Richelieu River (Lake Champlain) water temperature
Richelieu River (Lake Champlain), Rouses Point, New York · Lake
The current water temperature at Richelieu River (Lake Champlain) is 16.1 °C (as of September 21, 2026, source: USGS).
Lakes stratify in summer: bathing-warm on top, markedly colder a few metres down. Measurements are taken at the surface — right where you swim.
Measurement series & statistics
This measurement series includes 439 data points since July 23, 2026.
Lowest recorded value: 16.1 °C on September 21, 2026 · highest value: 25.3 °C on August 8, 2026.
In September, temperatures have ranged between 16.1 °C and 23.7 °C.
The current value is 4.8 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at Richelieu River (Lake Champlain) right now?
The current water temperature is 16.1 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Richelieu River (Lake Champlain)?
Currently 16.1 °C (updated continuously).
How warm is at Richelieu River (Lake Champlain) in September?
In September, the water temperature recently averaged 20.9 °C.
When is the water warmest at Richelieu River (Lake Champlain)?
Across the measurement record, August is on average the warmest month (23.3 °C).
