Alameda C below Welch C near Sunol, California water temperature
Alameda C below Welch C near Sunol, California · River
The current water temperature at Alameda C below Welch C near Sunol is 15.9 °C (as of September 20, 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 252 data points since July 22, 2026.
Lowest recorded value: 14.0 °C on September 7, 2026 · highest value: 21.8 °C on August 10, 2026.
In September, temperatures have ranged between 14.0 °C and 20.0 °C.
The current value is 0.8 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at Alameda C below Welch C near Sunol right now?
The current water temperature is 15.9 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Alameda C below Welch C near Sunol?
Currently 15.9 °C (updated continuously).
How warm is at Alameda C below Welch C near Sunol in September?
In September, the water temperature recently averaged 16.7 °C.
When is the water warmest at Alameda C below Welch C near Sunol?
Across the measurement record, August is on average the warmest month (18.6 °C).
