Hi Kaydekng, I have not done any snorkeling on St. Kitts when we were there. We did some in Aruba at Palm Island but it was just fair and we did not feel up to what it was talked up. We, as have many, did St Johns and found this to be some of the best and really enjoyed everything about it. Very calm waters and easy to do there. We went to a sunken ship in Curacao but we found the waters to be very strong and challenging, although there were plenty of beautiful fish to see. I think both Aruba and Curacao have moderate seas for snorkeling. Also, in St Thomas we did take a pirate ship and did two stops..We found the sail very enjoyable and the crew did a very nice job of guiding us to an island that had beautiful sea turtles and another spot with lots of fish. The waters were calmer there. I'm sure you will get lots more input on this question.