Snorkeling Ko Lanta: 4 Islands and Emerald Cave

Swim into a hidden cave, then snorkel reefs teeming with clownfish

A full-day snorkeling trip from Ko Lanta to four islands in the Trang Sea, with hotel pickup and an English-speaking guide. You snorkel at Koh Chueak and Koh Ngai, swim into Emerald Cave at Koh Mook, and spend free time on Koh Kradan's beach after lunch. The tour runs 8 hours and includes life jacket, snorkeling mask, buffet lunch, water and fruit. A national park fee of 200 baht per adult and 100 baht per child is paid at entry.

Step-by-step itinerary

Stops and time at each

1. Emerald Cave8h · entry included
2. Koh Kradan1h 30m

Explore 4 Islands and Emerald Cave

• Pick up at hotel
• Depart from pier to 4 Islands
• Snorkel at Koh Chuek
• Visit and swim through Emerald Cave
• Lunch at Koh Kradan
• Relax and sunbathe on Koh Kradan beach
• Snorkel at Koh Ngai
• Return to pier
• Transfer back to hotel

The experience

The boat leaves your hotel between 8 and 9 in the morning and heads to Koh Chueak first, where you get 40 minutes in the water with a snorkeling mask and life jacket provided. The reef here is thick with colorful fish. From there the boat takes you to Koh Mook and Emerald Cave: the centerpiece of the day. You swim into the cave opening and float inside to a hidden beach ringed by limestone cliffs and dense forest, the water inside the cave pale green and still. The cave is one of the few in Thailand accessible this way.

After the cave, the boat heads to Koh Kradan for lunch. The buffet is served on the beach, and you get free time to swim, sunbathe or rest before the afternoon snorkeling. The last stop is Koh Ngai, where you snorkel for 45 minutes among more reef and marine life. The boat returns to the pier by 3:45pm and transfers you back to your hotel by 4pm. The guide speaks English throughout and carries a first aid kit. Weather and sea conditions can shift the order of stops or timing.

A minimum of 10 people is required to run the tour. If the operator needs to cancel, you'll be offered a different date, an alternative tour, or a full refund. The tour is not recommended for pregnant travelers or anyone with spinal injuries, high blood pressure, heart disease or bone disease. It is suitable for all other fitness levels. Children from age 4 onward can join (children aged 1–3 travel free but do not get a child ticket).

What’s included

• Hotel pickup and return transfer.
• English-speaking guide.
• life jacket and snorkeling mask.
• buffet lunch with drinking water and fresh fruit.
• first aid kit and accident insurance.

Before you book

Days and timesEvery dayDeparts at 09:00

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

Meeting point and pickupHotel pickup is optional; you can also go straight to the meeting point. Ends back at the starting point.Operator's directions: “Or, you can also get picked up”

Cancellation and refundsFree cancellation up to 24h before the start. After that, no refund.It may be canceled due to bad weather or 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

Easy physical levelPublic transport nearbyNot for pregnant travelersNot for heart conditionsNot for back problems

Operated by Oh-Hoo

Is this one for you?Choose this shared boat if you want to visit all four major islands and Emerald Cave in one day with set stops and a group pace, rather than customize your own route.

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Top questions

Can children come?

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

What happens if it rains?

It may be canceled due to bad weather. If that happens, you're offered another date or a refund. Free cancellation up to 24h before the start.

What is Emerald Cave like when you swim inside it?

Emerald Cave at Koh Mook is a limestone cavern you enter by swimming through the cave mouth. Inside is a small hidden beach surrounded by towering cliffs and forest, with pale green water. It is one of the few caves in Thailand you can access this way, and the operator lists it as the highlight of the day.

How much snorkeling time do you actually get?

You snorkel for 40 minutes at Koh Chueak in the morning and 45 minutes at Koh Ngai in the afternoon, for a total of about 85 minutes in the water. Both stops feature coral reef and abundant marine life including clownfish.

What's included in the lunch, and how long is the beach break?

Lunch is a buffet served on Koh Kradan beach. After eating, you have free time from around noon to 1:30pm to swim, sunbathe or relax on the beach before the final snorkeling stop.

Do I need to arrange my own transport to the pier, or is pickup included?

Hotel pickup is included. The boat collects you from your accommodation between 8 and 9am and returns you there by 4pm. Public transportation options are available nearby if you need an alternative.

What happens if the weather is bad or the sea is rough?

The tour itinerary is subject to change due to weather and sea conditions. The operator may alter the order of stops or timing. If conditions require cancellation, you'll be offered a different tour date, an alternative tour, or a full refund.