National Weather Service United States Department of Commerce

A moderate swim risk lingers at some Lake Huron beaches through the rest of the day, and at some Lake Michigan beaches Monday. It looks a lot warmer for your Memorial Day, though water temperatures will remain very chilly. Regardless of swim risk, hypothermia is possible due to these cold water temperatures.
Lingering moisture tonight will lead to some patchy fog across the region, with lows in the 40s. Skies trend partly to mostly sunny Monday as temperatures rise into the upper 70s to even low 80s in a few spots away from the shores, but isolated showers and storms are possible, especially near Saginaw Bay along the lake breeze in the afternoon. Tuesday looks quite toasty, with highs looking to reach well into the 80s away from the coast, though a rogue shower or rumble of thunder cannot be ruled out. Signals currently point toward a slight cooling trend beyond this for the latter half of the week.