Great Slave Lake water temperature
Great Slave Lake, Hay River · Lake
The current water temperature at Great Slave Lake is 14.3 °C (as of September 6, 2026, source: Water Survey of Canada).
Lakes stratify in summer: bathing-warm on top, markedly colder a few metres down. Measurements are taken at the surface — right where you swim.
14.3 °C
Nearby waters
Frequently asked questions
Can you swim at Great Slave Lake right now?
The current water temperature is 14.3 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Great Slave Lake?
Currently 14.3 °C (updated continuously).
