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Lake Superior water temperature

Lake Superior, Breakers Beach · Lake

The current water temperature at Lake Superior is 17.1 °C (as of September 20, 2026, source: NOAA NDBC · Proxy).

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

17.1 °C
Measured: September 20, 2026 · continuously updated
💧 Water 17.1° · ☀️ Air 15.7°
Temperature trend of recent weeks

Measurement series & statistics

This measurement series includes 1323 data points since July 22, 2026.

Lowest recorded value: 8.7 °C on September 5, 2026 · highest value: 20.3 °C on September 3, 2026.

In September, temperatures have ranged between 8.7 °C and 20.3 °C.

Nearby waters

Lake Superior, North Entry Buoy, North Keweenaw Peninsu · 1.2 km away17.1 °CLake Superior, North Entry Buoy, North Keweenaw Peninsula · 5.3 km away18.6 °CPilgrim River at Paradise Rd near Dodgeville, Michigan · 17.3 km away11.4 °CLake Superior, South Entry Buoy, South Keweenaw Peninsu · 34.1 km away16.1 °CSlate River at Skanee Road near Skanee, Michigan · 52.5 km away13.2 °C

More measuring points: Lake Superior

Duluth-Offshore Buoy(LLO2)18.8 °CNorth Entry Buoy, North Keweenaw Peninsula18.6 °CS.W. Pier, St. Marys River18.1 °CWhitefish Bay17.7 °CPokegama Bay17.6 °CNorth Entry Buoy, North Keweenaw Peninsu17.1 °C

Frequently asked questions

Can you swim at Lake Superior right now?
The current water temperature is 17.1 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Lake Superior?
Currently 17.1 °C (updated continuously).

How warm is at Lake Superior in September?
In September, the water temperature recently averaged 17.1 °C.

When is the water warmest at Lake Superior?
Across the measurement record, July is on average the warmest month (18.4 °C).

Open in the BrrChecker app

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