Superior Electric Beach/Outdoors Report. Here are the current conditions for the Lake Michigan shoreline and Mason County (including Pentwater) as of 2 p.m. today. Lake Michigan water temperatures: Ludington Stearns Park: 54 F Ludington State Park (Big Sable Point): 42 F Summit Park: 48 F Pentwater: 48 F Afternoon air temperatures: Ludington and Pentwater: Cloudy becoming partly cloudy later with temperatures…