Koh Mak
Koh Mak is a small, flat island in the Trat archipelago that has earned the distinction of being Thailand's first 'Low Carbon Destination.' With no jet skis, no big parties, and limited development, this coconut-plantation-covered island offers a genuinely peaceful escape. The island is only 16 km² with around 400 permanent residents, mostly descended from the five families who originally settled here. Koh Mak is perfect for travelers who want to unplug, cycle through palm groves, and enjoy uncrowded beaches.
Why this island
Koh Mak stands out for Ao Kao Beach, Cycling, Eco-Tourism. Use this page to decide whether it works as a real base, not just a name on a day-trip list.
Does it fit your trip
Koh Mak makes the most sense when you want a Gulf base with room for diving days, slower beach time, or links to neighboring islands.
Season note
Season windows on this page are broad planning guides. Confirm exact ferry schedules and marine park operations closer to your travel date.
Beaches
Where Koh Mak is strongest
Beaches vary considerably across the island. The labels indicate what each beach suits best — useful for matching your priorities.
Ao Kao Beach
The most popular beach on Koh Mak, a beautiful crescent of white sand on the southwest coast with crystal-clear shallow water perfect for swimming. Most of the island's resorts line this beach, yet it never feels crowded.
Ao Suan Yai Beach
A long, quiet beach on the northwest coast with stunning sunset views over Koh Chang and Koh Kham. The shallow water stretches far out, making it safe for children. A few beach restaurants serve fresh seafood.
Ao Khao Beach
A secluded beach on the south coast with a more rugged feel, flanked by mangroves and coconut palms. Less developed than the main beaches, offering a true castaway experience. The snorkeling off the rocks is decent.
Activities
What to do on Koh Mak
Price ranges are market-average estimates for 2025–2026. Use comparison platforms for exact current pricing before booking.
Cycling Around the Island
Free-$adventure
The flat terrain and quiet roads make Koh Mak perfect for cycling. The full circuit takes about 2 hours, passing through coconut plantations, rubber tree groves, and charming villages. Most resorts offer free or cheap bicycle rental.
Koh Kham Snorkeling Trip
$-$$day_trip
A short longtail boat ride to nearby Koh Kham, a tiny private island with pristine coral reefs and incredibly clear water. The snorkeling here is among the best in the Trat archipelago. Some tours combine Koh Kham with Koh Rayang.
Koh Mak Cooking Class
$-$$cultural
Several small operators offer Thai cooking classes using fresh, locally sourced ingredients. The intimate setting on a small island makes these classes feel more personal than those in tourist hotspots. Learn to make pad thai, green curry, and mango sticky rice.
Kayaking & Stand-Up Paddleboarding
Free-$water_sport
The calm, shallow waters around Koh Mak are ideal for kayaking and SUP. Paddle along the coastline, explore mangrove channels, or cross to nearby islets. Most resorts offer complimentary kayaks and SUP boards for guests.
Getting there
Reaching Koh Mak
Journey times and prices are estimates. Confirm current ferry and flight schedules closer to your departure date.
Bus to Trat + Speedboat
6-7 hours
Take a bus from Bangkok's Eastern Bus Terminal (Ekkamai) to Trat (4-5 hours), then transfer to Laem Ngop Pier for a speedboat to Koh Mak (1 hour). Combined tickets are available. Boats run 2-3 times daily in high season.
Minivan + Speedboat
5-6 hours
Private minivans from Bangkok to Laem Ngop Pier, then speedboat to Koh Mak. Slightly faster and more comfortable than public buses. Can be booked through travel agents or online.
Flight to Trat + Speedboat
2.5-3 hours
Bangkok Airways flies daily to Trat airport (1 hour), then transfer to the pier for a speedboat to Koh Mak. The fastest option but flights are limited and relatively expensive.
From Koh Chang
1-2 hours
If already on Koh Chang, speedboats run to Koh Mak from Bang Bao Pier (1 hour). A great way to combine both islands in one trip. Service operates daily during high season.
Where to stay
Stay areas on Koh Mak
Where you stay shapes the pace of your days. Each area has a different character and proximity to the main beaches and activities.
Ao Kao (Southwest)
$$-$$$The main tourist area with the best beach and most accommodation options. A good mix of mid-range resorts and simple bungalows. This is where most visitors stay and where the main pier is located.
Ao Suan Yai (Northwest)
$$A quieter alternative with lovely sunset views and a handful of relaxed resorts. Ideal for couples and anyone wanting extra tranquility. A short motorbike ride to the main area.
Sources and editorial notes
How this guide was compiled
This Koh Mak guide was manually revised in March 2026. Season windows and practical details are intentionally kept broad where operational specifics — ferry schedules, park fees, operator terms — change frequently enough that precise claims would mislead.
Frequently asked questions
When does Koh Mak fit best in an itinerary?
Koh Mak fits best in trips targeting Nov-Apr as the safest broad high-season window. November to April offers the best weather with sunny skies and calm seas. The monsoon season from June to September brings rain and reduced boat services, with some resorts closing for the season. May and October can offer good value with decent weather. Koh Mak gets particularly busy during Thai public holidays, especially New Year and Songkran.
Is Koh Mak a good base island?
Koh Mak makes the most sense when you want a Gulf base with room for diving days, slower beach time, or links to neighboring islands. Focus on pace, how many beach days you want, and how much transfer time you are willing to absorb.
Where should you start when planning for Koh Mak?
Start with beaches, stay areas, and arrival logic. That trio tells you faster whether Koh Mak fits your trip than a generic activity ranking does.