Warning: Javascript must be enabled to use all the features on this page!


Page Loading - Please Wait...

Click to hideNews Bulletins
! This page is undergoing modernization with expected decommissioning as key features are added to the modernized pages.
Learn more about our modernization plans to find out which options will suit you best. Next Generation Monitoring Location Page is available now.
A beta version of the My Favorites page is available in WDFN. Try it out and tell us what you think at wdfn@usgs.gov

USGS 08171400 San Marcos Rv nr Martindale, TX

PROVISIONAL DATA SUBJECT TO REVISION

Click to hidestation-specific text
Funding for this site is provided by the cooperators / programs below:
Click to go to the Guadalupe-Blanco River Authority web page

Guadalupe-Blanco River Authority
Rainfall Disclaimer

retransmission, forecasts and summary of this location by the National Weather Service
Retransmission, forecasts and summary by the National Weather Service
This station managed by the San Antonio Field Unit.

Available Parameters Available Period
  
2011-05-19  2026-10-13
2011-05-19  2026-10-13
2024-07-11  2026-10-13







 (7)
 
  -- or --

 

 
Summary of all available data for this site
Instantaneous-data availability statement

Discharge, cubic feet per second
Most recent instantaneous value: 107 10-13-2026   10:45 CDT
Graph of

Add up to 2 more sites and replot for "Discharge, cubic feet per second"

?
 
Note



Create presentation-quality / stand-alone graph.   Subscribe to
?
WaterAlert      

See this graph on the Monitoring Location Pages

Share this graph |

Daily discharge, cubic feet per second -- statistics for Oct 13 based on 15 water years of record more
Min
(2023)		 Most Recent
Instantaneous
Value Oct 13		 25th
percen-
tile		 Median Mean 75th
percen-
tile		 Max
(2017)
56.4 107 111 157 169 233 365

Gage height, feet
Most recent instantaneous value: 7.45 10-13-2026   10:45 CDT
Graph of

Add up to 2 more sites and replot for "Gage height, feet"

?
 
Note



Create presentation-quality / stand-alone graph.   Subscribe to
?
WaterAlert      

See this graph on the Monitoring Location Pages

Share this graph |


Precipitation, cumulative, inches
 
-- Data temporarily unavailable for the time period specified --