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 16.5 °C (as of September 1, 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 225 data points since July 9, 2026.
Lowest recorded value: 15.1 °C on August 30, 2026 · highest value: 21.8 °C on July 22, 2026.
In September, temperatures have ranged between 16.5 °C and 17.7 °C.
The current value is 0.6 °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 16.5 °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 16.5 °C (updated continuously).
How warm is at Alameda C below Welch C near Sunol in September?
In September, the water temperature recently averaged 17.1 °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).
