Lake Simcoe water temperature
Lake Simcoe · Lake
The current water temperature at Lake Simcoe is 19.5 °C (as of September 20, 2026, source: ECCC).
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 32 data points since September 7, 2026.
Lowest recorded value: 19.5 °C on September 20, 2026 · highest value: 23.3 °C on September 8, 2026.
In September, temperatures have ranged between 19.5 °C and 23.3 °C.
The current value is 1.4 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at Lake Simcoe right now?
The current water temperature is 19.5 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Lake Simcoe?
Currently 19.5 °C (updated continuously).
How warm is at Lake Simcoe in September?
In September, the water temperature recently averaged 20.9 °C.
