San Marcos River near Martindale, TX

Caldwell County, Texas · USGS gauge 08171400 · NWS SMRT2 · San Marcos River flood status · Texas river levels

Is San Marcos River near Martindale, TX flooding right now?

San Marcos River near Martindale, TX measured 7.42 ft on 2026-11-11 20:45:00 UTC. No NWS minor flood stage is published for this gauge.

Gauge height

7.42 ft

as of 21 min ago

Streamflow

102 cfs

data refreshed 5 min ago

The highest crest on record was 40.68 ft on Thu, Oct 31, 2013.

Streamflow outlook

NOAA National Water Model forecast, issued 15 hours ago. The NWM models discharge for every river reach in the country, including the many gauges the National Weather Service does not forecast individually. It is a model, not an official NWS river forecast, and it predicts flow rather than water level.

No National Weather Service flood stage is published for this gauge, so no flood category can be shown — why some gauges have no flood stage.

Highest crests on record

Stage	Date
40.68 ft	2013-10-31
36.18 ft	2015-10-30
26.23 ft	2015-05-24
24.71 ft	2021-10-14
24.32 ft	2019-05-09

Last 7 days

Past 7 days · 7.41–7.62 ft

Nearby gauges

Gauge	Distance	County
Blanco River at San Marcos, TX	5.2 mi	Hays County
San Marcos River at San Marcos, TX	6.7 mi	Hays County
Blanco River near Kyle, TX	10.9 mi	Hays County
Plum Creek at Lockhart, TX	11.6 mi	Caldwell County
Blanco River at Halifax Rch near Kyle, TX	13.7 mi	Hays County

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.

Sources: USGS monitoring location · NWS gauge & forecast