Stony Brook Reservoir, Unnamed Trib 1, near Weston, Massachusetts water temperature
Stony Brook Reservoir, Unnamed Trib 1, near Weston, Massachusetts · River
The current water temperature at Stony Brook Reservoir is 12.4 °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 443 data points since July 22, 2026.
Lowest recorded value: 12.4 °C on September 20, 2026 · highest value: 21.4 °C on August 3, 2026.
In September, temperatures have ranged between 12.4 °C and 18.3 °C.
The current value is 3.3 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at Stony Brook Reservoir right now?
The current water temperature is 12.4 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Stony Brook Reservoir?
Currently 12.4 °C (updated continuously).
How warm is at Stony Brook Reservoir in September?
In September, the water temperature recently averaged 15.7 °C.
When is the water warmest at Stony Brook Reservoir?
Across the measurement record, August is on average the warmest month (17.8 °C).
