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Great Lakes water temperature
Lake-average surface temperature for all six lakes, updated daily from NOAA GLERL.
51.9 FLake Superior11.1 C · Oct 1760.6 FLake Michigan15.9 C · Oct 1757.5 FLake Huron14.2 C · Oct 1764.5 FLake Erie18.0 C · Oct 1759.5 FLake Ontario15.3 C · Oct 1762.5 FLake St. Clair16.9 C · Oct 17
Source: NOAA GLERL GLSEA. Daily CSV.