Superior Electric Beach/Outdoors Report. Here are the current conditions for the Lake Michigan shoreline and Mason County (including Pentwater) as of 1:30 p.m. today. Lake Michigan water temperatures: Ludington Stearns Park: 57 F Ludington State Park (Big Sable Point): 57 F Summit Park: 61 F Pentwater: 64 F Afternoon air temperatures: Ludington and Pentwater: Cloudy at 72 degrees F, decreasing to…