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The Perfect Dive Trip

Avoid The Crowds | Small Groups | Great Personal Service

Koh Lanta Scuba Diving

Welcome to Dive & Relax

Avoid The Crowds...

Avoid the crowds on larger dive boats: Diving, snorkeling and PADI courses in small groups with a focus on great service, personal attention, safety and fun.

Scuba Diving Koh Lanta with Dive & Relax, Koh Lanta

Leaving later than other dive boats, and arriving at the dive and snorkel sites before them, our speed boats offer maximum flexibility and the best chance of avoiding the high season crowds.

Speed Boats & Small Groups

Travel in style to the dive sites on our fast boats, enjoying short journey times and an early afternoon return to Koh Lanta with plenty of time to explore the island or relax on the beach.

Departing from the beach each morning at 9am, we carry a maximum of 10 divers on each of our speed boats, with typically just 2 or 3 divers (max 4) with each Dive Master, and even smaller groups of students with each instructor.

Dive & Relax Speedboat Koh Lanta

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 the closer dive sites such at Koh Haa can be as little as 25 - 30 minutes from our office at Lanta Castaway Beach Resort, and as little as 55 - 60 minutes to Hin Daeng & Hin Muang, depending on the sea conditions.

Fantastic Personal Service

We are very lucky to have some of the most experienced, friendly and professional dive masters and instructors on Koh Lanta in our small team.

With easy access to some of the best diving and snorkeling in Thailand, we focus on small groups, personal attention and great service.

Whale Shark @ Koh Haa with Dive & Relax, Koh Lanta

If you have any questions, please email us info@diveandrelax.com and we'd be delighted to help you plan a diving trip, snorkeling trip or PADI Scuba Diving course during your stay on Koh Lanta.

Book online to save 10% on scuba diving trips and PADI courses.

Thailand's Best Dive Sites

The beautiful tropical island of Koh Lanta, in the southern Thai province of Krabi, is a perfect base to explore some of Thailand's most spectacular islands and coral reefs.

Many of our favourite dive sites can be found in the Mu Koh Lanta Marine Park, including the Koh Haa Islands, Koh Rok Islands, and for more experienced divers, the famous Hin Daeng & Hin Muang.

Around Koh Phi Phi and the Mu Koh Phi Phi Marine Park, divers can also explore the The Bida Islands, the submerged pinnacle of Hin Bida, the reefs around Koh Phi Phi Leh, and again, for more experienced divers, Shark Point & Anemone Reef, and the HTMS Kledkaeo Wreck.

Wonderful Marine Life

Dive the many healthy and extensive coral reefs, discover weird and wonderful marine creatures, and fall in love with the diving around around Koh Lanta.

Our tropical Marine Life Guide details some of the many hundreds of different creatures we've spotted over the years, hopefully giving you an idea of some of the amazing underwater animals you might find while diving with us around Koh Lanta.

Koh Lanta Marine Life with Dive & Relax

After returning from a dive trip in the early afternoon, our experienced guides love to spend some time with our guests, logging the dives and sharing our knowledge of the wonderful marine life we can often find at the amazing dive sites around Koh Lanta.

Underwater Photographers

The diving around Koh Lanta 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 species that make Koh Lanta the perfect diving destination.

Shallower diving means you get to spend more time underwater, where the colours are most vibrant, and the marine life is most abundant, making this a fantastic destination for underwater photographers.

Get your PADI with Dive & Relax...

Learn to dive with the PADI Open Water Diver course, conducted in small groups over four days. Enjoy great personal attention with typical group sizes of just 2 or 3 students with each PADI professional dive instructor.

PADI Discover Scuba Diving with Dive & Relax on Koh Lanta

After you're certified, if you have time, you can also take the PADI Advanced Open Water Diver course, getting certified to dive deeper, perfecting your underwater skills, and preparing yourself to dive many of the other exciting dive sites around the world.

Try PADI Open Water E-Learning for free

Email us with your full name at info@diveandrelax.com and we'll register you with PADI for a free introduction to the PADI Open Water Diver course.

