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 73 to 96
Similan Islands Speedboat Day Tour from Phuket
Full-Day Koh Phi Phi Scuba Diving Course from Phuket
Phi Phi Speedboat Day Trip: Maya Bay, Bamboo & Seaview Lunch
Koh Samui Jet Ski Safari: Pig Island & Virgin Islands
Koh Lanta Snorkel Tour to Koh Rok & Koh Haa
Koh Tao and Koh Nang Yuan Snorkeling Tour From Samui
Amazing Phang Nga Bay Day Trip with Kayaking & Snorkelling
Hong Island Speed Boat Adventure from Krabi
Similan Islands Full Day – Premium
Phi Phi Islands Speedboat Snorkelling Tour from Koh Phi Phi
Phuket 3 Khai Islands Speedboat Tour With Snorkeling
Coral and Racha Islands Luxury Catamaran Experience
Phi Phi Islands Private Speedboat Tour
All-in Phi Phi, Maiton, MayaBay, Khai, Bamboo islands Tour
Surin Islands Snorkelling Day Trip from Khao Lak
Maya Beach, Bamboo Island & Phi Phi Islands Tour From Phuket
Phuket 3 Khai Islands Snorkel Tour, Half or Full Day
Koh Tao & Koh Nang Yuan Snorkeling Tour from Samui
Phi Phi and Khai Islands Snorkeling Tour by Speedboat
Half day Tropical Coral Island Snorkeling Tour from Phuket
Similan Islands Snorkeling Trip From Phuket
James Bond and Khai Island Premium Trip by Seastar Andaman
Phi Phi, Maya Bay, Khai Island and Seaview Lunch Premium Trip
Bamboo Island and Phi Phi Island Full Day Tour From Phuket
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.