Snorkel Tour to Koh Nangyuan and the hidden bays of Koh Tao onboard the Oxygen

Koh Nangyuan’s three linked islands and Koh Tao’s string of hard-to-reach coves are the main draw here. You get a 15-minute viewpoint hike, several snorkel stops, lunch, and hotel transfers in one seven-hour outing, which makes this a practical way to see a lot without arranging separate boats.

I like the range of water stops, from the shallow Japanese Reef Garden to deeper bays where turtles and reef sharks have been spotted. I also like the price: $27.72 per person is strong value once you add the boat, guide, food, equipment, and transfers. The catch is crowd size. The Oxygen may carry as many as 120 people, so this is a social boat trip, not a quiet private escape.

Key points

• Koh Nangyuan viewpoint: A short uphill walk rewards you with the classic view of three islets joined by pale sand.
• Several reef stops: The route can include Japanese Reef Garden, Mango or Lighthouse Bay, Hin Wong Bay, Ao Leuk, and Shark Bay.
• Good-value package: The fare includes hotel transfers, a Thai lunch, drinking water, hot drinks, fruit, life jackets, a guide, and basic accident insurance.
• Real wildlife chances: Turtles, anemones, colorful fish, blacktip reef sharks, and coral have all been spotted, though nature sets the schedule.
• Large-group setup: The boat can accommodate up to 120 people, so expect a busy deck and shared water time.
• Weather matters: Sea conditions can force the crew to change or shorten the route.

Why this Koh Tao boat trip makes sense

If you have only one full day for snorkeling around Koh Tao, this outing covers a lot of ground. You leave from Mae Haad Pier, cross to Koh Nangyuan, then work around several bays on Koh Tao before returning to the pier and your hotel.

That broad route is the real value. You are not relying on one reef or one beach to make the day worthwhile. If visibility is poor at one stop, the crew may try another. If wind blocks a planned bay, the program can change to suit sea conditions.

The price is listed at $27.72 per person. You must add the Koh Nangyuan admission fee of THB 250 per adult, or THB 120 for a child. Children taller than 120 centimeters pay the adult entrance fee. Even with that extra charge, the package remains inexpensive for a full day on the water with food, equipment, and transport included.

You should think of this as a value-focused group excursion. It gives you access to places that are difficult to reach overland, but you give up some peace and personal space. The maximum group size is 120, and the boat may carry more than 100 people. That is manageable if you are happy with a lively deck, but it is not the right setup for quiet snorkeling or individual attention.

Starting at Mae Haad Pier and Koh Nangyuan

The usual morning schedule begins with hotel pickup from 9:00 to 9:30, check-in at Mae Haad Pier, and a boat departure around 10:00. The crossing to Koh Nangyuan takes only a short time from Koh Tao.

A morning and an afternoon departure are offered. The morning option suits you if you want cooler temperatures and softer early light. The afternoon option works better if you prefer a slower start, though the exact order and timing of stops can change.

At Koh Nangyuan, the first job is a walk to the viewpoint. The climb takes about 15 minutes and leads to the high point above the three small islands. From there, you can see the famous sandbar connecting the islets, along with the water on both sides.

The walk is short, but it is uphill. Bring shoes that are easy to walk in, then keep them with you until you reach the beach or boat. The viewpoint is one of the most photographed sights in the area, so expect other people on the path and at the top.

You get about an hour at the island. That sounds generous, but the time includes moving from the boat, walking up, taking photographs, and returning for water activities. Follow the crew’s timing closely. Missing the boat departure is not a pleasant way to extend your island visit.

Koh Nangyuan has an entrance fee that is not included in the tour price. Bring enough Thai baht for the charge, and remember that the adult rate applies to children over 120 centimeters tall.

Japanese Reef Garden and the first snorkel

The Japanese Reef Garden is described as a shallow reef area on the eastern side of Koh Nangyuan. This is a useful first snorkeling stop because shallow water can make it easier to see coral shapes, small fish, and anemones without needing to swim far from the boat.

