Koh Rong 3-day itinerary

Take the morning speed ferry from Sihanoukville to Koh Rong — the journey takes 45 minutes across the Gulf of Thailand. Ferries arrive at Koh Toch village, the island's small tourist hub with guesthouses, restaurants, and dive shops. From the pier, take a boat taxi or walk the jungle trail to Long Set Beach on the west coast. This 7-kilometre sweep of white sand is one of Cambodia's finest beaches — utterly unspoiled, backed by thick jungle, and with water so clear you can see fish swimming from the shore. Drop your bag at a beach bungalow and spend the morning swimming and exploring.

The southern end of Long Set Beach has a rocky reef that offers the best shore-accessible snorkelling on the island. Rent a mask and fins from your bungalow or beach bar (about $5 per day) and swim out to the rocks where you will find hard and soft coral, lionfish, pufferfish, and schools of damselfish and wrasse. The visibility is excellent during the dry season — 10 to 15 metres is common. Further along the coast, the reef becomes deeper with larger formations and more diverse marine life. If you are a confident swimmer, the rocks at the far southern headland have the healthiest coral.

After dinner at one of the simple beach restaurants, wait for full darkness and head to the waterline for Koh Rong's most magical experience — bioluminescent plankton. On dark nights, the water glows electric blue with every disturbance. Wade in and sweep your arms through the water to create swirling trails of blue light, or swim further out where each stroke leaves a glowing wake behind you. It is caused by dinoflagellates — single-celled organisms that emit light as a defence mechanism. The effect is strongest between October and May on moonless nights.

Join a morning dive or snorkel trip with one of the island's dive operators — Dive Shop Koh Rong and The Dive Shop are both reputable outfits based at Koh Toch. The island has several excellent dive sites including Japanese Garden (a coral-covered slope with seahorses and nudibranchs), Six Senses (named after the luxury resort nearby), and the deeper offshore reefs where barracuda, rays, and occasional whale sharks have been spotted. A two-dive trip costs about $65-80 for certified divers. Discover scuba dives for beginners are available for around $80.

After returning from the dive, hike the cross-island jungle trail from the main pier area to Sok San village on the east coast. The trail winds through dense tropical forest alive with the sounds of cicadas, birds, and rustling undergrowth — macaques are commonly seen swinging through the canopy. Sok San is a traditional Khmer fishing village where life has changed little in generations: wooden stilt houses, nets drying on the shore, and children playing in the shallows. Visit the village temple and school, buy a cold drink from the tiny shop, and sit on the dock watching the fishing boats return.

Return to Koh Toch village — the island's small but lively tourist hub where backpackers, divers, and expats gather at the waterfront bars. The nightlife is unpretentious and social: cheap beers ($1-2), hammocks on the sand, fire shows, and music that ranges from reggae to techno depending on the bar. The Nest Beach Club and Skybar at Police Beach are the main party spots, while smaller beach bars offer a more chilled atmosphere. Grab dinner at one of the Khmer restaurants — amok (coconut fish curry), lok lak (stir-fried beef), and fried rice are all excellent and cost $3-5.

Walk or take a short boat taxi to Police Beach — a small, photogenic bay south of Koh Toch named after a police outpost that once stood here. The beach is sheltered by jungle-covered headlands and has some of the clearest water on the island — excellent for snorkelling directly from the shore. From Police Beach, follow the rocky coastal path south to discover a series of tiny hidden coves that are completely empty on most days. Each pocket beach is more beautiful than the last, with white sand, overhanging tropical trees, and water that shimmers between turquoise and emerald.

Rent a kayak from one of the beach bungalow operations and paddle along the west coast of Koh Rong. The coastline is spectacular from the water — towering jungle, rocky headlands, and small sandy coves only accessible by boat. Paddle north from Long Set Beach and you will find completely deserted stretches of sand where you can pull up and have a private beach entirely to yourself. The water is calm in the dry season and the kayaking is easy. Keep your eyes open for sea eagles soaring above the treeline and occasionally dolphins playing offshore in the deeper water.

Spend your final hours on Koh Rong at your favourite beach spot, watching the sun set over the Gulf of Thailand. The west coast beaches face directly into the sunset and the sky turns spectacular shades of orange and purple as the sun drops below the horizon. Grab a final amok curry and cold Angkor beer at a beachside restaurant before catching the evening ferry back to Sihanoukville. Koh Rong is one of those rare places that still feels genuinely undiscovered — savour the peace and simplicity before returning to the mainland.