Koh Kalok is one of the important islands of the Ngaam Archipelago, Chumphon Province, and is acclaimed as a “legendary snorkeling spot” of the Gulf of Thailand. With the richness of coral reefs and diverse marine life, the island has no beaches but stands out with rock formations and high cliffs emerging from the water, which from a distance resemble a human skull, giving the island its name, “Koh Kalok.”

Beneath the water around the island is another world full of life, featuring brain coral (Brain Coral), Porites coral, and brightly colored sea anemones covering wide areas, along with schools of fish such as yellowtail fish, giant trevally, parrotfish, butterflyfish, and occasionally large spadefish swimming around the island.

In addition, the shallow waters around the island are ideal for snorkeling for both beginners and experienced divers, but currents can be strong at times, so swimming should be done under the supervision of a skilled instructor or tour guide. Usually, ropes are provided at snorkeling points for safety.

Koh Kalok is often included in the popular “4-Island Snorkeling Tour” of Chumphon, which includes Ko Ngaam Noi, Ko Ngaam Yai, Ko Thalu, and Koh Kalok. Visitors can take a speedboat or long-tail boat from Hat Sai Ree or Pak Nam Chumphon, with a travel time of 20–30 minutes.

Although the island has no structures or land resting points, its underwater natural beauty and pristine environment make Koh Kalok a diver’s paradise, perfect for experiencing the marine world up close.

• Private car: Drive from Chumphon city to Hat Sai Ree or Pak Nam Chumphon, the main piers for snorkeling trips. Parking is available at the pier area.

• Public transport: Take a songthaew or taxi from Chumphon city to Hat Sai Ree, then board a tour boat or speedboat to Koh Kalok, about 20–30 minutes.

• Best time: December–April, when the sea is calm and underwater visibility is excellent.

• Bring snorkeling gear and reef-safe sunscreen.

• Do not take coral, sea anemones, or marine life as souvenirs to preserve the ecosystem.

• Check weather and currents before heading out.

Entrance Fee:

Ko Kahok is part of Mu Ko Chumphon National Park. Visitors are required to pay a park entrance fee (not including boat service)

• Thai Nationals: Adults 40 THB / Children 20 THB

• Foreign Visitors: Adults 200 THB / Children 100 THB

Opening Hours:

• Open daily for snorkeling and diving activities from 08:00 AM – 04:00 PM (depending on tour schedules and weather conditions).