Lake Simcoe water temperature

Lake Simcoe · Lake

The current water temperature at Lake Simcoe is 21.2 °C (as of September 7, 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.

21.2 °C

Measured: September 7, 2026 · continuously updated

💧 Water 21.2° · ☀️ Air 17.9° · high today 22.9°

Temperature trend of recent weeks

Nearby waters

Lake Ontario, NW Lake Ontario Ajax · 86.9 km away20.7 °C Lake Ontario, Bluffer's Beach Park · 87.9 km away20.0 °C Lake Ontario, Kew Balmy Beach · 92.7 km away17.0 °C Lake Ontario, Woodbine Beaches · 93.4 km away17.0 °C Lake Ontario, Cherry Beach · 96.0 km away21.0 °C

Frequently asked questions

Can you swim at Lake Simcoe right now?
The current water temperature is 21.2 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Lake Simcoe?
Currently 21.2 °C (updated continuously).

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