Lake Superior water temperature
Lake Superior, South Entry Buoy, South Keweenaw Peninsu · Lake
The current water temperature at Lake Superior is 12.8 °C (as of October 14, 2026, source: NOAA NDBC).
The station's own sensor has not delivered a reliable value since October 14, 2026 · shown: last reliable measurement.
Lakes stratify in summer: bathing-warm on top, markedly colder a few metres down. Measurements are taken at the surface — right where you swim.
Measurement series & statistics
This measurement series includes 1042 data points since August 17, 2026.
Lowest recorded value: 8.3 °C on October 4, 2026 · highest value: 19.8 °C on September 3, 2026.
In October, temperatures have ranged between 8.3 °C and 16.7 °C.
The current value is 1.4 °C below the October average of this series.
Nearby waters
More measuring points: Lake Superior
Frequently asked questions
Can you swim at Lake Superior right now?
The current water temperature is 12.8 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Lake Superior?
Currently 12.8 °C (updated continuously).
How warm is at Lake Superior in October?
In October, the water temperature recently averaged 14.2 °C.
When is the water warmest at Lake Superior?
Across the measurement record, August is on average the warmest month (18.2 °C).
