Stony Brook water temperature
Stony Brook, Viles Street, near Weston, Massachusetts · River
The current water temperature at Stony Brook is 14.6 °C (as of September 21, 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 423 data points since July 23, 2026.
Lowest recorded value: 14.5 °C on September 7, 2026 · highest value: 24.9 °C on August 8, 2026.
In September, temperatures have ranged between 14.5 °C and 20.5 °C.
The current value is 2.8 °C below the September average of this series.
Nearby waters
More measuring points: Stony Brook
Frequently asked questions
Can you swim at Stony Brook right now?
The current water temperature is 14.6 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Stony Brook?
Currently 14.6 °C (updated continuously).
How warm is at Stony Brook in September?
In September, the water temperature recently averaged 17.4 °C.
When is the water warmest at Stony Brook?
Across the measurement record, August is on average the warmest month (20.1 °C).
