Koh Nang Yuan is not on Koh Samui and there is no bridge or road to it. It sits roughly 65 kilometres north of Koh Samui in the Gulf of Thailand, right beside Koh Tao, and every visitor arrives by boat. From Koh Samui the practical way is a full-day speedboat trip: the crossing takes about 90 minutes to 2 hours in normal sea conditions, and the same trip usually snorkels Koh Tao's reefs on the same day. Expect hotel pickup between 07:30 and 08:30, departure around 09:00, and drop-off back at your hotel between 17:00 and 18:00.
Where Koh Nang Yuan actually is
Koh Nang Yuan is a tiny private island next to Koh Tao (Thai: เกาะเต่า), in Surat Thani Province, Thailand. It is famous for one thing: a triple sandbar linking three rocky islets, with a short hilltop trail to the viewpoint that appears on most postcards of the Gulf of Thailand.
The distance that matters for planning is Koh Samui to Koh Tao: approximately 65 km north, at roughly 10.0956°N, 99.8403°E. Koh Nang Yuan sits right beside it. That is a real open-sea crossing, not a short hop, which is why day trips leave early and return late.
The two ways to get there from Koh Samui
Both options are boats. The difference is whether you share one.
| Option | Price | Crossing | Day length |
|---|---|---|---|
| Join-in speedboat day trip | from ฿1,900 per adult / ฿1,650 per child (infants free) | about 90 min–2 h | pickup 07:30–08:30, back 17:00–18:00 |
| Private speedboat charter | from ฿39,750 per boat (1–8 guests); ฿46,750 (9–15); ฿56,750 (16–25) | about 90 min | departs 09:00, back 16:30–17:00 |
Read the units carefully, because this is where people miscalculate. The join-in trip is priced per person. The charter is priced per boat for the whole group, not per passenger.
The Koh Tao and Koh Nang Yuan snorkeling day trip from Koh Samui is the standard choice: hotel pickup and drop-off by air-conditioned minivan, a shared speedboat, a light breakfast or snack at the pier before departure, at least two snorkeling sessions, a Thai lunch at a restaurant on Koh Tao, and mask, snorkel and life jacket for everyone.
The private speedboat charter to Koh Tao and Koh Nang Yuan covers the same two islands with the boat reserved for your group only, and lets the captain pick the bays and the order of stops. Two things differ from the join-in trip: hotel transfer on Samui is not included in the charter price (it can be added for a fee, or you can make your own way to the meeting point), and lunch on Koh Tao is chosen and paid directly at a beach restaurant rather than being part of the package.
What the day actually looks like
On the join-in trip, pickup is between 07:30 and 08:30 depending on where you are staying, and the speedboat leaves at around 09:00 after check-in and a safety briefing. The crossing to the first island takes roughly 90 minutes in normal conditions.
Koh Nang Yuan comes first: free time on the sandbar, shallow water to swim in, and the option to walk up to the viewpoint. That climb takes about 15 minutes and the trail is steep in parts, with steps and rocks — wear something with grip, not flip-flops.
Snorkeling happens at Koh Tao's reef spots, typically sites such as Mango Bay or the Japanese Garden, with lunch on Koh Tao before or between the stops. The guide chooses the sites on the day based on visibility and safety, so the order is not fixed. The boat is back near Koh Samui around 16:30–17:00, with hotel drop-offs finishing between 17:00 and 18:00.
The island fee people forget to budget for
Koh Nang Yuan charges its own entrance fee and it is not included in the tour price: 250 THB per adult and 120 THB per child, paid in cash on arrival. Locker rental on the island is also extra. Bring small Thai baht notes — this is not something you can settle in advance with us.
The island also enforces its own rules. No plastic bottles are allowed ashore, smoking is limited to set zones, and there are marked paths to the viewpoint. On some visits fins are restricted to protect the coral. Follow the signage and the staff on the island; those rules are theirs, not ours.
What is included, and what is not
On the join-in day trip the price covers round-trip hotel transfers by air-conditioned minivan, the shared speedboat, a light breakfast or snack at the pier, a Thai lunch on Koh Tao, drinking water and soft drinks on board, mask, snorkel and life jacket, at least two snorkeling sessions, an English-speaking guide and basic accident insurance.
Not included: the Koh Nang Yuan entrance fee, locker rental, alcoholic drinks, souvenirs, tips, and towels — bring your own.
Who should think twice
This is a long day on open water. Speedboat trips of this length are not recommended for pregnant guests or anyone with serious back or neck problems, because the boat can slam in choppy seas. Fitness needs to be moderate: you will walk on sand, climb steps and rocks to the viewpoint, and get in and out of the boat by ladder. Anyone who dislikes choppy seas will have a better day closer to shore.
If that sounds like your group, the islands 4 km off Koh Samui's south coast are the sensible swap. The Pig Island and Koh Tan snorkeling speedboat trip runs 5–6 hours from ฿1,350 per adult and ฿1,150 per child, and the calmer VIP longtail boat trip to Pig Island and Koh Tan is a half-day from ฿1,650 per adult and ฿1,400 per child, with pickup 08:00–08:45 and return 14:00–15:00.
If you want a full day out but prefer limestone scenery to reefs, the Ang Thong Marine Park VIP speedboat tour is from ฿1,850 per adult and ฿1,500 per child.
Frequently asked questions
How do you get from Koh Samui to Koh Nang Yuan?
By boat only. Koh Nang Yuan lies about 65 kilometres north of Koh Samui, beside Koh Tao, and has no bridge or road link. From Koh Samui the practical option is a full-day speedboat trip that visits both Koh Nang Yuan and Koh Tao, with hotel pickup between 07:30 and 08:30, departure around 09:00, and hotel drop-off between 17:00 and 18:00. You can either join a shared speedboat or charter one privately for your group.
How long does it take to get from Koh Samui to Koh Nang Yuan?
Approximately 1.5 to 2 hours each way by speedboat, with the crossing to the first island taking around 90 minutes in normal sea conditions. The distance is roughly 65 kilometres across open water in the Gulf of Thailand, so the actual time varies with the sea state on the day.
How much does a day trip from Koh Samui to Koh Nang Yuan cost?
The shared speedboat day trip to Koh Tao and Koh Nang Yuan is from 1,900 THB per adult and 1,650 THB per child, with infants free. A private speedboat charter for the whole group is from 39,750 THB per boat for 1 to 8 guests, 46,750 THB for 9 to 15 and 56,750 THB for 16 to 25 — that is a per-boat price, not per person. The Koh Nang Yuan island entrance fee of 250 THB per adult and 120 THB per child is separate and paid in cash on arrival.
Is there an entrance fee for Koh Nang Yuan?
Yes. Koh Nang Yuan charges 250 THB per adult and 120 THB per child, paid in cash on arrival at the island. It is not included in the tour price. Locker rental on the island is also charged separately, so bring small Thai baht notes.
Can you visit Koh Nang Yuan without going to Koh Tao?
In practice, no — not on a day trip from Koh Samui. Koh Nang Yuan sits directly off Koh Tao, and the boat trips that run from Koh Samui cover both islands on the same day: time on the Koh Nang Yuan sandbar and viewpoint, plus at least two snorkeling stops at Koh Tao's reefs with lunch on Koh Tao.
How hard is the Koh Nang Yuan viewpoint hike?
It takes around 15 minutes to walk up. The trail is steep in parts with steps and rocks, so wear light shoes or sandals with grip rather than flip-flops. It is optional — you can skip it and stay on the sandbar. Overall the day needs a moderate fitness level, including boarding the boat by ladder.
