Lake Superior water temperature
Lake Superior, Slate Island · Lake
The current water temperature at Lake Superior is 16.2 °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.
16.2 °C
More measuring points: Lake Superior
Frequently asked questions
Can you swim at Lake Superior right now?
The current water temperature is 16.2 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Lake Superior?
Currently 16.2 °C (updated continuously).
