Arriving week of july 15. Purchase now or will be available then?

Buy them now. July in BH is very busy

Every time we have bought our tickets ahead of time, it makes sure you have a spot on the boat and you don't have to worry about them filling up in the busy season. Have a fun time!

I would suggest purchasing now. There are a variety of cruise selections, and some may be more popular than the other, so you may not want to chance it.