Download the PADI Training App from your app store and try the PADI Open Water Diver eLearning material before purchasing the full course.

For Apple iOS devices and Android devices, download size approx 74 MB.

Try Scuba Diving - Introduction Dives...

If you've thought about trying scuba diving, Koh Lanta is the perfect place for an introduction to the wonderful underwater world.

Get wet with an instructor, and try our 1-day, 2-dive PADI Discover Scuba Diving experience, including a dive trip to some of our breathtaking coral reefs around Koh Haa, Koh Rok or Koh Bida and the Phi Phi islands.

You will first learn some important scuba diving skills in shallow water at one of our breathtaking dive sites, before going on to explore the same coral reefs and marine life as certified divers, but limited to a maximum depth of 12 m.

If you love your first scuba diving experience, you can go on to get certified with the PADI Open Water Diver Course in just a few more days with one of our friendly and experienced dive instructors here on Koh Lanta.

Snorkel Trips

For non-divers, we offer snorkel trips 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.

Koh Rok Snorkel trips with Dive & Relax, 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 while you're here on Lanta. Or even get your PADI Open Water Diver certification.

Discover the island of Koh Lanta...

Even though it's one of Thailand's best islands for scuba diving and snorkeling, 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.

Best Time to Visit Koh Lanta | Dive & Relax

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 one of our speed boats 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 Dive & Relax within 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 Castaway 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 Lanta scuba 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 Lanta and 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 winds usually brings better weather and sea conditions.

Get more information on the best time for diving and snorkeling around Koh Lanta with check our Weather and Climate guide.

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 easy it is 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.

Book online to save 10% on scuba diving trips and PADI courses.

What Do Our Customers Say?

Check out some of the reviews and comments left on TripAdvisor by our previous divers and snorkelers:

  • Felix A

    You want to do your Open Diver PADI? Then do here!

    Did my PADI Open Water Diver Course in the past days here, plus some additional dives and can't think of any better place to have done it. The whole team is great and I can highly recommend it. Good communication from the Start with Oh & Cameron. Easy Pickups, nice Divesites. Adam, my divemaster, took time to guide me through, give me feedback and I have learnt so much in the past days due to him. Made it my highlight of the holiday. Unfortunately we are switching Places, otherwise I would go for some more dives ;) Thanks to the entire team, you are doing a great job!

    Mar 2022

  • Lis

    Superb diving!

    Had a wonderful time diving, we saw turtels and uncountable other beautiful fish and other sea animals and in the end we intetifies them together and had a good informative chat about the ecological system here. The hole crew is incredible nice and courteous and made us feel safe the whole time, which was important to me after long pause in diving. The diving sites are carefully picked to be private underwater and not crowded with other diving groups and we got there with the schools speedboat. The food on the boat was also very tasty

    Mar 2022

  • Megan C

    Professional and Fun

    As a former dive instructor and now professional offshore diver, I am potentially the hardest to please client imaginable(!). Added to this it was time to get our three kids certified. Open Water not insane, although.....After a good trawl round the available dive schools on Koh Lanta it was obvious from the off these guys are professional, run a slick operation yet retain a sense of fun. The dive gear for hire is all well maintained and of a good standard. Believe me, I checked thoroughly, my kids were going to use it and I am trained to know what I am looking at. Special mention to my children's instructor Oh. Fantastic. Model PADI professional instructor. The kids were utterly enraptured by her. Well taught, safely and of course just as importantly, lots of fun. Day trips were well organised, safe, fun, great food and plenty free drinks. I have no hesitation in highly recommending Cameron and his team whether its to learn diving or just for day trips. I never bother writing reviews usually but credit where its due, these guys deserve it. Keep up the good work.

    Mar 2022

  • Ida K

    Amazing guides and locations

    We did refresher and open water certification with Dive & Relax during our stay on Koh Lanta and could not be happier! The guides are amazing and take great care of you. The dive sites are truly incredible with the warm, crystal clear waters. We saw sharks, turtles and a plethora of fish. Lunch on the boat during was delicious. We would certainly love to dive with this club again in the future!

