Koh Lanta Scuba Diving

Fast Boats & Short Journey Times

Avoid The Crowds: Small Groups, Great Personal Service

Koh Lanta diving trips, snorkel trips, and scuba courses in very small groups with a focus on great personal service, safety and fun.

Departing from the beach each morning at 9am, our fast boats carry a maximum of 10 diving guests, plus our dive staff to some of Koh Lanta's best dive sites.

Enjoy our 5-star service and let some of the most experienced, friendly and professional dive instructors on Koh Lanta take care of you while you just sit back, dive and relax...

Fast Boats & Short Journey Times

Enjoy short journey times on our two speed boats, with an early afternoon return to Koh Lanta and plenty of time to explore the island or relax on the beach.

Our boats are custom designed for scuba diving, with purpose-built tank racks, a western-style toilet, and fresh water shower on board.

Journey times to Koh Haa are just 30 minutes from our dive shop @ Lanta Castaway Beach Resort, and as little as 60 - 70 minutes to Hin Daeng & Hin Muang, depending on sea conditions.

If you have any questions about diving from Koh Lanta, please email us info@diveandrelax.com and we'd be delighted to help you plan a trip to our wonderful island.

Koh Lanta Diving: Thailand's Best Dive Sites

Koh Lanta is a scuba diving paradise, home to some of Thailand's most spectacular islands, healthy coral reefs, and a huge diversity of marine life.

Many of Thailand's best dive sites can be found in the Mu Koh Lanta Marine Park. The Koh Haa Islands, the Koh Rok Islands, and the famous Hin Daeng & Hin Muang are must-sees for all divers visiting Koh Lanta.

Around the Mu Koh Phi Phi Marine Park, divers can also explore the The Bida Islands and the submerged pinnacle of Hin Bida. There are also many other superb dive sites around Koh Phi Phi Leh, including Shark Point & Anemone Reef, and HTMS Kledkaeo Wreck and Hin Klai.

Amazing Marine Life

The dive sites around Koh Lanta are home to countless beautiful, weird, and wonderful marine creatures.

Our tropical Koh Lanta Marine Life Guide has photos and descriptions of hundreds of species of fish, corals, and other amazing creatures we've spotted at our dive sites.

After returning from a trip, our dive staff love to spend time with our guests, logging the dives and sharing our knowledge of the wonderful marine life at the dive sites around Koh Lanta.

Underwater Photographers love Koh Lanta

Koh Lanta diving is easy and relaxed. With relatively shallow reefs, sheltered lagoons and gentle drop-offs, most of our reef life is in the 5m to 20m depth range.

Divers love the great visibility, dramatic underwater topography, and huge diversity of corals, fish, crustaceans, slugs, snails, sponges and thousands of other marine species found around Koh Lanta.

Shallower diving means you get to spend more time underwater, where the colours are more vibrant, and the marine life around Koh Lanta is most abundant.

Get certified with Dive & Relax

Learn to scuba dive on Koh Lanta with the Open Water Diver course, conducted over four days. Enjoy small groups and great personal attention with our professional and experienced scuba instructors.

After you're certified, you can continue diving with the Advanced Open Water Diver course here on Koh Lanta. Gain experience, dive deeper, navigate dive sites, perfect your underwater skills, and prepare yourself for exciting dive adventures around the world.

Try Scuba Diving on Koh Lanta

If you've ever thought about trying scuba diving, try Discover Scuba Diving on Lanta, it's a perfect introduction to the wonderful underwater world.

Join our half day, 2-dive Discover Scuba Diving trip. You'll spend the day with an instructor and learn some simple scuba diving skills, diving to a max depth of 12 m on some of Thailand?s best dive sites.

If you love your first diving experience, you can then get certified with the Open Water Diver Course on Koh Lanta in just 4 days.

Snorkel Trips

For non-divers, we offer snorkel trips from Koh Lanta in small groups to the same superb locations only normally visited by divers.

All our snorkel guides are professional divers who love to show non divers the wonderful coral reefs and thriving marine life around Koh Lanta.

Once you've had a chance to experience our boats, coral reefs, and wonderful staff, you might just be tempted to try scuba diving here on Lanta. Or even get your Open Water Diver certification on Koh Lanta.

Discover the island of Koh Lanta...

Even though Koh Lanta has some of Thailand's best dive sites, visitors also love to explore and enjoy the island itself. Despite being one of Thailand's largest islands, Koh Lanta remains relatively unknown, often overlooked by the vast majority of visitors to Thailand.

At approximately 25 km long and 4 km wide, the more laid back island of Koh Lanta has avoided the crowds and mass-market tourism of places like Phuket, Phi Phi, Ao Nang or Koh Tao.

With amazing sunsets, long sandy beaches, fantastic scuba diving and snorkeling, great transport links and easy connections to Krabi town and Krabi Airport, Ao Nang, Koh Jum, Koh Phi Phi, Koh Lipe and the quieter southern islands, we think that Koh Lanta could be the perfect holiday destination.

Private Speedboat Charter

For the perfect dive or snorkel trip, you can also privately charter a speed boat on Koh Lanta to some of the most beautiful islands, beaches, and coral reefs around Koh Lanta.

The ultimate way to avoid the crowds; design your own custom trip, decide your activities, choose the destination, and let our fantastic staff take care of you on a truly memorable day out for you and your family.

Beach Paradise

You can find our dive shop @ Lanta Castaway Beach Resort, located at the southern end of Long Beach. The well-appointed bungalows, friendly beach bar and open-air restaurant are perfect for divers to enjoy Lanta's relaxed atmosphere, scenery, beaches, and sunsets.

Most dive boats depart from the piers in Saladan, at the north of the island. This extra travelling distance can add quite a bit of journey time to many of the dive sites.

Unlike other dive operators, our speed boats depart from the beach at Lanta Castaway Beach Resort each morning, ensuring the shortest possible trip to the dive sites. Enjoy beach departures and an early afternoon return to Koh Lanta, so you can explore the island or relax on the beach after a perfect day diving.

Best Time to Visit Koh Lanta

The Koh Lanta diving season is determined by the weather and wind direction, with the easterly prevailing winds from October to May (the trade winds), and the westerly monsoon winds from June to early October.

Scuba diving and snorkeling around Koh Phi Phi is possible all year round, however most divers like to visit during the high season months of October to May when the wind direction usually brings better weather and sea conditions.

Get more information on the best time for diving and snorkeling around Koh Lanta with check out the best time to visit Koh Lanta.

How to Get to Koh Lanta

Even though it's less developed than other islands, Koh Lanta is very well connected to the rest of south west Thailand by many daily ferries, speed boats and minivan services, making it really easy for divers to get to the island.

As one of the main travel hubs in the area, Koh Lanta is a great base not only for divers, but also to explore the dozens of islands and beaches on the southern Andaman coast of Thailand.

Find out more on how to get to Koh Lanta from Krabi Town, Krabi Airport, Railay, Ao Nang, Koh Jum, Phi Phi, Phuket, Koh Lipe, Koh Buloan, Koh Kradan, Koh Muk (Mook), Koh Ngai, and Trang.