A place of two faces.
Sihanoukville sits on Cambodia’s southern coast, about 230 km from Phnom Penh, on the Gulf of Thailand. Once a sleepy beach town beloved by backpackers, it has undergone dramatic change over the past decade — and today it is a place of two faces: a rapidly developing port city in the centre, and a still-beautiful coastline of beaches and islands just beyond it.
Otres Beach retains its laid-back charm. Serendipity Beach and Ochheuteal draw a livelier crowd. And offshore, Koh Rong and Koh Rong Sanloem remain among Southeast Asia’s most beautiful undeveloped islands.
What Sihanoukville is
Sihanoukville is on Cambodia’s southern coast on the Gulf of Thailand, about 230 km from Phnom Penh, and is the capital of Preah Sihanouk Province. It is the main coastal city and administrative centre of the province. The urban core includes Serendipity Beach, Ochheuteal Beach, and the commercial centre around Golden Lions Roundabout. Otres Beach lies a few kilometres south.
Sihanoukville — originally named Kampong Som — was developed in the 1950s under King Norodom Sihanouk as Cambodia’s first deep-water port, giving the newly independent country direct access to international trade without relying on Vietnam or Thailand. During the Vietnam War era, the port became strategically important. After 1975, the Khmer Rouge briefly used Sihanoukville before the city fell into decline.
From the late 1990s and especially the 2000s, Sihanoukville became a beloved stop on the Southeast Asia backpacker trail. Since around 2016, Sihanoukville has undergone rapid, sometimes controversial development, driven largely by Chinese investment in casinos, hotels, and infrastructure. Today, Sihanoukville is best understood as a developing port and resort city where travelers choose their experience carefully.
Highlights of Sihanoukville
From the relaxed sands of Otres to the lively central beaches and the island escapes offshore, these are the places that define Sihanoukville.
Otres is the most relaxed of Sihanoukville’s town beaches — a long, tree-lined stretch of sand with low-key guesthouses, beach bars, and restaurants. It has retained more of its original backpacker atmosphere than the central beaches, and remains a favourite for travelers who want sun, sea, and a slower pace.
Serendipity Beach The Social HeartSerendipity is the social heart of Sihanoukville’s coastline — a busy strip of bars, restaurants, and small hotels, popular for sunset drinks and evening seafood. It connects to Ochheuteal Beach, which offers a long stretch of sand with a similar mix of dining and nightlife.
Koh Rong Cambodia’s Best-Known IslandKoh Rong is a large, mostly undeveloped landmass with white-sand beaches, clear water, and a lively backpacker scene around Koh Tuch village. Long Set Beach offers a quieter alternative, and night swimming with bioluminescent plankton is a memorable experience.
Koh Rong Sanloem The Quieter SisterKoh Rong Sanloem is Koh Rong’s quieter neighbour, popular with honeymooners, divers, and travelers seeking calm. Saracen Bay is the main beach, with a growing cluster of small resorts and guesthouses. Lazy Beach and Sunset Beach offer quieter alternatives.
Ochheuteal Beach The Longest Central BeachOchheuteal is Sihanoukville’s longest central beach, with a row of seafood shacks, beach bars, and water sports operators along its length. It is family-friendly in the daytime and lively after dark.
Ream National Park Wild CoastReam National Park offers a wilder side of Cambodia’s coast — mangroves, beaches, and forest just 20 km from Sihanoukville. The park encompasses 21,000 hectares of mangrove forests, coastal beaches, coral reefs, and evergreen forest. Boat trips through the mangrove channels are a popular way to see the park.
Best time to visit Sihanoukville
Sihanoukville is warm year-round, but the coastal seasons are more pronounced than elsewhere in Cambodia. The dry season from November to March is the best time for beach days and island trips.
Clear skies, calm seas, and comfortable temperatures. The best time for beach days, island trips, and diving. This is the peak season, so book accommodation and ferries in advance.
Hot and humid, but with calm seas and fewer crowds. Beach time is best in the morning and late afternoon. A good time for those who don’t mind the heat.
Heavy afternoon rains, rougher seas, and lush scenery. Ferries to the islands can be cancelled in rough seas. Lower prices and quieter beaches. Build flexibility into island plans.
Sihanoukville is a year-round destination. The city’s beaches, markets, and national park are open throughout the year. The Sea Festival usually rotates between coastal provinces in December.
