Cambridge Reservoir, Unnamed Trib 1, near Lexington, Massachusetts water temperature
Cambridge Reservoir, Unnamed Trib 1, near Lexington, Massachusetts · River
The current water temperature at Cambridge Reservoir is 16.2 °C (as of September 19, 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 359 data points since July 22, 2026.
Lowest recorded value: 10.6 °C on July 26, 2026 · highest value: 37.6 °C on July 25, 2026.
In September, temperatures have ranged between 12.8 °C and 29.1 °C.
The current value is 3.5 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at Cambridge Reservoir right now?
The current water temperature is 16.2 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Cambridge Reservoir?
Currently 16.2 °C (updated continuously).
How warm is at Cambridge Reservoir in September?
In September, the water temperature recently averaged 19.7 °C.
When is the water warmest at Cambridge Reservoir?
Across the measurement record, August is on average the warmest month (20.2 °C).
