
Tourist who is planning to visit Tioman island are advised to travel by air. Ferries or speed boat are not permitted to go out to the sea by the Jetty Authority during the Off-Peak Monsoon periods. If you insist of going by boat, it is at your own risk. There are still some local fisherman who are willing to ferry tourist to Tioman Island at an exorbitant price.
If you would still like to visit a nice island then you may want to look at your options on the West side of Malaysia during that time as the Southwest Monsoon is from late May to September. So you will enjoy the clear skies. Langkawi Island is on the west coast which can be a good option for you.