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Snorkeling on Koh Mook : explore its hidden marine life
Koh Mook, a peaceful island in Thailand’s Trang province, is famous for its beautiful beaches, emerald waters, and stunning natural surroundings. While the island may not be as renowned for snorkeling as its neighbors like Koh Kradan, it still offers several great spots to explore the underwater world. Koh Mook’s snorkeling sites are known for their calm waters, colorful coral reefs, and an abundance of tropical fish, making it an ideal destination for both beginners and experienced snorkelers alike.
For those staying at Nature Hill on Koh Mook, you have the unique opportunity to explore the island’s own snorkeling spots or take a short boat ride to some of the best nearby islands for snorkeling in the Trang archipelago. In this guide, we’ll explore the top snorkeling spots on Koh Mook and share some tips to make the most of your underwater adventure.

Snorkeling at Ao Lo Dang Beach
One of Koh Mook’s quieter spots, Ao Lo Dang Beach is a great place to enjoy a peaceful snorkeling experience. Located on the southern side of the island, the waters here are clear and calm, providing excellent visibility. The coral reefs near the beach are home to a variety of tropical fish, including parrotfish, butterflyfish, and even the occasional moray eel.
Ao Lo Dang Beach is less crowded than the island’s more popular beaches, making it a perfect spot to enjoy a more tranquil snorkeling session. You can access the reefs easily from the shore, and the shallow waters make it suitable for beginners.
Tip : Snorkeling is best at high tide when the reefs are more accessible. Don’t forget to bring your own gear, as rentals may not always be available on this part of the island.
Emerald Cave : a unique snorkeling adventure
No trip to Koh Mook is complete without visiting the famous Emerald Cave. While the cave itself is the main attraction, the waters surrounding it also offer great snorkeling opportunities. The cave is located on the western side of the island and is only accessible by swimming or kayaking through a narrow tunnel. Once inside, you’ll be greeted by a hidden lagoon with crystal-clear waters.
While the snorkeling here is not as extensive as on other parts of the island, the experience of swimming through the cave and emerging into the lagoon is unforgettable. The surrounding waters also have some colorful coral formations and fish worth exploring.
Tip : Visit early in the morning to avoid the crowds, as Emerald Cave is one of Koh Mook’s most popular attractions.
Farang Beach (Charlie Beach)
Farang Beach, also known as Charlie Beach, is one of Koh Mook’s best-known spots and offers easy access to snorkeling right from the shore. The coral reefs near the beach are home to a variety of marine life, and the calm, shallow waters make it perfect for beginners or those who want to enjoy a leisurely snorkel.
The beach is also a great place to relax after a day of snorkeling, with a few local beach bars and restaurants nearby. The snorkeling here is not as vibrant as at neighboring islands like Koh Kradan, but it’s convenient if you’re already staying on Koh Mook and want a quick dip.
Tip : The water is clearest during high tide, so plan your snorkeling sessions accordingly.
Exploring the marine life of Koh Mook
While Koh Mook may not have as many renowned snorkeling spots as other islands, the waters around the island are still teeming with marine life. Common sightings include schools of damselfish, butterflyfish, wrasses, and parrotfish, as well as a variety of hard and soft corals. The best places to snorkel around Koh Mook are near the rocky outcrops and reefs that surround the island, providing plenty of opportunities to encounter vibrant underwater life.
For those interested in deeper waters and more diverse marine life, Koh Mook serves as an excellent base for snorkeling trips to nearby islands, such as Koh Kradan and Koh Ngai, both of which offer world-class snorkeling experiences just a short boat ride away.

The best time for snorkeling on Koh Mook
Like the rest of Trang’s islands, the best time to snorkel on Koh Mook is during the dry season, from November to April. During these months, the weather is sunny, and the sea conditions are calm, providing excellent visibility. The rainy season, from May to October, can bring rougher seas and reduced visibility, but certain sheltered areas may still be accessible for snorkeling.
Always check the local tide schedule before heading out, as low tide can expose the coral reefs and make snorkeling more challenging.
Always check local weather conditions and tide schedules before heading out to snorkel, as tides can affect visibility and the accessibility of certain coral reefs.
Where to stay for the best snorkeling experiences
For those looking to combine snorkeling with a comfortable stay, Nature Hill on Koh Mook provides an ideal base. From Koh Mook, it’s easy to arrange day trips to the best snorkeling spots on nearby islands, including Koh Kradan, Koh Ngai, and Koh Libong. Many local tour operators offer snorkeling packages that include multiple islands, allowing you to experience the best that Trang has to offer.
After a long day of exploring underwater, return to the peaceful setting of Nature Hill, where you can unwind and prepare for your next adventure.