Is the San Marcos River flooding?
The San Marcos River is tracked by 3 USGS streamgauges in Texas. This page compares each gauge’s live water level against its official National Weather Service flood stage, refreshed every 15 minutes, so you can tell whether the San Marcos River is running normal, rising toward flood stage, or already flooding. Right now, every gauge on the San Marcos River is below flood stage. Gauges without a published flood stage show water level and flow only. For nearby rivers, see all Texas river levels.
| Gauge | Status | Stage | Flood stage | Updated |
|---|---|---|---|---|
| San Marcos River at Luling, TX | No flooding | 4.06 ft | 20 ft | |
| San Marcos River at San Marcos, TX | No flood stage defined | 4.04 ft | — | |
| San Marcos River near Martindale, TX | No flood stage defined | 7.53 ft | — |
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.