gauge height
3.67 ft
Streamflow
91 cfs
The highest crest on record was 21.29 ft on Sat, Oct 17, 1998.
Streamflow outlook
Highest crests on record
| Stage | Date |
|---|---|
| 21.29 ft | 1998-10-17 |
| 10.77 ft | 2002-07-08 |
Last 7 days
Nearby gauges
| Gauge | Distance | County |
|---|---|---|
| Blanco River at San Marcos, TX | 1.5 mi | Hays County |
| Blanco River near Kyle, TX | 6.4 mi | Hays County |
| San Marcos River near Martindale, TX | 6.7 mi | Caldwell County |
| Blanco River at Halifax Rch near Kyle, TX | 8.1 mi | Hays County |
| Blanco River at Wimberley, TX | 11.8 mi | Hays County |
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Provisional data: Real-time readings are provisional and subject to revision by the USGS — sensors can be affected by ice, debris, or equipment malfunction. Do not rely on this site for decisions involving personal safety; follow official guidance from the National Weather Service and local authorities.