Lake Superior water temperature

Lake Superior, McQuade Harbor Nearshore, MN · Lake

The current water temperature at Lake Superior is 16.8 °C (as of August 31, 2026, source: NOAA NDBC).

Lakes stratify in summer: bathing-warm on top, markedly colder a few metres down. Measurements are taken at the surface — right where you swim.

16.8 °C

Measured: August 31, 2026 · continuously updated

💧 Water 16.8° · ☀️ Air 27.2°

Temperature trend of recent weeks

Measurement series & statistics

This measurement series includes 1327 data points since July 3, 2026.

Lowest recorded value: 4.0 °C on July 21, 2026 · highest value: 23.6 °C on July 30, 2026.

Nearby waters

Lake Superior, Western Lake Superior · 6.3 km away17.1 °C Lake Superior, Duluth-Offshore Buoy(LLO2) · 8.8 km away18.8 °C Lake Superior, Duluth · 15.5 km away17.8 °C Lake Superior, Wisconsin Point · 18.4 km away19.1 °C St. Louis River at Scanlon, Minnesota · 41.1 km away22.6 °C

More measuring points: Lake Superior

Ontonagon, MI19.9 °C S.W. Pier, St. Marys River19.3 °C Wisconsin Point19.1 °C North Entry Buoy, North Keweenaw Peninsu19.0 °C Duluth-Offshore Buoy(LLO2)18.8 °C North Entry Buoy, North Keweenaw Peninsula18.6 °C

Frequently asked questions

Can you swim at Lake Superior right now?
The current water temperature is 16.8 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Lake Superior?
Currently 16.8 °C (updated continuously).

← All waters