At Island Divers we dive everyday of the year and close only on December 26.   November to April is our dry season and busiest period with visibility ranging from 15 to 30 metres depending on which dive sites you go to. Water temperature remains constant at around 30 degrees and it’s possible to go all of our dives sites (though some days weather conditions may not be suitable but it’s quite rare in the dry season.)   May to October, is our wet season, however, our major attraction, the Phi Phi Marine National Park can be dived all year round. Visibility averages 5 to 15m and as it’s a very healthy reef there is always plenty colourful coral and reef fish to sea. The jutting cliffs of the islands form a natural barrier which means there is always a calm, protected side of the islands to dive. It’s not possible to dive the more remote sights such as Hin Daeng and Koh Ha during this period. It is possible to dive the King Cruiser Wreck for most of the wet season, although as it’s in the open sea there are some days when weather conditions don’t make it possible.