The reef has a reputation as one of Koh Nangyuan’s best snorkeling areas. I would set your expectations sensibly. Water clarity, tide, sunlight, and the number of swimmers all affect what you see. The reef may look different from one visit to the next.

You can expect the guide to explain the basic equipment and give instructions before you enter the water. Life jackets are supplied, and snorkeling equipment is provided as part of the outing. If you are not a confident swimmer, tell the crew before getting in rather than trying to manage quietly at the back of the group.

This stop is also where crowding may be most noticeable. A large boat means many people may enter the same shallow reef at roughly the same time. Stay aware of fins and swimmers, and avoid touching coral or standing on the reef.

Mango Bay or Lighthouse Bay

The next part of the route can include Mango Bay or Lighthouse Bay. The schedule allows about an hour for this stop, though the actual choice depends on sea conditions and the day’s route.

Mango Bay is one of Koh Tao’s more secluded coastal areas, while Lighthouse Bay offers a different setting around the southern part of the island. The appeal is not simply the name of the bay. These places give you a look at coves that are awkward to reach by land and easier to visit from the water.

There is one practical wrinkle. Hotel transfers are not offered from Mango Bay or Lighthouse Beach. That matters if your accommodation is in one of those areas. Confirm the pickup arrangement before booking rather than assuming every Koh Tao hotel is covered.

This is also a good point to take a break, eat some fruit, or have water. Drinking water, coffee, tea, and fresh fruit are included. Lunch is Thai style, and plant-based meals have been accommodated according to the available information, but you should communicate dietary needs ahead of time.

Hin Wong Bay, Ao Leuk, and Shark Bay

The middle and final section brings several stops close together. The published schedule allows time at Hin Wong Bay, Ao Leuk, and Shark Bay, but the crew may adjust the order or skip bays if the weather turns rough.

Hin Wong Bay is known for colorful fish and coral. It is a good place to keep your mask sealed, move slowly, and look beyond the first group of fish near the boat. You might see a good mix of smaller reef life here, though no wildlife sighting is guaranteed.

Ao Leuk is scheduled as a shorter swim in clear water. A 40-minute stop is enough for a focused snorkel and a quick swim, but it is not a long beach visit. If you want extended time on sand, this itinerary is not built around that. It is built around repeated water access.

Shark Bay is the final planned snorkel stop. The name can sound dramatic, but the point is not a guaranteed shark encounter. Blacktip reef sharks have been seen here, along with turtles and other marine life, but the animals move freely. Some outings produce memorable sightings, including sea turtles, while others may offer mainly fish and coral.

The final stop is a good reason to keep some energy in reserve. After several swims, a climb, sun, and a boat ride, you may be ready for a quieter look rather than another long session. Drink water and use the breaks between stops.

Wildlife, coral, and what you might see

This route gives you several chances to see marine life, which is more useful than promising one spectacular encounter. Turtles have been seen at Shark Bay, and one outing even produced sightings of two turtles. Blacktip reef sharks have also been spotted, as well as anemones, coral, and large numbers of colorful fish.

Still, you should book this for the variety of reefs and bays, not for a guaranteed turtle or shark photograph. The guide cannot control visibility or animal movements. The crew may take photographs during the day, and pictures have sometimes been made available afterward at no extra charge, but you should not rely on a particular image package unless the crew confirms it.

Coral deserves care. Keep your fins away from the reef, do not stand on coral, and avoid touching marine life. In shallow water, even a small kick can damage something that took years to grow.

A basic accident insurance policy is included, but that is not a substitute for sensible swimming habits or travel insurance. If you get seasick, the open-water sections may be uncomfortable. Several people have found the sea choppy, especially when weather conditions change.

Food, crew, and the large Oxygen boat

The package includes a Thai-style lunch, fresh fruit, drinking water, coffee, and tea. Food is served as part of a busy day, so think of it as practical fuel rather than a long restaurant meal.

