Snorkeling Koh Lanta: 4 Islands and Emerald Cave by Speedboat

Swim into Emerald Cave, then snorkel reefs thick with clownfish and coral.

A full-day snorkeling tour from Koh Lanta visits four islands by speedboat, with the highlight being Emerald Cave at Koh Mook: a limestone cavern opening onto a hidden beach. The itinerary includes 40 minutes of snorkeling at Koh Chueak, time inside the cave, lunch and free beach time on Koh Kradan, then another 45 minutes of snorkeling at Koh Ngai. Hotel pickup starts at 8am. Return is around 4pm. A live English-speaking guide, snorkeling mask, life jacket, lunch, drinking water and fruit are included.

Step-by-step itinerary

Stops and time spent at each

1. Emerald Cave1h
2. Koh Kradan1h 30m

Explore 4 Islands by Speedboat

• Pick up at hotel
• Depart from pier to 4 Islands
• Snorkel at Koh Chuek
• Visit Emerald Cave at Koh Mook
• Travel to Koh Kradan for lunch
• Relax and sunbathe on Koh Kradan beach
• Snorkel at Koh Ngai
• Return to pier
• Transfer back to hotel

The experience

The day starts with hotel pickup and a speedboat ride to Koh Chueak, where you get your first 40 minutes in the water among colorful reef fish. From there the boat takes you to Koh Mook and Emerald Cave: the centerpiece of the tour. You swim or wade into the cave entrance and float into a limestone chamber that opens onto a small beach ringed by cliffs and forest, the water inside so clear it gives the cave its name. There's time to explore and take photos before heading to Koh Kradan for lunch.

Lunch is a buffet served on Koh Kradan, and the afternoon is yours to swim, snorkel in the shallows or rest on the sand. The final stop is Koh Ngai, where you get another 45 minutes in the water with the same marine life: clownfish, coral, small tropical species. The boat returns to the pier by 3:45pm, and you're back at your hotel by 4pm.

The tour runs with a minimum of 10 people and is subject to change if weather or sea conditions turn rough. A guide in English is with the group the whole day. Snorkeling gear, life jacket and a first aid kit are provided. Bring your own towel, sunscreen, hat and camera. National park entry fees (400 baht per adult, 200 baht per child) are paid separately at the pier.

What’s included

• Hotel pickup and return transfer.
• English-speaking guide for the full day.
• snorkeling mask, life jacket and first aid kit.
• buffet lunch on Koh Kradan.
• drinking water and fresh fruit.
• accident insurance.

Before you book

Days and timesEvery dayDeparts at 09:00

Book up to10h before

AgesAdult (12 to 80 years) · Child (4 to 11 years) · Infant (1 to 3 years): free

GroupUp to 30

Live guideEnglish

Meeting point and pickupHotel pickup is optional; you can also go straight to the meeting point. Ends back at the starting point.

Cancellation and refundsFree cancellation up to 24 h before the start. After that, no refund.It may be canceled if the minimum number of travelers isn't reached. If that happens, you're offered another date or a refund.

Prices and times updated yesterday

Good to know

Low physical effortPublic transport nearbyInfants must sit on laps

Operated by Oh-Hoo

Is this one for you?This is a shared group tour with a minimum of 10 people, so you travel with other visitors and follow a set itinerary and schedule. Choose it if you want a full day of snorkeling and island exploration without arranging your own boat or guide, and if you're comfortable in a group and following a fixed timeline.

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Top questions

Can children come?

Yes. Ticket types: Child (4 to 11 years); Infant (1 to 3 years): free.

What is Emerald Cave like when you get there?

Emerald Cave at Koh Mook is a limestone cavern with an opening that leads into a chamber with a small beach inside, surrounded by high cliffs and forest. The water inside is exceptionally clear, which is why it's called Emerald Cave. You swim or wade in and have time to float around and explore the space.

How much time do you actually spend snorkeling on this tour?

You get 40 minutes of snorkeling at Koh Chueak in the morning and another 45 minutes at Koh Ngai in the afternoon, for roughly 85 minutes of time in the water with your mask and snorkel. The rest of the day is spent traveling between islands, exploring Emerald Cave, having lunch and relaxing on the beach.

What fish and marine life will I see while snorkeling?

The reefs around these islands are home to clownfish (the Nemo fish), along with other colorful tropical species and coral. The operator notes an abundance of marine life in the coral reef, though specific species vary by location and season.

Does the tour include lunch and drinks?

Yes, a buffet lunch is served on Koh Kradan, and drinking water and fresh fruit are provided throughout the day. You have free time after lunch to relax and swim on the beach before heading to the final snorkeling stop.

What time does the tour start and end?

Hotel pickup begins at 8am, and the boat departs the pier at 9am. You return to the pier by 3:45pm and arrive back at your hotel around 4pm, making it a roughly seven-hour day.