Lake Superior water temperature
Lake Superior, Western Lake Superior · Lake
The current water temperature at Lake Superior is 12.5 °C (as of October 13, 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.
Water quality
Official EPA rating: excellentMeasurement series & statistics
This measurement series includes 1178 data points since August 17, 2026.
Lowest recorded value: 11.8 °C on October 13, 2026 · highest value: 25.9 °C on August 27, 2026.
In October, temperatures have ranged between 11.8 °C and 19.8 °C.
The current value is 1.0 °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 12.5 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Lake Superior?
Currently 12.5 °C (updated continuously).
How warm is at Lake Superior in October?
In October, the water temperature recently averaged 13.5 °C.
When is the water warmest at Lake Superior?
Across the measurement record, August is on average the warmest month (17.4 °C).
How is the water quality at Lake Superior?
The official classification is: excellent.
