The warmest water temperature of the Great Lakes today is 81.1 degrees in Lake Erie and the coldest is at 65.1 degrees in Lake Michigan.

Swimming is most comfortable in lake waters at about 70 degrees, according to Swimoutlet.com. While scattered thunderstorms ...

"Although small fishing villages and ports dot the map of Lake Huron ... lake temperatures average in the low 30s. This Great Lake doesn't border Michigan. Where to find Lake Ontario Is Lake Erie very ...

Lake Ontario is the only lake seeing a higher water level — by 6 inches — this month than 2024. Compared to May 2025, the Great Lakes' water levels have slightly increased.

The lake, which Michigan shares with Ontario, Canada, has 3,800 miles of shoreline and the world's largest freshwater island, Manitoulin Island, the National Museum of the Great Lakes notes.