Practical information
Getting there & around
By air: Sihanouk International Airport (KOS) is about 18 km from the town centre and receives a limited number of domestic and regional flights. Most international travelers arrive via Phnom Penh or Siem Reap and continue overland. By road: From Phnom Penh (2.5–3 hours via the expressway), from Kampot (2–2.5 hours), from Kep (about 2 hours), from Koh Kong / Thai border (4–5 hours).
Ferries and speedboats connect Sihanoukville Port with Koh Rong and Koh Rong Sanloem multiple times daily. Journey times range from about 45 minutes to 1 hour 30 minutes depending on the operator and destination.
Good to know
- — Beachwear is fine on the sand; cover shoulders and knees in town and at temples
- — Swim where lifeguards are present; be aware of strong currents during the green season
- — Use reef-safe sun protection when swimming near coral
- — US dollars and Cambodian riel are both used; small bills are essential
- — Check ferry schedules and sea conditions before booking island trips in the green season
Other places nearby
Sihanoukville sits on the Gulf of Thailand, within easy reach of the rest of Coastal Cambodia and Phnom Penh.
Coastal Cambodia
The Gulf of Thailand coast — Sihanoukville, Koh Rong, Kampot, Kep, and Ream National Park.
Explore Coastal Cambodia → Island · Gulf of ThailandKoh Rong
Cambodia’s best-known island — white sand, clear water, and a lively backpacker scene.
Explore Koh Rong → Town · Kampot ProvinceKampot
The riverside town known for its world-famous pepper and colonial charm, 2–2.5 hours west.
Explore Kampot → Town · Kep ProvinceKep
The quiet coastal town with the famous Crab Market and Rabbit Island, about 2 hours away.
Explore Kep →Questions About Sihanoukville
Where is Sihanoukville?
Sihanoukville is on Cambodia’s southern coast, about 230 km from Phnom Penh, on the Gulf of Thailand. It is the capital of Preah Sihanouk Province.
What is Sihanoukville famous for?
Sihanoukville is famous for its beaches including Otres Beach and Serendipity Beach, its nearby islands Koh Rong and Koh Rong Sanloem, fresh seafood, and as the gateway to Cambodia’s southern coast.
How many days do you need in Sihanoukville?
Two to three full days is ideal for most visitors. Two days covers the town beaches and a day trip to Ream National Park. Three days allows an island escape to Koh Rong or Koh Rong Sanloem.
Is Sihanoukville worth visiting?
Yes, with the right expectations. Sihanoukville’s town beaches have changed dramatically due to development, but Otres Beach and the nearby islands of Koh Rong and Koh Rong Sanloem remain beautiful, laid-back coastal escapes.
What are the best things to do in Sihanoukville?
Relax on Otres Beach, explore Serendipity Beach, take a boat to Koh Rong or Koh Rong Sanloem, visit Ream National Park, enjoy fresh seafood, and take a sunset cruise.
What is the best time to visit Sihanoukville?
November to March offers the best beach weather with clear skies and calm seas. The green season from May to October brings occasional heavy rain but also greener scenery and lower prices.
How do you get to Sihanoukville?
Sihanoukville is reached by the Phnom Penh–Sihanoukville Expressway (2.5–3 hours by car or bus), by air via Sihanouk International Airport, or by ferry to the islands from Sihanoukville’s port.
Can Sihanoukville be combined with Phnom Penh?
Yes. The Phnom Penh–Sihanoukville Expressway makes the journey fast and comfortable at 2.5–3 hours. Most travelers combine Sihanoukville with Phnom Penh, Kep, and Kampot on a southern Cambodia itinerary.
Discover Cambodia’s coastal gateway.
Sihanoukville works best as a 2–4 day journey — the town beaches, an island escape, and a day trip to Ream National Park. Our specialists can arrange transport, ferries, hotels, and an itinerary that suits your pace.
Start Planning →Cambodia coastal expertise, on the ground.
If you are building Cambodia programs that include Sihanoukville or the Gulf of Thailand, we can support you with local DMC services, vetted hotel partners, and confidential trade rates across the region.
Visit the Trade Page →Cambodia’s premier coastal gateway.
From the laid-back sands of Otres Beach to the island escapes of Koh Rong and Koh Rong Sanloem, Sihanoukville is the gateway to Cambodia’s southern coast — a place of two faces, where travelers choose their experience carefully.