Hi Smash. I live in Rockledge, which shares a border with Cocoa. There are a number of others local to this area here on the board.
I used a 1mm suit today only to avoid the rocks in 83F water, off the beach in Ft Pierce. (About 70 miles south of Cocoa)
Used a 5mm suit in 72F on Sat, diving Blue Springs About an 1 1/2 hours N.W. of Cocoa (But then it's ALWAYS 72F at Blue Springs.)
I think I found a 69F location this winter offshore, but that was only once.
There are a number of great shops locally, although I can't think of any in Cocoa city limits. The nearest ones would be Seadragons in Rockledge or American Divers in Merritt Island. Both are probably 10 minutes from anywhere in Cocoa.
We've been talking about shore dives in the area recently. You might want to see thread:
http://www.scubaboard.com/showthread.php?t=104069
And a huge selection of springs around the state.
Visibility anywhere local is fairly poor, but if your willing to drive 2 hours North, South or West, you can find just about anything you could want. And it only gets better, the farther you're willing to drive.
Welcome to East Central Florida...
Welcome to Hurricane Season.