Cambridge Reservoir, Unnamed Trib 3, near Lexington, Massachusetts water temperature
Cambridge Reservoir, Unnamed Trib 3, near Lexington, Massachusetts · River
The current water temperature at Cambridge Reservoir is 16.5 °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 438 data points since July 22, 2026.
Lowest recorded value: 16.5 °C on September 20, 2026 · highest value: 23.6 °C on July 22, 2026.
In September, temperatures have ranged between 16.5 °C and 19.8 °C.
The current value is 1.9 °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 16.5 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Cambridge Reservoir?
Currently 16.5 °C (updated continuously).
How warm is at Cambridge Reservoir in September?
In September, the water temperature recently averaged 18.4 °C.
When is the water warmest at Cambridge Reservoir?
Across the measurement record, August is on average the warmest month (19.1 °C).
