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

See Koh Tao from the water.

This seven-hour Oxygen snorkeling tour combines the famous sandbar and viewpoint of Koh Nangyuan with several quieter bays around Koh Tao. I like the wide range of stops, from the Japanese Reef Garden to Shark Bay, and I like that hotel pickup, equipment, lunch, fruit, and drinks are included. The main drawback is size: the boat can carry up to 120 people, so this is not the trip for a quiet, private outing.

At $27.72 per person, the tour offers a lot for the money. You get a full day on the sea, five possible snorkeling areas, a Thai-style meal, an English-speaking guide, and return transport. Still, you must add the Koh Nangyuan entrance fee of THB 250 per adult, and the route can change sharply with wind and waves.

Key points before you book

• Five snorkeling areas can fill most of a seven-hour day, including Mango Bay or Lighthouse Bay, Hin Wong Bay, Ao Leuk, and Shark Bay.
• Koh Nangyuan includes a 15-minute walk to a famous viewpoint, followed by time at the shallow Japanese Reef Garden.
• Hotel pickup and drop-off are included, except for hotels in Mango Bay and at Lighthouse Beach.
• The boat is large, with a maximum of 120 people, which keeps the price low but can make boarding and water access feel busy.
• Sea turtles, reef sharks, colorful fish, coral, and anemones are possible sightings, though wildlife is never guaranteed.
• Morning and afternoon departures are available, giving you a choice between early light and a slower start.

Why this low-cost boat trip works

Koh Tao is easy to admire from shore, but many of its best swimming areas face the sea rather than the road. A boat lets you reach coves, cliffs, caves, and beaches that would take more effort to visit overland. This matters most if you have only a short stay and want to see several parts of the island in one day.

The tour is also simple to arrange. Pickup normally runs from your Koh Tao hotel between 9:00 and 9:30 for the daytime departure, followed by check-in at Mae Haad Pier. You then return to the pier around 16:30 to 17:00, with a transfer back to your hotel.

The stated price is excellent for what is included. Drinking water, coffee, tea, fresh fruit, a Thai-style lunch, a life jacket, basic accident insurance, and a professional English-speaking guide are all part of the package. The extra entrance charge at Koh Nangyuan is the main cost to remember.

The high rating of 4.8 from 190 ratings, with 96 percent recommending the experience, reflects its strong value and friendly crew. Yet the low scores point to a real issue: some people find a boat carrying more than 100 people too crowded. I would book it for affordability and variety, not for personal space.

Morning light or an easier afternoon start

You can choose a morning departure if you want cooler conditions and softer light at Koh Nangyuan. It is the better choice for early risers and for anyone hoping to enjoy the viewpoint before the day feels too hot.

The afternoon option suits you if you prefer a slower morning. The available schedule shows the boat visiting several snorkeling areas from early afternoon through the late afternoon, then returning to Mae Haad Pier. Exact timing and stop order can change with sea conditions, so treat the times as a guide rather than a promise.

Pickup arrangements are handled before the outing, and one useful detail is that the crew may contact you by message the night before. If you are arriving by ferry from Koh Samui, allow extra breathing room. One guest whose ferry was delayed said the Oxygen staff helped adjust the arrangements, but I would still send the operator your arrival details as soon as possible.

Hotels in Mango Bay and at Lighthouse Beach are excluded from the regular pickup service. If you are staying in either area, ask about the meeting arrangement before paying.

Koh Nangyuan and the 15-minute viewpoint walk

The first major stop is Koh Nangyuan, only a short boat ride from Koh Tao. Its three small islands are joined by pale sand, and the viewpoint gives you the classic high view across the narrow strips of beach and surrounding sea.

The walk to the top takes about 15 minutes. It is short, but you should wear secure sandals or shoes and carry water. The path is part of the reward, though anyone uncomfortable with steps or warm-weather exertion may prefer to spend more time at the shore.

The entrance fee is not included. Adults pay THB 250, while children pay THB 120. A child taller than 120 centimeters is charged the adult rate, so families should budget accordingly.

Koh Nangyuan can be busy, especially at the viewpoint and along the sandbar. The stop still earns its place because you get both a memorable view and access to one of the area’s best-known shallow reef sites. If photography matters to you, go early if possible, when light is gentler and the walk may feel less exposed.

Japanese Reef Garden: easy water and plenty of fish

After the viewpoint, the tour gives you time at the Japanese Reef Garden on the eastern side of Koh Nangyuan. The water here is shallow, and the reef has soft corals, anemones, and many small fish.

This is a friendly introduction for less confident swimmers because you can remain in relatively shallow water while watching the reef below. You still need to follow the guide’s instructions and wear the provided life jacket if advised. Life jackets are included, as is the basic snorkeling equipment, according to the tour details and direct trip accounts.

The shallow setting does not mean the stop lacks interest. Several people reported seeing anemones, schools of fish, and coral here and at the later sites. One particularly fortunate outing included two turtles, while another included a turtle called Dimitri and complimentary photographs taken during the day.

Do not treat those sightings as a promise. Marine life moves around, and visibility depends on weather, current, and crowd levels. The sensible reason to book this tour is access to multiple sites, which gives you more chances to see something special.

Four Koh Tao bays, each with a different feel

The longer middle section visits several bays around Koh Tao. The planned afternoon sequence includes Mango Bay or Lighthouse Bay, Hin Wong Bay, Ao Leuk, and Shark Bay. Together, these stops provide more variety than staying at one beach.

Mango Bay or Lighthouse Bay

The first bay may be Mango Bay or Lighthouse Bay. Both are reached by boat, and their inclusion gives you access to parts of the coast that are less convenient to reach by road.

