Connecticut River at Thompsonville, Connecticut water temperature
Connecticut River at Thompsonville, Connecticut · River
The current water temperature at Connecticut River at Thompsonville is 21.2 °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 112 data points since August 26, 2026.
Lowest recorded value: 21.2 °C on September 20, 2026 · highest value: 26.4 °C on August 28, 2026.
In September, temperatures have ranged between 21.2 °C and 25.0 °C.
The current value is 2.1 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at Connecticut River at Thompsonville right now?
The current water temperature is 21.2 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Connecticut River at Thompsonville?
Currently 21.2 °C (updated continuously).
How warm is at Connecticut River at Thompsonville in September?
In September, the water temperature recently averaged 23.3 °C.
