gangrel441:Better than the ocean? Well...the ocean is a big place...I guess that depends on where in the ocean we're talking about...
But the diving is pretty good...and vis is much better than it was when your father-in-law was diving it, assuming he hasn't dove it in the last 10 years or so...
I wouldn't take that bet about it not being colder than your dives, depending on when you go. However, in mid-to-late summer, the water temps reach into the high 60's or low 70's, quite nice in a 7mm suit. I don't dive dry yet, so that's when I go.
Always up for a new buddy. Look forward to hearing from ya'.
Been to Lake Michigan several times, even in the summer when the surface temp is near 80 the temp near 80-110 feet is around 46.