Lake Champlain water temperature
Lake Champlain, Port Henry, New York · Lake
The current water temperature at Lake Champlain is 14.7 °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 424 data points since July 23, 2026.
Lowest recorded value: 14.6 °C on July 30, 2026 · highest value: 24.9 °C on August 8, 2026.
In September, temperatures have ranged between 14.7 °C and 23.1 °C.
The current value is 5.4 °C below the September average of this series.
Nearby waters
More measuring points: Lake Champlain
Frequently asked questions
Can you swim at Lake Champlain 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 Lake Champlain?
Currently 14.7 °C (updated continuously).
How warm is at Lake Champlain in September?
In September, the water temperature recently averaged 20.1 °C.
When is the water warmest at Lake Champlain?
Across the measurement record, August is on average the warmest month (20.8 °C).
