Koh Lanta Dive Trips

Avoid the crowds on larger dive boats: Dive and snorkel trips from Koh Lanta in very small groups with a focus on great service, personal attention, safety and fun.

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

Dive Sites and High Season Trip Schedule.

Our spectacular dive sites include Koh Haa Lagoon, a sunning sheltered coral garden with excellent visibility and diverse marine life, the Cathedral which includes a series of interconnected caverns and swim-throughs, offering a unique and thrilling underwater experience.

We're also home to the famous pinnacles Hin Daeng & Hin Muang, known for their dramatic walls, abundant marine life, and frequent sightings of large pelagic species.

We're also very lucky to have some of the most experienced, friendly and professional dive masters and instructors on Koh Lanta in our small team. We love diving and we love sharing our knowledge of the wonderful coral reefs and marine life around Koh Lanta with our guests.

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Fast Boats & Short Journey Times

Departing from the beach each morning at 9 am, our speed boats carry a maximum of 10 diving guests on each of our 11m custom speed boats to some of Koh Lanta's best dive sites.

Typical group sizes are just 2 or 3 certified divers (max 4) with each dive master and even smaller groups of students with each instructor.

We're much closer to most of the dive sites than any other dive shop here on Lanta, including Koh Haa, Koh Rok, and Hin Daeng & Hin Muang.

Journey times to Koh Haa are just 25 - 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.

• Dive trips depart 9am from Long Beach, return around 2pm.
• Local dive sites 25 - 40 minutes journey time.
• Typical group size 2 or 3 Certified Divers with each Dive Guide (max 4).
• Dive trips to Hin Daeng & Hin Muang or Shark Point & Anemone Reef depart 8am, return around 2pm.

Koh Lanta Marine Life

Spectacular Coral Reefs

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

Our diving is easy and relaxed, with relatively shallow reefs, sheltered lagoons, walls, and gentle drop-offs.

You'll also find many of Thailand's best dive sites in the Koh Lanta Marine Park, including the Koh Haa Islands, the Koh Rok Islands, and the famous Hin Daeng & Hin Muang.

Our Koh Lanta Marine Life Guide contains 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.

Our dive trips are the perfect way to explore some of the 52 islands that make up the Mu Koh Lanta Marine National Park.

Scuba Skills Refresh

If you've Not Dived Recently

We understand that those who have not dived for a while might feel a little anxious about getting back into the water.

Even for those who are more confident divers, if you've not been diving for a while, you'll enjoy improved buoyancy, air consumption, and confidence in the water after a Scuba Skills Refresher on Koh Lanta with our experienced dive staff.

We conduct the scuba skills refresher at the beginning of the first dive to help ease you back into the water.

We'll also include a quick theory review and extended dive briefing to make everything as smooth as possible, and ensure that you have the best possible dives around Koh Lanta.

For those who have not dived in a long time, or who are feeling less confident in the water, we can provide a full scuba skills review in confined water the day before your first dive trip on the boat.

Advanced Adventurer Course

If you're already Open Water Certified (or equivalent BSAC, SSAC, CMAS, etc.) and plan scuba diving to Koh Lanta for at least 3 days then you can also take your scuba skills and knowledge to the next level with the SSI Advanced Adventurer course at the same time.

Include 5 Adventure Dives over 3 days of diving, diving deeper, learning how to navigate unknown dive sites, improving your buoyancy, and expanding your knowledge of the amazing underwater world.

Specialty Diver Courses on Koh Lanta

Learn to Be a Better Diver

Enriched Air Nitrox Specialty Course

For Enriched Air certified divers, we have 32% Nitrox available at 250 Baht per tank during the high-season here on Koh Lanta.

If you're not already a Nitrox certified diver, it's really easy to add the SSI Enriched Air Nitrox course here on Lanta to a 2 tank dive trip while you're diving with us.

Deep Diver Specialty Course

Are you tempted to go a little bit deeper on your dives? Do you want to explore shipwrecks, walls and canyons that lie beyond the limits of your current dive certification?

7 reasons why you should take the SSI Deep Diver Specialty course here on Koh Lanta.

Perfect Buoyancy Specialty Course

If you're serious about improving your diving skills and making the most of your underwater experiences, the SSI Perfect Buoyancy Specialty course here on Koh Lanta is an investment in your long-term diving enjoyment.

8 reasons why you should take the SSI Perfect Buoyancy Specialty course here on Koh Lanta.

Navigation Specialty Course

Taking the SSI Navigation Specialty course here on Koh Lanta strengthens your diving skills and increases your self-reliance, making every dive safer, more efficient, and more enjoyable.

6 reasons why you should take the Navigation Specialty course here on Koh Lanta.

