Peaceful island between Koh Chang and Koh Kood with a handful of resorts, no cars, no nightlife, and perfect beaches. Ideal for digital detox and relaxation.
Koh Mak is a small island of approximately 16 square kilometres in the eastern Gulf of Thailand, positioned between Koh Chang to the northwest and Koh Kood to the southeast, in the Koh Chang National Marine Park, Trat Province. The island has a permanent population of around 3,000 people, most engaged in coconut palm and rubber plantation farming — a significant portion of the island's interior is still active agricultural land. There are no private cars on the island (only resort vehicles and a handful of island-owned trucks), and the single loop road is narrow enough that bicycles and scooters are the practical means of getting around. Two beaches handle most visitor accommodation: Ao Kao on the northwest coast and Ao Suan Yai on the west coast, both with calm, clear water suitable for swimming and snorkelling. The calm Gulf water and the near-total absence of speedboat traffic in the bay makes Koh Mak one of the quietest island experiences in Thailand outside the most remote archipelagos. The island consciously avoids mass tourism development — there are no nightclubs, no large resort chains, and no 7-Elevens. A community initiative limits resort licences and maintains environmental standards. Several small dive centres operate on the island offering certification courses and day trips to surrounding coral sites. The snorkelling directly from Ao Kao beach is good without needing a boat.
Highlights
- Ao Kao beach — calm, clear water ideal for swimming with snorkelling accessible directly from shore
- Car-free island environment with bicycle and scooter the only practical transport modes
- Active coconut and rubber plantations covering the interior — an agricultural island working alongside tourism
- Community-managed development limits protecting the island from large-scale resort construction
- Easy day-trip snorkelling to surrounding coral sites departing from the island's small dive centres
Tips for visiting
- Rent a bicycle (150 baht/day) or scooter (250 baht/day) at the pier — the island is easily looped in an hour
- Bring cash; ATMs are available but unreliable — the nearest reliable ATM is on Koh Chang
- Ao Suan Yai is slightly quieter than Ao Kao for those wanting more solitude
- Book accommodation in advance for December to February; the island fills with Thai weekenders
- Ferries from Laem Ngop pier near Trat take 1.5 hours; allow 5–6 hours total from Bangkok by bus
When to visit
November through April is high season in the Gulf of Thailand. The island is busiest on Thai public holidays and weekends from December to January; mid-week visits in February or March offer a very quiet experience. The monsoon (May to October) brings rough crossings and reduces beach quality.
Accessibility
The island's loop road is unpaved in sections, which makes wheelchair access by vehicle difficult. The beach at Ao Kao is sandy with no paved access to the water. The pier arrival is flat. Several resorts have relatively accessible layouts within their grounds, but the island's infrastructure is generally not designed for mobility accessibility.
Frequently asked questions
How do visitors get to Koh Mak?
Speedboats and slow ferries depart from Laem Ngop pier near Trat, reached by bus from Bangkok's Eastern Bus Terminal (about 5 hours) then minivan to the pier. Journey time from Laem Ngop is 1 to 1.5 hours depending on vessel.
Is Koh Mak suitable for families?
Yes — it is one of Thailand's best family island options. The absence of nightlife, the calm beach water, bicycle-friendly roads, and quiet pace make it very well suited to families with children of all ages.
Is there good snorkelling directly from Koh Mak beaches?
Yes. Ao Kao beach has accessible snorkelling off its northern headland without needing a boat. Visibility and coral health vary by season; November to May provides the best conditions.