Koh Lanta has increasingly become a popular base for divers who want to discover the best of Andaman’s underwater. Most sites are part of marine park and are at close proximity. Hin Daeng and Hin Muang are world-class. Other popular sites include Koh Yung, Koh Phi Phi, Koh Bida, Koh Haa, Shark Point, Anemone Reef, King Cruiser Wreck. Some of the sites are also great for snorkeling. Rich marine diversity, warm water and great visibility is at its best from December to April .

There are several operators offering scuba lessons and diving trips. Free use of snorkeling set and inflamable boat are available in the villas.