National Weather Service United States Department of Commerce

Low temperatures are expected to dip to near or even below freezing late tonight into Monday morning, resulting in areas of frost developing over north-central Wisconsin. A Frost Advisory is in effect from midnight to 8 AM Monday for counties highlighted in blue.
Gusty south winds and high waves will create hazardous marine conditions Monday afternoon through Tuesday morning, with an increased risk of rip currents Monday afternoon through Tuesday afternoon.