Ko Ngam Yai is a towering limestone island without a beach, making it inaccessible to visitors for landing because part of the island is under a swiftlet nest concession. Tourists are therefore limited to activities around the island.

The true wonder of Ko Ngam Yai lies underwater, where it is considered one of the best diving spots in Chumphon. The waters here are rich with marine biodiversity. Unlike the Andaman Sea, the visibility may be less, but the black coral and soft corals are abundant and rare, attracting divers from all over the world. The surrounding waters are home to a variety of fish, including grouper, elephant ear fish, moray eels, clownfish, and giant giant clams.

On the island itself, there are significant cultural and natural landmarks. Landmark Rock (Hin Lak Ngam) is a large rock historically used by local fishermen as a navigation reference for entering Pak Nam Chumphon. Additionally, a section of the cliff has been naturally eroded to resemble a “Hand of God,” which is a famous viewpoint and photography spot from boats.

• By private car: Drive to Pak Nam Chumphon or Haad Sai Ri Beach. Park at the designated area of a tour company, then take a speedboat or long-tail boat to Ko Ngam Yai.

• By public transport: Take a train or bus to Chumphon Railway Station or Chumphon Bus Terminal. Then take a local songthaew or taxi to Pak Nam Chumphon Pier or Haad Sai Ri Pier to purchase a One Day Trip tour package and travel to the island.

• Landing on the island is not allowed due to the swiftlet nest concession.

• Recommended activities include snorkeling and scuba diving around the island.

• The best time to visit is January to April, when the sea is calm and water visibility is excellent.

Entrance Fee:

There is no direct entrance fee for the island, but a national park fee for Mu Ko Chumphon National Park applies

• Thai citizens: Adults 40 THB / Children 20 THB

• Foreigners: Adults 200 THB / Children 100 THB

Opening Hours:

• The island can be visited all year round via a One Day Trip tour package (most tours operate between 09:00–16:00).