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. today. Lake Michigan water temperatures: Ludington Stearns Park: 58 F Ludington State Park (Big Sable Point): 64 F Summit Park: 65 Pentwater: 60 F Afternoon air temperatures: Ludington: Sunny with temperatures reaching 75 degrees F; humidity: 53%; wind:…