Lake St. Clair water temperature
Lake St. Clair, Lake St Clair · Lake
The current water temperature at Lake St. Clair is 19.6 °C (as of September 20, 2026, source: NOAA NDBC).
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 946 data points since July 22, 2026.
Lowest recorded value: 19.6 °C on September 20, 2026 · highest value: 26.9 °C on August 6, 2026.
In September, temperatures have ranged between 19.6 °C and 23.4 °C.
The current value is 2.4 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at Lake St. Clair right now?
The current water temperature is 19.6 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Lake St. Clair?
Currently 19.6 °C (updated continuously).
How warm is at Lake St. Clair in September?
In September, the water temperature recently averaged 22.0 °C.
When is the water warmest at Lake St. Clair?
Across the measurement record, July is on average the warmest month (23.5 °C).
