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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:

  • Niklas

    Wunderschöner Tauchgang alles war Perfekt

    Ich habe mich auf Grund der vielen Positiven Bewertungen für die Tauchschule entschieden. Und kann diese nur wieder geben ich war absolut zufrieden. Vom Breefing bis hin zum Tauchgang war alles perfekt. Es wurde einem immer alles in ruhe erklärt man hat sich immer sicher und wohl gefühlt. Der Tauchspot war sehr schön wir haben viele Fische gesehen und eine Schildkröte. Wir sind zwei verschiedene Spots getauscht

    Nov 2022

  • cassjax

    Excellent dive school

    I am not a confident diver and I get very seasick if on the boat for too long. The idea of a whole day was almost overwhelming but as soon as we visited Cameron at the dive school a couple of days before he put me completely at my ease, advised on seasickness medications and we were away. Karl was our instructor on the day and he pre briefed us at the school before we left and then helped us all day on the boat and diving. He was fantastic too, kind, patient and calming. We completed two dives at Koh Haa which were superb, lots of fish and coral to see. Thoroughly enjoyed the day and thankfully no seasickness at all!

    Nov 2022

  • Emma

    100% recommend this Dive and Relax on Koh Lanta

    An amazing experience. An extremely well organized diving school with incredible instructors. I completed my PADI open water course with my amazing instructor Judith. The course was very thorough, safety was a priority but it was also great fun. I had a lovely few days getting to know the instructors and other divers and feel fully confident in the water as a diver after the course. The dive sites themselves are also very very impressive. I 100% recommend this diving school on Koh Lanta.

    Nov 2022

  • joost83

    Great snorkeling experience

    Really great tour operator with a lot of knowledge and everything was perfectly organized. We did the snorkeling to Ko Haa and that was really beautiful. We had one guide for ourselves, Judith, who was really nice and guided us perfectly. Can definitely recommend.

    Nov 2022

  • Antipest

    Great outfit

    Just done 5 days diving with D&R and I can recommend them highly. All communication is handled quickly and efficiently by Cameron, the owner, no hard sell just factual info. The boat is a speedboat which means most trips are 30 minutes away apart from Din Daeng & Din Muang which is 60-70 minutes away (a must do dive). You board the boat at the resort/dive school and get to the sites before the rabble turns up! returning to the resort for about 13.30-14.00. The dive staff are a mix of British, Danish, Thai's and a few other nationalities. All are very patient, knowledgable and have a great knack of spotting all those tiny creatures that makes it all worthwhile. Safety is paramount on dives and they make sure everyone is fully briefed and they match up groups according to diver experience. The boat captain and his staff are very helpful in kitting up along with getting in and out of the water, it really is a 'dive & relax' experience. Between dives a Thai meal of rice, veg and meat (or veggy option) is served which is excellent, along with free pour complimentary soft drinks. I recommend pre-booking the diving as it appears the boat fills up quickly and I missed out on 2 days diving due to a full boat and my inability to get my act together!! Thank you to Cameron, Or, Tor, Nan(?) Adam and all the boat crew for all you hard work. Mark.

    Apr 2022

  • Coco L

    The best diving experience ever!

    We dove four times with Adam (one refresh and three fun dives) and each time was an enjoyable experience. Can't recommend Adam more! He is super patient and attentive. He is also good at spotting sea creatures, from tiny cleaning shrimps to fast-moving reef sharks. The whole diving crew are professional and friendly. Even if we didn't dive for more than two years due to Covid-19, we felt safe and comfortable to return to the underwater world with Dive and Relax. We also appreciated that Dive and Relax only organized small group tours (in our experience, max 9 divers) which made the diving trip easy. (No need to rush and everyone had enough space on the boat). Food was good, too! The diving sites were superb! We had the visibility of 20 meters at some spots, and marine ecosystems were both healthy and diversified. At our dive in Koh Bida, we saw a school of yellow fish coming down from a wall just like a waterfall. Amazing!

    Apr 2022

  • Cathy G

    Amazing Diving & snorkelling experience

    Our family of 5 went diving, completed Padi's & went snorkelling with the fantastic Dive & Relax. Great quality equipment, boat and the staff couldn't have been better - we felt safe at all times. Thank you so much for a wonderful few days Thank you Cameron, Oh & the rest of the wonderful Dive & Relax team x

    Apr 2022

  • Petruska72

    Lo mejor de nuestro viaje

    Excelente de principio a fin. Hicimos el bautismo toda la familia y debo decir que fue una experiencia increíble para todos, la profesionalidad y el trato exquisito que tuvieron Cameron, Oh y Adam en el agua y fuera de ella fue de diez. Bajo el agua estuvieron totalmente pendientes de nosotros, sobre todo de mi hija pequeña (12) haciendo que su primer contacto con el buceo fuera una experiencia maravillosa para ella. Sin duda volveremos a finalizar nuestro curso PADI con ellos y recomendamos 100% esta escuela. Mil gracias por hacernos pasar los mejores momentos de nuestro viaje a Tailandia.

    Apr 2022

  • 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

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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.

You can find 100's more reviews of our excellent service:


Diving, Snorkeling & PADI Courses

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  • Please let us know:

    • when will you arrive on Koh Lanta?
    • your previous dive experience?
    • which diving activities you are interesed in?
  • If you're already here on Lanta, you can also call us on +66 (0)89 050 3009