    Mar 2022

  • Jace Langlois-Davies

    Diving and relaxing

    We had an amazing time diving with Dive & Relax. They are one of the best dive centres we have had the pleasure to dive with. The equipment was in great condition, the staff were fantastic and the food was delicious. There was plenty of fruit and as many drinks as you needed. The speedboat was comfortable and got us to the dive sites quicker than other boats. The staff were so friendly and really good at their jobs. We dived four times and each dive went like clockwork. They were really fun, relaxed and professional. Big thank you to Cameron for organising the dives for us and to our dive master Adam who did a great job looking after us and making it a really enjoyable experience. I would highly recommend this dive centre to anyone visiting Koh Lanta.

    Mar 2022

  • Tanja lassen

    Best diving resort

    We dived at Dive and relax while there were still major problems with the corona. It went well. It's for sure we'll come back and dive with them. It's a really nice dive with them. At the same time, Koh Lanta is probably the best place in Thailand to dive due to the fact that there are many good places to dive. Also than phi phi. It was also great for us that we had an instructor who spoke Danish. We noticed that there were others who also had instructors in their own language. For me, it was also great that special consideration was given to my wife. Once you get in the boat, all your equipment is assembled unless you are on course. I would also definitely recommend their resort to stay at. It is neat and clean and it looks nice. (and the beach is good there too). This was definitely our best diving vacation ever. We had 10 diving days. My best recommendations and thanks to everyone on board Kim Lassen

    Mar 2022

  • Naomi R

    Best diving experience ever!

    The entire experience with the team at Dive & Relax was absolutely wonderful. Cameron kept in contact with us before our trip to Koh Lanta and made sure we had all the information before we began our open water course. My instructor was Adam and I couldn?t have had a better and more pleasant experience for my first time diving. Adam was patient and explained things in such a way that was easy to understand and remember. He also inspired a lot of trust and made me feel safe even when I was anxious or nervous under water. It was extremely important to me to have a good instructor that could help me overcome the fear and bad experiences I had had in the past and Adam was perfect. Thanks again to the entire team at Dive & Relax for such an amazing time!

    Mar 2022

  • Adamski555

    5 Star service

    This is my 5th year diving with Dive and Relax ,I had a brilliant trip to Koh Rok this time ,great email correspondence prior to the trip ,super friendly staff great boat, lovely food,2 super drift dives and than amazing beautiful beach.I will be back.

    Feb 2022

  • Tanja lassen

    Best diving resort

    We dived at Dive and relax while there were still major problems with the corona. It went well. It's for sure we'll come back and dive with them. It's a really nice dive with them. At the same time, Koh Lanta is probably the best place in Thailand to dive due to the fact that there are many good places to dive. Also than phi phi. It was also great for us that we had an instructor who spoke Danish. We noticed that there were others who also had instructors in their own language. For me, it was also great that special consideration was given to my wife. Once you get in the boat, all your equipment is assembled unless you are on course. I would also definitely recommend their resort to stay at. It is neat and clean and it looks nice. (and the beach is good there too). This was definitely our best diving vacation ever. We had 10 diving days. My best recommendations and thanks to everyone on board Kim Lassen

    Feb 2022

  • Iz faber

    Definitely do your training here!

    Do your training here! I loved this experience so much. I did open water with Chris my instructor. Chris had an amazing ability to be incredibly calm and encouraging as you take your first breath underwater. You feel completely safe with her below water, and when you come up to the surface for lunch she provides and great conversation! She's a total pro! I ended up doing 4 more dives. And every single dive was beautiful and safe and now I feel like I really know what I am doing. The water visibility was spectacular, the wildlife we encountered was magnificent. I also had the pleasure of diving with Non. This has been a life-changing experience and the whole team is amazing. From the first Email with Cameron and every single step in between. I will be back as soon as possible.

    Jan 2022

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This is just a small selection of more than 1,200 comments, e-mails and online reviews left by our wonderful customers over the years.

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Diving, Snorkeling & PADI Courses

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  • Please let us know:

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  • If you're already here on Lanta, you can also call us on +66 (0)89 050 3009