Diving & Snorkeling Tours in Thailand
101 tours across 18 destinations
Thailand is where many divers get certified. Koh Tao issues more PADI Open Water certifications than anywhere else on earth: calm bays, cheap accommodation, and dive schools that have been running multi-day courses since the 1980s. Open Water courses run 3-4 days for around $350-450 all-in. For certified divers, the Similan Islands (November-April only) rival anywhere in Southeast Asia for visibility and big pelagics. Phuket and Koh Lanta both launch day trips to Phi Phi, Koh Haa, and Hin Daeng. Sail Rock off Koh Phangan is the Gulf of Thailand's signature pinnacle dive.
101 tours
Showing 25 to 48
Krabi 4-Island Sunset Cruise: Snorkeling and Night Swim
Full-Day Phi Phi Islands Tour with Lunch from Krabi
Phi Phi Early Bird and 4 Islands Tour From Krabi
Semi-Private Yacht Tour to Ang Thong Park, Koh Samui
Krabi to James Bond and Hong Islands Offbeat Speedboat Tour
Railay & 4 Island Sunset Cruise with Night Snorkel
Phuket Private Instagram Tour: All-Inclusive
Phi Phi and Khai Islands Snorkeling Trip With Lunch and Fins
Scuba Diving Day Trip at Koh Chang – 2 Dives
Krabi 4 Islands Sunset & Plankton Speedboat Tour
Koh Tao Snorkel Tour of the Bays Aboard the Oxygen
One day road trip around Koh Phangan (Private group)
Koh Tao and Koh Nang Yuan VIP Small Group Tour
Koh Samui 2-Dive Trip to Sail Rock for certified divers
Phi Phi and Bamboo Islands Snorkeling Tour With Fins
Fun Diving Packages (Certified Divers)
Koh Tao 2-Dive Day Trip from Koh Samui for certified divers
Phi Phi Islands Speedboat Tour Adventure from Krabi
Private Speedboat Charter to Ang Thong Marine Park, Samui
PADI Discover Scuba Diving at Sail Rock, Koh Phangan
PADI Open Water Diver Course in Koh Phangan, 3 Days
Private Phuket Boat Tour: Dolphin Spotting & Snorkelling
Phuket 3-Dive Trip: King Cruiser Wreck & Koh Dok Mai
Phi Phi and Khai Islands Snorkeling Tour With Lunch
Diving & Snorkeling in Thailand: FAQ
Do I need a diving certification?
For "Discover Scuba" intro dives, no: any healthy adult can do a supervised single dive in shallow water after a briefing. For deeper or multi-dive days, you need at least Open Water certification. Show your C-card (physical or digital) at check-in.
How long does a PADI Open Water course take?
Three to four days, usually $350-450 including manual, rental gear, and 4 training dives. Koh Tao and Koh Lanta have the most competitive pricing. The course covers theory (quiz and exam), confined-water skills (swimming pool), and open-water dives.
When are the Similan Islands open?
Mid-November to mid-April. The Similans close every monsoon season to protect marine life. Outside these dates, Richelieu Rock and Koh Bon are also closed. For April-October diving, head to Koh Tao or the Gulf.
Are liveaboards worth it over day trips?
For experienced divers who want remote sites (Similan 9, Koh Bon, Richelieu), yes: liveaboards visit 3-4 dive sites per day and unlock the outer islands. For beginners or casual divers, 1-2 day trips from Khao Lak or Phuket are plenty.