Koh Rong is a place that still holds onto its calm and its raw edge — the kind many of Thailand's popular islands lost a long time ago. More than 7 kilometres of fine, powder-white sand, clear emerald water, and the bioluminescent plankton that glows electric blue under the surface at night are natural gifts you really have to experience for yourself. We'll be honest: the island's infrastructure is still a work in progress, electricity in some spots runs only on set hours, and most of the roads are dirt tracks. But that's exactly the charm nature lovers fall for.
#1 Long Set Beach
The heart of Koh Rong is a white-sand beach that runs unbroken for more than 7 kilometres, one of the longest and most beautiful beaches in Southeast Asia. The sand is fine as powder, and the emerald-blue water is so clear you can see coral on the bottom. The northern end of the beach is quiet and nearly empty. Another special touch: the sand here is high in silica, so it glows faintly in the dark on its own. You will have to walk a bit from your accommodation, though, because the beach is long and there's no transport running the full length.
- You can walk straight from Koh Touch village along the beach — it takes about 30-40 minutes to reach the quieter stretch.
- There are no beach umbrellas for rent on some parts of the beach, so bring enough sunscreen and drinking water.
- The beach gets very dark at night without moonlight, so carry a flashlight for the walk back.
#2 Bioluminescent Plankton Night Swim
This is the natural phenomenon that's the main reason many people come to Koh Rong. Glowing plankton called Noctiluca scintillans release an electric-blue light when disturbed. Walk along the beach in the dark and you'll see the sand shimmer blue under your feet; sweep your hand through the water and you'll see sparks scatter like shooting stars. It happens year-round here, but it's best from November to April, and nights with little moonlight are far clearer. Head out after midnight so the lights from the village interfere as little as possible.
- Don't put on sunscreen or insect spray before getting in the water — the chemicals harm the plankton.
- A new-moon or dark-moon night shows the bioluminescence at its clearest, so check the lunar calendar before you plan.
- Several night kayak tours on the island take you out with a guide for 15-20 dollars per person — safer than going in the water alone.
#3 Koh Rong Samloem
Koh Rong's sister island is quieter and less developed, ideal for anyone who wants to escape the bustle. Saracen Bay curves in a beautiful arc with very clear water, great for snorkelling over coral. Over on the east side, M'pai Bay still keeps the feel of a traditional fishing village. Electricity on the island runs only on set hours (often just from 6pm to midnight) and there's almost no Wi-Fi — a plus for anyone wanting to detox from social media.
- Boats from Koh Rong to Samloem run 1-2 times a day; check the times in advance because the schedule changes with the season.
- Bring enough cash in dollars — Koh Rong Samloem has no ATM.
- Stay at least one night on Samloem to soak up the quiet of the early morning before the first boat of the day leaves.
#4 Koh Touch Village
The hub of life on Koh Rong, bringing the pier, accommodation, restaurants and beach bars together in one place. This is where you'll see the real life of the islanders mixed with a backpacker traveller scene. There's a small morning market with genuinely fresh catch from the sea, fruit vendors with carts, and the sound of boat engines in the early hours. The beach bars stay open late with live music. But this is an ecologically fragile spot, so watch your rubbish and don't throw anything into the sea.
- Explore the village at dawn to watch the locals head out on their boats and see the fresh market before the tourist places open.
- Buy fresh seafood from the locals and have a village restaurant cook it for you — some places will do it for just the cost of labour.
- Electricity in some areas runs only on set hours, so charge your devices fully while the power is on.
#5 Snorkeling and Reef Exploration
The water around Koh Rong is still clean, with reasonably healthy reefs despite growing pressure from tourism. 4K Beach on the east side and Palm Beach on the north have coral and many kinds of tropical fish, with clear water giving visibility of around 5-10 metres — good for snorkelling. Hop-on boat tours from the village take you to several spots with all the gear for around 15-25 dollars per person; choose a tour that focuses on environmental responsibility.
- You can rent snorkelling gear in the village for around 5 dollars a day — check the mask doesn't leak before you head out.
- Avoid standing on or stepping on the coral even when it looks very shallow — coral damages easily and recovers slowly.
- When the water is murky after rain or strong waves, visibility is very poor; wait a day for clear skies before going out.
#6 Jungle Trekking and Waterfall
Koh Rong has lush rainforest covering most of the island, with a cross-island trekking trail from Koh Touch to the beach on the west side that takes about 45-90 minutes. Along the way you pass a small waterfall and hear a dense chorus of birds and insects. The forest is home to long-tailed monkeys, though you rarely spot them. Always go with a local guide, because the trail isn't fully marked and it's easy to get lost.
- Hire a local guide from the village for around 10-15 dollars — it's worth it and helps support the community.
- Wear non-slip shoes that cover your legs; the trail is damp and there may be leeches in the rainy season.
- Carry at least 1.5-2 litres of water per person — the jungle is hot and there are no shops.
Where to stay in Koh Rong for this trip
A well-located hotel means less commuting and more sightseeing. Here are real, top-rated stays in Koh Rong — compare Agoda · Booking · Trip.com in one click.
SunBoo Beach Bungalows
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Song Saa Private Island
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Saracen Bay Resort
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The Royal Sands Koh Rong
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Tours, tickets & activities in Koh Rong
Day tours, attraction tickets and travel essentials for Koh Rong — book ahead on Klook with mobile e-tickets.
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Before You Pack
Koh Rong is at its best from November to April, when the sea is calm and the skies are clear. Avoid the monsoon from May to October, when the waves are strong and the ferries may stop running. Plan to stay 2-3 nights or more so you can take in the full experience — the beaches by day, the bioluminescence late at night, and the quiet of the early morning before the day-tour crowds arrive.