St. Clair River, Port Lambton (ECCC) · River
The current water temperature at St. Clair River is 22.0 °C (as of September 5, 2026, source: GLOS).
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.
Can you swim at St. Clair River right now?
The current water temperature is 22.0 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at St. Clair River?
Currently 22.0 °C (updated continuously).