🔄 Updated 21 Jun 2026
The appeal of Koh Samet is that it's easy to reach and the sea really is lovely. The east-coast beaches like Sai Kaew, Ao Phai and Ao Wong Duean are fine white sand you can walk between, while the west side has Ao Phrao, which is quieter with the best sunsets. The island sits inside Khao Laem Ya–Mu Ko Samet National Park, so there's a fee checkpoint before you go in. This 3-day, 2-night plan keeps the first day relaxed for arrival, a full-day snorkeling boat loop on day two, and the viewpoint walk on day three before heading home.
Before you go — boat fares, park fees, what to prep
- Getting to Ban Phe — minivans from Ekkamai run all day, around ฿200–250 each way, taking roughly 3–4 hours to Ban Phe pier.
- Crossing to the island — the Ban Phe–Na Dan (Sai Kaew Beach) passenger ferry is around ฿100 round trip and takes about 40 minutes. First boat at 8:00 a.m., last around 6:00 p.m.
- Speedboat — a charter runs roughly ฿1,500–2,600 per trip depending on boat size and group, faster and available anytime. Worth it for larger groups or late arrivals.
- National park fee — ฿40 for Thai adults, ฿20 for children (฿200 for foreign adults), collected at the checkpoint on the island. Keep the receipt in case you're checked again.
- Cash — ATMs on the island are few and lines are long, so withdraw enough on the Ban Phe side before you cross.
Booking your stay
Places near Sai Kaew Beach are lively and close to the pier, so they're easy to reach, but it gets noisy at night. If you want quiet, pick the Ao Wong Duean or Ao Phrao side instead. Rooms fill fast on weekends and long holidays, so book ahead.
Book the activities in your Rayong trip ahead
Booking online ahead on Klook or GetYourGuide is usually cheaper than the gate and skips the queue. Pick only the experiences you actually want — prices and availability are shown live on each site.
Day 1 — Arrive and hit Sai Kaew Beach
Arrive, save your energy for a cool swim
Day 2 — Full-day snorkeling boat loop
The highlight of this plan is day two: a boat around Koh Samet and the small nearby islands to snorkel over shallow coral. Popular trips come in half-day and full-day versions, stopping at several spots to swim, see coral, and pull up on a quiet beach for lunch.
Island boat loop + snorkeling
About the tides
Underwater visibility depends on the weather and currents — some days are murkier than usual. Ask the boatman where the water's clear that day, and don't expect Andaman-clear water every time. Honestly, Koh Samet is more about its sandy beaches than its reefs.
Day 3 — Khao Laem Ya viewpoint before heading home
Catch the view, grab souvenirs, head back
Pick the beach that fits your style
Sai Kaew Beach
The popular beach on the north side: fine white sand, shallow easy water, busy all day, with plenty of restaurants and watersports. Good for friends and families who want convenience.
Ao Wong Duean
A crescent-shaped bay on the east side with pretty sand, resorts and restaurants, a touch quieter than Sai Kaew. Good for couples or anyone wanting a more laid-back vibe than the main beach.
Ao Phrao
On the west side: quiet, private, and the best sunset spot on the island. Good for getting away from the crowds.
Ao Kiu & Ao Thapthim
Small bays on the south side with clear water, shallow coral and few people. Good for a snorkel stop on the island boat loop.
Rough budget per person (2 nights)
- Round-trip transport (minivan) — around ฿400–500
- Round-trip island ferry — around ฿100 (passenger ferry), or split a speedboat charter
- National park fee — ฿40 (Thai adult)
- Island snorkeling tour — around ฿400–800 depending on half-day/full-day and number of stops
- 2 nights' lodging — from a few hundred up to a few thousand THB per night, depending on the beach and season
- Food — beachfront seafood runs a few hundred per meal, budget ฿400–700 a day
The best time to go
Koh Samet is good almost year-round since it's on the Gulf side and gets less rain than many islands. The clearest water and calmest seas tend to run roughly November through April. Skip the long holidays unless you don't mind crowds and pricier rooms.
Want a full Rayong plan — islands, beaches and food
See the Rayong travel guide →