Koh Lanta Diving Conditions

The Best Time to Visit

The Andaman Sea offers excellent diving conditions with warm waters, good visibility, and mild to medium currents. These favourable conditions make Koh Lanta a perfect destination for divers of all skill levels.

The best time to visit Koh Lanta is usually October to May, with the best diving conditions usually found between January and early May.

The water temperature is usually fairly constant throughout the year, around 28 - 29 degrees. It's also possible that we might encounter thermoclines at some dive sites, which means patches of cooler water, as low as 26 - 27 degrees for short periods.

Diving from Koh Lanta during low season is often possible, but we can also experience heavy rain and stormy weather for several weeks at a time during the monsoon months of June to September.

Visibility at the dive sites varies throughout the year, with visibility at some dive sites affected by strong currents or stormy weather. Divers can expect average visibility at most dive sites to be 10 - 20 m at the beginning of the season October/November, increasing to 25 - 30+ m later in the season by February/March/April.

Planning Your Dive Trip to Lanta

If you've never been to Koh Lanta then you're in for a really pleasant surprise. Discover why idyllic and laid-back Lanta is the perfect dive destination in southern Thailand.

Find out how to get to Koh Lanta from Krabi, Ao Nang, Koh Jum, Phi Phi, Phuket, or Koh Lipe.

If you're already here on Lanta then dive trip bookings can be made in person at our dive shop in Castaway Resort (south end of Long Beach, about 100m from the 7-Eleven) between 10 am and 4:30 pm.

You can find our dive shop @ Lanta Castaway Beach Resort, located at the southern end of Long Beach.

We need to see all divers at our dive shop at least 1 day before their first trip with us to complete the paperwork, check dive certifications, check equipment sizes, etc.

Koh Lanta Fun Diving Prices

Online bookings save 10%

Fun Diving price at Koh Haa, Koh Rok, Koh Bida and Koh Phi Phi is ฿3,150 for 2 dives. Diving price includes dive guide, free equipment rental, lunch & soft drinks on the boat when booked online in advance.

• You must be certified minimum SSI/PADI Open Water Diver, CMAS 1 Star Diver, BSAC Ocean Diver, or equivalent.
• Scuba Skills Refresher for extra ฿900 when Booked Online (Normal Price ฿1,000).
• Does not include Marine Park Diving Fee: Thai ฿240, Foreigner ฿600, per day.

Far Away Dive Sites

Hin Daeng & Hin Muang Diving Price

Fun Diving price at Hin Daeng & Hin Muang or Shark Point & Anemone Reef is ฿3,950 for 2 dives. Diving price includes dive guide, free equipment rental, lunch & soft drinks on the boat when booked online in advance.

• You must be certified minimum SSI/PADI Open Water Diver, CMAS 1 Star Diver, BSAC Ocean Diver, or equivalent.
• Does not include Marine Park Diving Fee: Thai ฿240, Foreigner ฿600, per day.

Koh Lanta Dive Sites

Some of Thailand's Best Diving

Koh Lanta is perfectly located for some of the best dive sites in Thailand:

Find out more at the Thai Department of National Parks.

Our Dive Trip Schedule

Lanta Dive trips from 15 Oct - 15 May

Our dive trips depart Koh Lanta in the morning every day during high season from the south end of Long Beach, normally returning around 1:30 - 2pm.

• All trips are 2 dives a day
• Trips depart from the beach at our dive shop @ Lanta Castaway Beach Resort
• Trips Depart 8/9am, return 2pm
• Dive & Relax is open from Oct 15 - May 15.
• E-mail us info@diveandrelax.com in advance with any questions, or to make a booking.

We may schedule a Shark Point & Anemone Reef dive trip or a KledKaeo Wreck & Hin Klai dive trip upon request. A minimum of 5 divers are required for these trips, please let us know if you are interested.

We love to dive as much as possible during the high season, however all our dive trips depend on the weather, sea conditions, currents and minimum numbers and may be subject to change at short notice.

For more information on our weather and climate, check out the best time to visit Koh Lanta.

Additional Tips for Divers

• Stay Hydrated: Diving can be physically demanding, so it's essential to stay hydrated. Drink plenty of water before and after your dives.
• Rest Well: Ensure you get adequate rest before diving, especially if you plan on multiple dives over several days.
• Respect Marine Life: Always practice responsible diving by maintaining a safe distance from marine creatures and avoiding touching or disturbing the coral reefs.
• Follow Your Guide: Listen to your dive instructor or guide's briefing and follow their instructions for a safe and enjoyable dive.
• Log Your Dives: Keep a dive log to record your experiences and track your progress as a diver.