Ko Tharai is one of the most beautiful and private islands within Hat Khanom–Mu Ko Thale Tai National Park in Nakhon Si Thammarat Province. Surrounded by crystal-clear emerald waters, the sea is so transparent that the sandy seabed and small schools of fish can be seen clearly from the boat.

The island remains free from resorts and large structures, allowing its coastal forest, rocky shores, and natural landscape to stay perfectly preserved. One of its most captivating features is the fine white sandy beach, stretching harmoniously alongside lush green vegetation that encircles the island.

Most visitors choose to charter a traditional long-tail boat from Laem Prathap Pier or Dan Phasi Pier to reach Ko Tharai. Along the route, there is a high chance of encountering pink dolphins, the iconic marine residents of Khanom, often swimming gracefully alongside boats and delighting visitors with unforgettable sightings.

The atmosphere on the island is exceptionally peaceful and private, making it an ideal destination for travelers seeking a break from crowds and daily stress. Popular activities include swimming in the shallow waters, relaxing on the beach, and enjoying panoramic views of the Southern Sea.

The sea surrounding Ko Tharai displays beautiful color gradients, ranging from light turquoise to deep blue, depending on water depth. During low tide, sandbanks and natural wave patterns emerge, creating stunning photo opportunities rarely found elsewhere.

Ko Tharai is commonly included as a key stop in Khanom’s marine tour programs, together with visits to Pancake Rock (Hin Phap Pha) and Ko Nui Nok. Tourism here follows a half-day visit concept to protect environmental balance in accordance with national park regulations.

The true charm of Ko Tharai lies in its simplicity, silence, and unspoiled nature, making it especially appealing to eco-travelers and nature lovers. Spending just a few hours on this island can restore energy, refresh the mind, and turn your Nakhon Si Thammarat trip into a truly memorable experience.

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How to Get There

• Long-tail boat charter: Available at Laem Prathap Pier or Dan Phasi Pier (Khanom Canal) Approximate price: 1,000–1,500 THB per boat (7–8 passengers)

• Tour programs: Join a pink dolphin watching tour, usually combined with stops at Ko Tharai, Pancake Rock, and Ko Nui Nok.

• Travel time: Approximately 20–30 minutes by boat, depending on sea conditions.

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Travel Tips

• Book boats in advance during peak season (February–May)

• Always check weather and sea conditions before departure

• Bring a dry bag to protect cameras and valuables

• There are no shops or facilities on the island, so bring water and snacks

• Wear a life jacket at all times while on the boat

• Use reef-safe sunscreen to help protect marine life

• Depart early (around 8:00 AM) for better dolphin-spotting chances

• Wear suitable footwear for sand and rocky areas

• Avoid loud noises to prevent disturbing wildlife and other visitors

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Admission Fee:

Entrance fee to Hat Khanom–Mu Ko Thale Tai National Park

• Thai nationals: 40 THB (adults) / 20 THB (children)

• Foreign visitors: 200 THB (adults) / 100 THB (children)

Opening Hours:

• Open daily from 8:30 AM – 4:30 PM (Closed during monsoon season, approximately November–December, as announced by the National Park)