Stony Brook, Unnamed Tributary 1, near Waltham, Massachusetts water temperature
Stony Brook, Unnamed Tributary 1, near Waltham, Massachusetts · River
The current water temperature at Stony Brook is 14.7 °C (as of August 31, 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.
14.7 °C
Measurement series & statistics
This measurement series includes 447 data points since July 3, 2026.
Lowest recorded value: 13.6 °C on July 6, 2026 · highest value: 29.7 °C on July 29, 2026.
Nearby waters
Stony Brook at RT 20 at Waltham, Massachusetts 23.3 °CStony Brook Unnamed Trib 2 near Weston Station 21.2 °CStony Brook Reservoir, Unnamed Trib 1, near Weston, Massachusetts 16.8 °CStony Brook at Viles Street, near Weston, Massachusetts 19.4 °CHobbs Bk below Cambridge Reservoir near Kendall Green, Massachusetts 24.0 °C
Frequently asked questions
Can you swim at Stony Brook right now?
The current water temperature is 14.7 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Stony Brook?
Currently 14.7 °C (updated continuously).
