On the island, well in the 60’s there used to be a race track and if you didn’t make the corner going into the pits you ended up in a canal. There may be some wrecks in there but that was some nasty looking water, I managed to keep my car out of that :)
I think you’ll need to head over to Long Island to 9th Street or out to Oak Beach, just watch the tides, you’ll need to be in at slack high tide or down to the Jersey Shore. That water needs to warm up more before I even think about it.