Similan Islands National Park is a marine and island park in the Andaman Sea, renowned for crystal-clear waters, vibrant coral reefs, and exceptional scuba diving and snorkeling opportunities.
Similan Islands National Park is located in the Andaman Sea off the coast of Phang Nga Province in southern Thailand. Established in 1982, the park protects nine main islands and several smaller islets, covering both terrestrial and marine environments. The islands feature white sandy beaches, granite rock formations, and lush tropical forests. The underwater ecosystem is among the most diverse in the region, hosting vibrant coral reefs, sea fans, and an abundance of marine life such as manta rays, whale sharks, reef sharks, moray eels, and sea turtles. The area has become a world-renowned destination for scuba divers and snorkelers seeking clear water visibility and rich biodiversity. Visitors can also explore coastal trails, relax on pristine beaches, or enjoy boat tours around the islands. The park is managed with conservation as a priority, limiting visitor numbers during monsoon season to protect fragile coral systems. The islands hold cultural significance to local communities and are part of ongoing efforts to balance tourism with environmental preservation. The park’s most famous landmarks include Elephant Head Rock and the famous diving site at Koh Bon. Its appeal lies in the combination of spectacular marine adventures and breathtaking island scenery, making it a premier destination for outdoor enthusiasts and nature lovers.
Elephant Head Rock – iconic granite formation rising from the sea
Diving at Koh Bon – known for manta ray sightings and abundant marine life
Clear water snorkeling around Koh Similan's coral gardens
Thap Lamu Bay viewpoints offering panoramic island views
Massive sculpted granite boulders shape the landscape of the islands and create unique coastal rock formations.
Extensive reefs support a wide variety of hard and soft corals, providing habitat for diverse marine species.
The park is a hotspot for marine species, including manta rays, whale sharks, and numerous fish species.