“Swim off Koh Rong after dark and the water glows blue around you - bioluminescent plankton lighting up Cambodia's biggest island beaches.”
About Koh Rong
Long a quiet fishing island, Koh Rong opened to tourism relatively recently as Cambodia's coast developed, growing from a backpacker secret into a spread of beaches, bungalows and dive operations. Development has been uneven and at times controversial, but much of the island and neighbouring Koh Rong Sanloem remains forested and low-rise.
Overview Koh Rong is the largest of the islands off Sihanoukville on Cambodia's south coast, fringed with long white-sand beaches and warm, clear water. It ranges from lively backpacker beaches to quiet bays reachable only by boat or jungle trail, and after dark its waters can light up with bioluminescent plankton that glow blue when disturbed.
Overview Koh Rong is the largest of the islands off Sihanoukville on Cambodia's south coast, fringed with long white-sand beaches and warm, clear water.
Two Islands Neighbouring Koh Rong Sanloem is calmer and more low-key. Together they offer the classic Cambodian beach escape, from party hostels to remote bungalows, with snorkelling, swimming and night swims in the glowing sea.
The Experience
Ferries from Sihanoukville reach the main beaches in well under an hour, where you find soft white sand and bathwater-warm sea. You can hike or boat to emptier bays, snorkel the reefs, and on dark nights wade in to see the plankton glow at every movement. The vibe shifts sharply from busy party beaches to near-deserted coves.
Why It Matters
Koh Rong is Cambodia's flagship island destination and the country's best-known beach escape, valued for its white sand, clear water and the bioluminescence that draws night swimmers.
Koh Rong is Cambodia's flagship island destination and the country's best-known beach escape, valued for its white sand, clear water and the bioluminescence that draws night swimmers.
Why Visit
It is the easiest way to add tropical beaches to a Cambodia trip heavy on temples and history. Pick your beach to match the mood you want, from party to solitude, and time a night swim for a dark, moonless evening to see the plankton.
✦ Insider Tips
- 1
Choose your beach carefully; they range from party hostels to remote, quiet bungalows.
- 2
For the brightest bioluminescence, swim on a dark, moonless night away from beach lights.
- 3
Neighbouring Koh Rong Sanloem is calmer if you want a quieter stay.
- 4
Bring enough cash; ATMs are scarce and unreliable on the islands.
