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you may want to consider a dry suit, recommended in previous post, you say you only dive summer for now, but if you advance at all in season, depth, or skill you will be wishing you had gone dry, we have similar conditions in Tahoe (40degrees at 160' last week) you may want to consider putting the money into a more "all around" peice of equipment, and keeping more options open for yourself later
Yep.
Something else I didn't mention was that wetsuits are made with rubber that contains millions of gas bubbles for insulation. As you descend, the bubbles compress, giving poorer insulation.
A 7 mm wetsuit could easily be 3mm at 99'. and in addition to getting thinner, it loses it's insulating capacity because the insulation comes from the (now squished) bubbles, not the rubber.
This means that even if you're OK at shallow depths in your wetsuit, you'll be freezing your *** off if you go down to look anything deeper.
Terry