On Monday, Aug. 25, the shores of lakes Michigan, Huron and Superior are dangerous for swimmers and boaters. See the forecast.

Dangerous swimming conditions are expected in Lakes Michigan, Huron, and Superior due to large waves and strong currents. A high swim risk is in effect for Lake Superior beaches in Marquette and ...

For July 5, the NWS said kayakers on Lake Superior should use caution with waves 1.5 to 2 feet. Sunday, waves could be up to 4 feet and the threat increases to "limited" for boaters.

The National Weather Service (NWS) said the waters of Chequamegon Bay on Lake Superior at Ashland, Wis., dropped by roughly four feet on Saturday, June 21, 2025 during a post-thunderstorm seiche.

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