Superior Electric Beach/Outdoors Report. Here are the current conditions for the Lake Michigan shoreline and Mason County (including Pentwater) as of 9:50 a.m. Lake Michigan water temperatures: Ludington Stearns Park: 53 F Ludington State Park (Big Sable Point): 52 F Summit Park: 52 F Pentwater: 53 F Afternoon air temperatures: Ludington and Pentwater: Partly cloudy and 68 degrees F…