Best Dive Sites
Similan Islands (Andaman): Asia’s finest. 30m+ visibility, whale sharks and mantas in season. November–May only (park closes June–October).
Richelieu Rock: World’s top whale shark and manta encounter. Liveaboard only.
Hin Daeng & Hin Muang (near Koh Lanta): Deep pinnacles, regular mantas and whale sharks. Day trip from Koh Lanta.
Koh Tao (Gulf): World’s cheapest PADI certification. Sail Rock has extraordinary fish life.
Chumphon Pinnacle: Whale sharks regularly sighted year-round.
PADI Certification in Thailand
Open Water at Koh Tao: ฿9,000–12,000 — cheapest in the world. 3–4 days.
Similan Islands liveaboards and Koh Tao snorkeling tours are bookable on Klook.