A little help for a CA diver...

[scott v]

First off seems like you guys have a really cool site.  I live in California and have been diving for about eight years with a rescue certification.  I do a lot of local diving in So Cal and my wife and I usually do two major trips a year.  My wife is pregnant so that killed our dive trip to Indonesia so instead we are going to be visiting family in Sheboygan in July.  Which leads to my questions about diving in the area.

I am looking to do a day or two of diving within a two hour driving range of Sheboygan.  I would like to do some wreck diving or anything else that would be interesting.  Can someone give me some dive sites to consider and also dive shops/operators for the area. 

Second question is about water temp.  In Winter our waters hit the low fifties and I am OK with a 7mm suit.  What type of water temps would I be looking at in Lake Michigan in the month of July.  Thanks for any info you guys can provide. 

Scott