Lake Superior water temperature

Lake Superior, Ontonagon, MI · Lake

The current water temperature at Lake Superior is 19.9 °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.

19.9 °C

Measured: August 31, 2026 · continuously updated

💧 Water 19.9° · ☀️ Air 23.5° · high today 28.2°

Temperature trend of recent weeks

Lake Superior — Photo: Tim Kiser (w:User:Malepheasant) · CC BY-SA 2.5 · Wikimedia Commons

Measurement series & statistics

This measurement series includes 1421 data points since July 3, 2026.

Lowest recorded value: 10.6 °C on July 4, 2026 · highest value: 21.2 °C on July 17, 2026.

Nearby waters

Mineral River Ds of Native Creek near Silver City, Michigan · 16.2 km away19.0 °C Lake Gogebic near Bergland, Michigan · 35.1 km away22.3 °C Presque Isle River near Connorville, Michigan · 52.0 km away22.8 °C Sturgeon River near Alston, Michigan · 54.0 km away18.7 °C Pilgrim River at Paradise Rd near Dodgeville, Michigan · 64.4 km away15.2 °C

More measuring points: Lake Superior

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 South Entry Buoy, South Keweenaw Peninsu18.4 °C

Frequently asked questions

Can you swim at Lake Superior right now?
The current water temperature is 19.9 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Lake Superior?
Currently 19.9 °C (updated continuously).

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