Superior Electric Beach/Outdoors Report. Here are the current conditions for the Lake Michigan shoreline and Mason County (including Pentwater) as of 11 a.m. today. Lake Michigan water temperatures: Ludington Stearns Park: 37 F Ludington State Park (Big Sable Point): 37 F Summit Park: 40 F Pentwater: 34 F Afternoon air temperatures: Ludington and Pentwater: Mostly cloudy with temperatures reaching 75 degrees…