Preah Sihanouk

Preah Sihanouk is Cambodia's premier coastal province, stretching along the Gulf of Thailand in the country's south. Named after the late King Father Norodom Sihanouk, the province encompasses the bustling port city of Sihanoukville, a string of white-sand beaches, and a scattering of tropical islands that have made it one of Southeast Asia's fastest-growing seaside destinations. Mangrove-fringed coastline, coral reefs, and pockets of lowland rainforest define the landscape, while rapid urban development — particularly around the Sihanoukville core — has transformed the once-sleepy fishing town into a hub of construction, casinos, and tourism infrastructure.

Beyond the city, the province retains pockets of tranquility. Ream National Park protects coastal forests and wetlands just east of Sihanoukville, while offshore islands such as Koh Rong and Koh Rong Samloem offer backpacker-friendly beaches and increasingly upscale resorts. The southern stretches around Kampong Seila and Prey Nob remain largely rural, with fishing villages and cashew plantations dotting the low hills.

For travelers, Preah Sihanouk serves as both a beach destination in its own right and a jumping-off point for island-hopping, diving, and snorkeling. The province's identity is inseparable from the sea — seafood is omnipresent, fishing boats line every harbor, and the rhythm of life follows the tides.

The best time to visit is during the dry season from November to April, when skies are clear, humidity drops, and sea conditions are calm enough for island transfers and diving. December through February offers the most comfortable temperatures, typically 25–30°C. The Khmer New Year period (mid-April) brings festive energy to Sihanoukville's beaches, though accommodation prices spike and the city fills with domestic tourists.

The rainy season (May–October) brings heavy afternoon downpours, rough seas, and occasional ferry cancellations to the islands. However, the landscape turns lush green, beaches are emptier, and prices drop significantly. Ream National Park is especially beautiful during this period. Note that the Water Festival (Bon Om Touk, usually November) is celebrated nationally but draws crowds to Phnom Penh rather than the coast.

Sihanoukville is connected to Phnom Penh by National Road 4 (approximately 230 km, 4–5 hours by bus or shared taxi). Frequent bus services depart from Phnom Penh's Central Market area, with several companies offering air-conditioned coaches. The Sihanoukville–Phnom Penh railway has resumed limited passenger service, offering a scenic but slower alternative.

Within the province, tuk-tuks and motorbike taxis are the main local transport in Sihanoukville city. For longer trips to Ream, Prey Nob, or Kampong Seila, shared taxis or hired motorbikes are practical. Speed ferries and boat services connect the Sihanoukville port (Serendipity Beach pier and the new deepwater port) to Koh Rong (45 minutes) and Koh Rong Samloem (1 hour). Multiple operators run daily services; during rough seas in monsoon months, schedules are unreliable.

• Sihanoukville — The provincial capital and Cambodia's main beach resort city, with Ochheuteal, Serendipity, and Otres beaches; a busy port; and a growing skyline of hotels and casinos.
• Veal Renh — A small coastal commune between Sihanoukville and Ream, offering quieter beaches and a gateway to the national park.
• Prey Nob — A rural district in the province's interior with fishing villages, mangrove-lined rivers, and a glimpse of traditional Cambodian coastal life away from tourist zones.
• Stueng Hav — A coastal area north of Sihanoukville known for its seafood markets and less-developed beaches.
• Kampong Seila — A southern district with cashew farms, quiet coastline, and access to some of the province's most untouched stretches of shore.
• Koh Rong — Cambodia's second-largest island, famous for its long white-sand beaches, bioluminescent plankton, and a mix of backpacker hostels and boutique resorts.
• Koh Rong Samloem — A quieter, more pristine alternative to Koh Rong, with clear turquoise waters, coral reefs, and a laid-back atmosphere geared toward relaxation and snorkeling.
• Koh Thmei — A largely undeveloped island within Ream National Park, offering birdwatching, mangrove kayaking, and a rare sense of isolation.
• Ream National Park — A 210-sq-km protected area east of Sihanoukville encompassing coastal forest, mangroves, and offshore islands; home to monkeys, hornbills, and dolphin sightings.

Seafood dominates the culinary landscape. Grilled squid, steamed crab, and pepper crab are staples at beachfront shacks and the Sihanoukville seafood market near Ochheuteal. Cambodian classics such as amok (steamed fish curry in banana leaf) and lok lak (stir-fried beef with pepper-lime dipping sauce) are available everywhere. The province's coastal location means fish sauce and dried fish feature prominently in local cooking.

Street food vendors along Serendipity and Occheteaul beaches serve skewers, fried noodles, and fresh fruit shakes. The Psar Leu (central market) in Sihanoukville is the best place for budget meals — look for kuy teav (noodle soup) for breakfast and bai sach chrouk (pork and rice) in the morning hours. International restaurants catering to tourists cluster near the beach areas, offering everything from pizza to Israeli cuisine. On the islands, dining options are simpler — most resorts serve Khmer and basic Western food, and fresh seafood barbecues on the beach are a highlight of Koh Rong evenings.

Preah Sihanouk's culture is shaped by its maritime heritage. Fishing communities maintain traditions of boat-building, net-weaving, and spirit-house offerings to ensure safe voyages. The Wat Leu temple complex on a hilltop in Sihanoukville city is the province's most significant religious site, offering panoramic views and hosting ceremonies during major Buddhist holidays.

Khmer New Year (Chaul Chnam Thmey, mid-April) is the biggest local celebration, with beach parties, sand stupas built on the sand, and traditional games. The Water Festival (Bon Om Touk, November) marks the reversal of the Tonle Sap current and is celebrated with boat races in smaller waterways. Pchum Ben (September/October), the festival of the dead, sees Cambodians return to their home provinces to make offerings at pagodas — Sihanoukville quiets noticeably during this period. The province has a growing live music and nightlife scene, particularly along the Ochheuteal–Serendipity strip, reflecting the influx of both international visitors and Cambodian domestic tourists.

• Bioluminescent plankton night swim at Koh Rong — On moonless nights, the waters around Koh Rong light up with bioluminescent plankton, creating an ethereal swimming experience best accessed by longtail boat from the main beach.
• Island-hopping by speedboat — A day trip connecting Koh Rong, Koh Rong Samloem, and Koh Thmei offers snorkeling over coral reefs, beach time, and a taste of Cambodia's island diversity without needing to commit to overnight stays.
• Ream National Park mangrove and dolphin boat tour — Guided boat trips through the park's mangrove channels and along the coast, with chances to spot Irrawaddy dolphins, macaques, and hornbills in their natural habitat.
• Sunset at Otres Beach — Otres, the more bohemian stretch south of Ochheuteal, is known for its relaxed beach bars, live music at sunset, and a community of artists and long-term travelers.
• Sihanoukville seafood market crawl — An evening walk through the waterfront markets selecting your own fresh crab, prawns, and fish to be grilled on the spot, paired with cold Angkor beer and a Gulf of Thailand sunset.