A day trip by speed boat to visit the Hong Islands from Railay Beach is a great excursion to see some amazing beaches and go snorkeling. By speed boat it only takes about an hour to reach the Hong Islands, you can go by long-tail boat and I think that takes about 1.5 hours. Our trip included 3 or 4 stops at different islands and beaches along with a provided lunch.

Really nice way to spend a day, weather was fantastic and the beaches amazing.