Diving & Snorkeling in Thailand
55 tours across 12 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.
55 diving & snorkeling to explore
Full day snorkeling adventure around Koh Tao
Open Water Course - Become certified diver in 3 days
Open Water Course
Private Tour to Hong Islands & 4 Islands with Sunset & Night Snorkel
La Bombona Diving Koh Tao Open Water Course
Private Phi Phi & 4 Islands Sunset Cruise by Speedboat - from Krabi
Phi Phi Private Tour from Krabi
Become certified diver in 3 days - PADI Open Water Diver course on Koh Tao
Koh Tao VIP Snorkelling Tour
Discover Scuba diving, try diving for beginners (starts from Koh Chang)
From Phi Phi: Half Day Discover Scuba (2 Dives)
Koh Tao 2-Dive Day Trip from Koh Samui for certified divers
Full Day Treasure Hunt on Koh Tao
4 Islands Sunset Private Tour
From Phi Phi: Half Day Trip for Certified Divers (2 Dives)
Krabi 4 Island Morning Cruise with Snorkeling & Gourmet Breakfast
Padi Advanced open Water Diver Courses (Start at Koh Chang)
Krabi 4 Island Sunset Snorkeling Cruise + Bioluminescent Swim
Full-Day Phi Phi Islands Tour with Lunch from Krabi
Phi Phi Early Bird & 4 Islands - Day Tour by Speedboat From Krabi
Krabi to James Bond and Hong Islands Offbeat Speedboat Tour
Railay and 4-Island Sunset Speedboat Cruise with Night Snorkel
4 Islands Sunset + Plankton, Semi-Private 12 Guests, Speedboat
Scuba Diving Day Trip at Koh Chang – 2 Dives
Phi Phi Tour from Krabi , Semi-Private only 12 Guests, Full Day
One day road trip around Koh Phangan (Private group)
Koh Tao and Koh Nang Yuan VIP Small Group Tour
Premium Snorkel Tour to the Bays of Koh Tao onboard the Oxygen
Fun Diving Packages (Certified Divers)
Koh Samui 2-Dive Trip to Sail Rock for certified divers
Phi Phi Islands Speedboat Tour Adventure from Krabi
Samui Boat Charter, Private Speedboat Charter, Angthong National Marine Park
Snorkel Tour to Koh Nangyuan and the hidden bays of Koh Tao onboard the Oxygen
Snorkelling Trip 5 Island Tour Around Koh Tao and Koh Nang yuan
Krabi: 4 Island Luxury Yacht with Snorkelling & Clear Kayaking
Pattaya Full-Day SUNSET Yacht exclusive Island(Buffet,Snorkeling)
From Khao Lak : Phi Phi Islands Adventure Day Trip with Lunch
Koh Tao Snorkeling Tour to Hidden Bays and Koh Nang Yuan
Krabi 4 Island Tour: Private Long-tail Boat Charter
Snorkeling Adventure at Koh Chang – Departing from Koh Chang
Early Bird Phi Phi Island & 4 Islands Speed Boat Tour from Krabi
Local Reef Snorkelling and Deserted Beach
Highlights of Phi Phi Islands
Sunset Dinner Cruise with night Swimming by Luxury Junk Boat
Phi Phi One Day Tour by Speed Boat from Ao Nang, Krabi
Koh Tao: SunSet Magic Snorkeling Day Trip Tao & Nangyuan w/ Meals
Koh Tao & Koh Nang Yuan Snorkeling Tour by Speed Boat from Samui
Road trip around Koh Phangan-Join Trip (Shared road trip)
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.