When winter’s chill becomes too much to bear, and the allure of sun-kissed beaches and sparkling-blue waters becomes irresistible, it’s time to escape to Thailand — specifically the Similan Islands. Located in the Andaman Sea, about 52 miles off the northwest coast of Phuket, these islands are a paradise for beach lovers, divers, and those seeking a tranquil retreat in the warm embrace of Southeast Asia.
The Similan Islands are an archipelago consisting of 11 islands, although originally, it was known for being nine. The Malayan word “sembilan” means “nine islands,” which is where the name Similan originates. The 11 named and numbered islands are part of Similan Islands National Park, established in 1982. This status, protected by Thai law, helps preserve the area’s ecological balance and marine life.
These islands are much less commercialized compared to other Thai beach destinations, offering a more serene and unspoiled experience. The best time to visit is between December and April, aligning perfectly for those seeking to escape the winter blues. During this time, the water is exceptionally clear and calm, with temperatures of about 82 degrees Fahrenheit.
The Similan Islands boast some of the most beautiful beaches in Asia, if not the world. White sandy shores, often compared to powdered sugar for their fine and soft texture, meet the emerald and turquoise hues of the sea. Each island offers its own unique beach experience, from the secluded underwater caves of Island 4 (Koh Miang) to the longest stretch of sand on Island 1 (Koh Huyong).
Underwater adventures at the Similan Islands
The clear waters are a world-class underwater marvel. You’ll see over 200 types of coral, a plethora of fish species, manta rays, sea turtles, and even whale sharks. Dive sites like Elephant Head Rock (Island 7: Koh Hin Pousar) and Christmas Point (Island 9: Koh Bangu) are top-rated, offering breathtaking dives. Anita’s Reef is another must-visit diving spot, located on Island 5 (Koh Ha). Depths around the islands range from 100 and 150 feet to 230 and 260 feet, with excellent visibility.
Exploring the Similans is best done by island hopping, as each one offers unique landscapes, beaches, and snorkeling spots. Charter a boat or join a guided tour, like one from Phuket Tours Direct or Get Your Guide. Island 8 (Koh Similan) features trails leading to 800-foot-high viewpoints, while Island 2 (Koh Payang) has rocky cliff formations to explore. Ironwood, gum trees, and jackfruit are some of the flora you may encounter on such hikes, as well as wildlife like dusky langurs, crab-eating monkeys, and around 120 bird species.
Formed 100-150 million years ago from magma and sculpted by tectonic shifts and changing sea levels, the Similan’s geology is marked by dramatic shifts. These islands have been submerged, endured storms, and hosted now-extinct wildlife. More recently, a 2004 tsunami and a 2010 Indian Ocean Dipole event caused significant damage, destroying delicate ecosystems and killing almost 90% of coral life. However, nature’s resilience and conservation efforts by the Thai government are helping the islands recover.
Travel tips for the Similan Islands
Staying overnight at the Similan Islands is, unfortunately, not an option. It used to be, but it’s now forbidden in order to limit visitor numbers and the environmental impact of tourism. The park operates from 8 a.m. to 4 p.m., after which everyone must return to the mainland. Khao Lak is the nearest town (and boat/tour departure point), which offers plenty of accommodation options.
Tourism in the Similans is strictly regulated to protect its fragile ecosystems, and everyone should help this conservation by adhering to the park’s guidelines. Visitor numbers are controlled at a maximum of 3,325 people per day, and foreigners must pay an entry fee of 500 bhat (about $15). The park is only open from October 15 to May 15 every year.
One of the biggest draws of the Similan Islands is the opportunity to escape the crowds that often flock to more popular beach destinations. There is only one restaurant, two visitor information centers, and one souvenir shop in the entire Mu Ko Similan National Park — it truly is an untouched slice of paradise.
Reaching the Similan Islands involves a flight to Phuket and a bus to Khao Lak, followed by a boat trip to the islands, which is usually included in an organized tour. This waterborne journey is a fun part of the adventure, taking you from bustling tourist centers to the tranquil and pristine Andaman Sea. It’s one of the best places to visit in Thailand, so don’t miss out!
