Superior Electric Beach/Outdoors Report. Here are the current conditions for the Lake Michigan shoreline and Mason County (including Pentwater) as of 10:30 a.m. Lake Michigan water temperatures: Ludington Stearns Park: 49 F Ludington State Park (Big Sable Point): 51 F Summit Park: 43 F Pentwater: 58 F Afternoon air temperatures: Ludington and Pentwater: Mostly cloudy at 74 degrees F increasing to…