Lake Superior water temperature

Lake Superior, South Entry Buoy, South Keweenaw Peninsu · Lake

The current water temperature at Lake Superior is 18.4 °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.

18.4 °C

Measured: August 31, 2026 · continuously updated

💧 Water 18.4° · ☀️ Air 23.9° · high today 27.4°

Temperature trend of recent weeks

Lake Superior — Photo: Paul R. Burley · CC BY-SA 4.0 · Wikimedia Commons

Measurement series & statistics

This measurement series includes 1411 data points since July 3, 2026.

Lowest recorded value: 9.4 °C on July 16, 2026 · highest value: 22.0 °C on July 14, 2026.

Nearby waters

Pilgrim River at Paradise Rd near Dodgeville, Michigan · 17.3 km away15.2 °C Falls River near L'anse, Michigan · 26.3 km away15.8 °C Sturgeon River near Alston, Michigan · 33.7 km away18.7 °C Lake Superior, North Entry Buoy, North Keweenaw Peninsu · 33.7 km away19.0 °C Lake Superior, North Entry Buoy, North Keweenaw Peninsula · 37.0 km away18.6 °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 18.4 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Lake Superior?
Currently 18.4 °C (updated continuously).

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