Food quality can vary. Some diners have found lunch tasty, while others have found it basic or less appealing, especially when food sat out in warm conditions. If food is an important part of your day, keep expectations moderate and bring any essential snacks that you know you can eat.

The English-speaking guide and boat crew handle equipment, timing, and route changes. The strongest praise for the crew focuses on friendly service, clear instructions, and a willingness to keep the day enjoyable when weather disrupts the plan. That matters on a group boat, where good organization can make a busy trip feel manageable.

The boat is the main point of compromise. The Oxygen can take up to 120 people, and the deck may feel crowded during boarding, meals, and equipment collection. You may need patience when entering the water or returning to the boat.

If you want a quiet boat, personal space, or a slower pace, pay more for a small-group option or arrange a private longtail boat. If you mainly want to reach several snorkel sites for a low price, the large boat is a reasonable trade.

Timing, transfers, and weather changes

The full outing lasts about seven hours. A typical day includes hotel pickup, check-in at Mae Haad Pier, the crossing to Koh Nangyuan, the viewpoint, snorkeling, lunch, several bays, and the return transfer.

Pickup and drop-off are included for most Koh Tao hotels. They are not included from Mango Bay and Lighthouse Beach. Confirmation is provided when you book, so read the pickup message carefully and respond if your accommodation is in an outlying area.

The program is subject to weather and sea conditions. This is not a minor note. Wind can make the crossing rough, reduce water visibility, or make a bay unsafe. The crew may change the route or leave out stops. That can be disappointing, but a changed route is better than forcing a fixed schedule in poor conditions.

If bad weather cancels the activity, you can choose another date or receive a full refund. You can also cancel for a full refund if you do so at least 24 hours before the start time. Changes or cancellations made within 24 hours are not accepted for a refund.

Who should book this tour

I would choose this outing if you want a full day of snorkeling without arranging transport, food, equipment, and several separate boats. It suits first-time visitors to Koh Tao, couples on a budget, families whose children can participate, and anyone who wants to combine a viewpoint with water time.

It is especially useful if you want to see more than one part of the island. The route includes Koh Nangyuan plus several Koh Tao bays, so you are not tied to a single beach.

I would hesitate if you dislike crowds, get seasick easily, or want long, quiet time at each reef. A small-group or private boat will give you more room and control, though likely at a higher price.

Should you book the Oxygen snorkeling trip?

Book it if your priorities are low cost, many stops, and simple logistics. The fare covers a surprising amount: transfers, a guide, snorkeling equipment, life jackets, food, drinks, fruit, and a full day on the water. The chance of seeing turtles, sharks, and plenty of fish adds real excitement, even though wildlife is never promised.

Skip it if the thought of a boat carrying up to 120 people ruins the day before it starts. For everyone else, this is a practical Koh Tao introduction with a busy but worthwhile route, strong overall value, and enough variety to make weather-related changes less damaging.

FAQ

How long does the snorkeling tour last?

The experience lasts approximately seven hours, including hotel pickup, the boat trip, island visits, snorkeling stops, and the return transfer.

Is hotel pickup included?

Round-trip hotel transfer on Koh Tao is included, except for pickup from Mango Bay and Lighthouse Beach.

How much is the Koh Nangyuan entrance fee?

The adult entrance fee is THB 250 per person. The child fee is THB 120 per person. Children taller than 120 centimeters pay the adult fee.

Are snorkeling equipment and life jackets provided?

Yes. Snorkeling equipment and life jackets are included, along with an English-speaking guide.

Is lunch included?

Yes. A Thai-style lunch is included, as well as drinking water, coffee, tea, and fresh fruit. Vegan food has been catered for on some outings.

How many people can join the boat trip?

The maximum group size is 120 people. The boat may carry more than 100 people, so you should expect a large-group setting.

What happens if the weather is bad?

The route may change because of weather and sea conditions. If the activity is canceled due to poor weather, you can receive a full refund or choose a different date.