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San Antonio River Water Level

Live gauge height for San Antonio River, measured at USGS station San Antonio Rv nr Floresville, TX (4.4 mi from the nearest mapped ramp).

Current gauge height
4.02 ft
Updated 56 min ago
vs. 30-day average
-0.53 ft
30-day avg: 4.55 ft
Streamflow
175 cfs

30-Day Water Level Trend

2026-08-03Range: 3.6912.29 ft2026-09-01

San Antonio River is currently 0.5 ft below its 30-day average — shallow ramps may have less water at the end of the concrete; trim up early and check local reports before launching.

Boat Ramps on San Antonio River (11)

See all San Antonio River boat ramps →

San Antonio River Water Level FAQ

What is the water level of San Antonio River today?

The USGS gauge for San Antonio River (San Antonio Rv nr Floresville, TX) currently reads a gauge height of 4.02 feet, 0.5 ft below its 30-day average. Readings update throughout the day from USGS instrumentation.

Is San Antonio River high or low right now?

Compared with the past 30 days, San Antonio River is 0.5 ft below its 30-day average.

Where can I launch a boat on San Antonio River?

BoatLaunchMap lists 11 boat ramps on San Antonio River, each with directions, ratings, and launch details.

Data: U.S. Geological Survey, station 08183200. Gauge height is measured relative to the station datum, not lake depth. Always verify conditions on site before launching.