Wetsuit diving in WI

[MikeS]

I would say that on Lake Michigan charters, in general, I see as many wer suit divers (if not more) than dry suit divers.  It is also true that for much of the summer, if you stay above the first thermocline,  that you can dive in even 3mm suits.  But, for most people to be comfy for multiple dives per day and for a longer dive season here in the great white north, dry is probably the way to go.