By Dam Guy, Parasite Creek on Wednesday, July 23, 2003 - 11:00 pm:
It's all about the wind. A breeze out of the north or northwest will blow all the surface water into shore and swimming will be dandy. A day later, with an offshore breeze... the lake will turn over and you'll freeze your Old Testaments. This is just my theory, however, and is unsupported by the meteorological community. Beware the beach flies, and don't tell the tourists that Lake Superior can actually be pleasant this time of year.