Well, when you think about it - there are DOZENS of cruise ships, and they sail full of passengers all throughout September. If the chance of a hurricane was worth worrying about, you'd see the cruise lines stop cruising in those areas at that time - but obviously the demand is there. I've cruised the Carib in Sept at least twice, and will again this Sept. I've also cruised in other "hurricane season" months - which, by the way runs for 6 months from June through November. In the unlikely event a hurricane will be affecting a port you're scheduled to visit, the ship will divert to a different area - they know this days in advance & can change accordingly.