Diving Koh Samui in amazing Thailand. Koh Samui is a beautiful diving island in the Gulf of Thailand and offers the most exciting snorkeling and diving in Koh Samui. Nice beaches, crystal clear water and 27-30 C (85 F) in the water. We have many reefs and coral formations and lots of marine life. You can spot reef sharks, blacktip sharks regularly, groupers, turtles. And 3-10 meter whale sharks and many more different life that the sea can offer. Diving in Koh Samui for certified divers and beginners we have daily trips to Gulf of Thailand’s top dive sites. Our dive masters and instructors will guide you in small groups and always put safety first.