Koh Rong Samloem is a small tropical island off the coast of Sihanoukville in the Gulf of Thailand. It is known for its white sandy beaches, clear turquoise waters, and peaceful atmosphere, making it a popular ecotourism destination with a much quieter feel compared to its livelier neighbor, Koh Rong.
Koh Rong Samloem is mostly covered in forested hills and surrounded by coral reefs and sandy bays. Its coastline features long, curved beaches such as Saracen Bay, along with smaller, quieter coves like Lazy Beach and Sunset Beach. With no major road network, the island has remained largely untouched, helping preserve its natural environment and keeping development low-impact.
Tourism on Koh Rong Samloem is centered around low-impact accommodation such as beach bungalows, eco-resorts, and small guesthouses. Visitors come for snorkeling, scuba diving, kayaking, and the chance to swim at night among glowing bioluminescent plankton. The island’s M’Pai Bay has a small local fishing community and a backpacker-friendly atmosphere, while Saracen Bay offers more comfortable midrange stays.
Koh Rong Samloem is part of Cambodia’s Marine Fisheries Management Area, which was established to protect its coral reefs and seagrass ecosystems. Infrastructure on the island remains limited, with electricity often supplied by generators or solar power and fresh water sourced locally. This slower pace of development has helped encourage more sustainable living practices, in contrast to the rapid urban growth seen on the mainland of Sihanoukville.
Koh Rong Samloem takes its name from Khmer, meaning “far island.” Historically used by fishermen and as a small naval outpost, it has gradually evolved into a symbol of Cambodia’s growing focus on eco-friendly coastal tourism. Travel to the island is strongly influenced by seasonal weather patterns: the dry season from November to May brings calm seas and easier access, while the monsoon season from June to October often reduces ferry services and limits travel.