San Antonio River water temperature
San Antonio River, Elmendorf, Texas · River
The current water temperature at San Antonio River is 29.8 °C (as of September 21, 2026, source: USGS).
A river can change temperature within hours — snowmelt, rain or power-plant operations show up immediately. That is why the measured value counts here, not an estimate.
Measurement series & statistics
This measurement series includes 338 data points since July 23, 2026.
Lowest recorded value: 27.7 °C on August 29, 2026 · highest value: 33.1 °C on August 21, 2026.
In September, temperatures have ranged between 29.6 °C and 32.5 °C.
The current value is 1.1 °C below the September average of this series.
Nearby waters
More measuring points: San Antonio River
Frequently asked questions
Can you swim at San Antonio River right now?
The current water temperature is 29.8 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at San Antonio River?
Currently 29.8 °C (updated continuously).
How warm is at San Antonio River in September?
In September, the water temperature recently averaged 30.9 °C.
When is the water warmest at San Antonio River?
Across the measurement record, August is on average the warmest month (31.0 °C).