Pickup is not offered from Mango Bay or Lighthouse Beach, so this exception matters mainly to people staying there. For everyone else, the regular hotel transfer keeps the day easy.

Hin Wong Bay

The next scheduled stop is Hin Wong Bay, where you can snorkel among colorful fish. The tour description gives this stop about an hour, enough time to get comfortable in the water and look around without rushing through the site.

The crew’s guidance is useful here. Several strong ratings praised the clear explanations and patient help with equipment. That makes the outing a better fit for a mixed group, especially when some people are experienced snorkelers and others are trying it for the first time.

Ao Leuk

Ao Leuk is listed as a shorter swim stop, with about 40 minutes in clear water. That is enough for a focused look at the reef, though you may find the visit brief if conditions require delays elsewhere.

Clear water does not guarantee perfect visibility on every departure. Weather can force the boat to skip a bay or switch to another location. One outing lost three planned stops because of poor conditions, while still finding alternative snorkeling areas. This is one of those days when flexibility matters more than a fixed checklist.

Shark Bay

The final snorkeling stop is Shark Bay. Despite the name, the attraction is the chance to see marine life in a scenic bay, not a guarantee of sharks. Blacktip reef sharks have been seen on some trips, and sea turtles have also appeared here.

Multiple outings reported turtle sightings, including one at Shark Bay. That makes it one of the more exciting parts of the route, but you should not expect wildlife on demand. Keep your eyes open, listen to the guide, and remember that coral and smaller fish are often the more dependable reward.

Lunch, fruit, and the large-boat tradeoff

A Thai-style lunch is included, along with drinking water, coffee, tea, and fresh fruit. Vegan food has been available on at least some departures, but if you have a specific dietary need, tell the operator in advance rather than relying on a general assumption.

Food quality appears less consistent than the snorkeling. Some people found the lunch and snacks tasty, while another found the meal disappointing. One complaint also raised concern about food being left in the sun. I would bring a small personal snack if you are particular about meals, though the included food remains a useful saving at this price.

The boat’s capacity is the more important practical issue. The maximum is 120 people, and the operator says the boat can accommodate more than 100 without being crowded. In practice, your sense of comfort will depend on how much deck space and personal quiet you want.

A large boat has advantages. It helps keep the price down, provides room for equipment, and can feel stable compared with a small longtail in choppy water. It also means more people entering the water at each stop. If you want a calmer outing, a private longtail or a small-group option with around 25 people may suit you better, but it will not offer the same low price.

Weather, sea conditions, and the real schedule

This is a sea trip, not a fixed bus route. Wind and waves can change the order of the stops, replace a bay, or cancel the outing. The operator promises either another date or a full refund if poor weather causes cancellation.

Choppy water can also affect you even when the tour runs. If you are prone to seasickness, take that seriously and prepare before departure. One strong rating specifically warned that the water can become rough.

The crew appears willing to improvise. On a day with bad weather, the route changed but the group still had enjoyable snorkeling and helpful explanations. That is the right attitude for Koh Tao: the sea decides the program.

Free cancellation is available up to 24 hours before the start time. Changes or cancellations inside that window are not accepted for a refund, so check the weather and your ferry plans before the deadline.

Who will enjoy the Oxygen tour most

I would choose this outing if you want many sights for one modest price. It works well for couples, families, first-time snorkelers, and anyone who prefers having transport, food, gear, and a guide arranged in one booking.

It also suits people who want to see more of Koh Tao than the beaches near their hotel. The combination of viewpoint, sandbar, coral, fish, bays, and a possible turtle sighting creates a full day rather than a short swim stop.

I would hesitate if you dislike crowds, need a quiet boat, or want complete control over the route. The boat may carry up to 120 people, and some planned stops can disappear when the sea turns rough. In that case, compare the price with a private boat or a small-group trip.

Most people can participate, according to the operator. Still, you should be comfortable boarding a boat, walking to the viewpoint, and swimming or floating in the sea with a life jacket. Ask about any personal concerns before booking.

Is this Koh Tao snorkeling tour worth booking?

Yes, if value and variety matter more than privacy. For $27.72, the tour covers a remarkable amount: hotel transfers, several reef areas, Koh Nangyuan, lunch, drinks, equipment, a guide, and the chance to see turtles or reef sharks.

Book the morning departure if you want cooler conditions and better early light. Choose the afternoon if sleeping late matters more. Add the THB 250 Koh Nangyuan fee to your budget, prepare for possible choppy water, and accept that weather may rewrite the route.

My practical verdict is simple: book the Oxygen if you want an affordable introduction to Koh Tao’s best-known snorkeling areas and do not mind sharing the boat. Choose a smaller or private trip if your ideal day includes quiet coves, flexible timing, and plenty of room around you.

FAQ

How long does the Oxygen snorkeling tour last?

The experience lasts about seven hours, including hotel pickup, check-in at Mae Haad Pier, the boat trip, snorkeling stops, and the return transfer.

How much does the tour cost?

The listed price is $27.72 per person. The Koh Nangyuan entrance fee is extra at THB 250 per adult or THB 120 per child.

Is hotel pickup included?

Yes, round-trip hotel transfer is included on Koh Tao, except for hotels in Mango Bay and at Lighthouse Beach.

Are snorkeling equipment and life jackets provided?

Yes. The tour includes a life jacket and basic snorkeling equipment.

Is lunch included?

Yes. A Thai-style lunch is included, along with drinking water, coffee, tea, and fresh fruit. Vegan meals have been available on some departures.

Can children join the tour?

Most people can participate, and children can join. A child taller than 120 centimeters pays the adult Koh Nangyuan entrance fee.

Are morning and afternoon departures available?

Yes. You can choose a morning departure for earlier light or an afternoon departure for a later start.

What happens if the weather is poor?

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