Phuket and Koh Samui pull most of Thailand’s island traffic — and most of its crowds. The country has around 1,400 other islands, and a dozen of them are properly set up for visitors without ever feeling like a resort strip. Some you can reach in under three hours from Bangkok. Some take a full day. None of them have a Hard Rock Cafe.
This guide picks the twelve we send readers to most often when they want sand and quiet water without the package-tour density. Each entry covers what the island does best, the realistic cost of a few nights there, how to get there, and when it’s actually worth the trip.
Quick Picks: Which Island for Which Traveller
- Easiest weekend from Bangkok: Koh Samet — 3 hours door-to-door
- Most upscale and quiet: Koh Kood — empty beaches, five-star resorts, no day-trippers
- Best for families: Koh Mak — flat, cyclable, no jet skis, swimmable bays
- Clearest water: Koh Lipe — 20-30m visibility, Maldives-style clarity
- Best for diving: Koh Tao — 25+ sites, the world’s cheapest Open Water cert
- Most undeveloped: Koh Phayam — no paved roads, solar power, closed half the year
- Best low-key Andaman base: Koh Lanta — flat, long beaches, a real town with a sea-gypsy quarter
- Phang Nga Bay base without Phuket prices: Koh Yao Noi
- TAT’s “most beautiful”: Koh Kradan — six resorts, snorkel from shore
- Most uncrowded for backpackers: Koh Jum — bungalows from 600 THB
- Bangkok day trip: Koh Sichang — ferry from Si Racha, back by dinner
- Biggest forgotten island: Koh Chang — Thailand’s second-largest, half the visitors of Samui
1. Koh Kood — Quiet, Upscale, No Day-Trippers
Koh Kood sits at the far eastern end of the Trat archipelago, almost touching Cambodian waters. It’s the country’s fourth-largest island and one of its least developed — a function of being a five-hour journey from Bangkok, which keeps weekenders away and means the island stays in the hands of small resorts and a few flagship five-stars.
The beaches on the west coast (Ao Tapao, Ao Klong Chao, Ao Ngam Kho) are powdery, swimmable year-round in the dry season, and almost always empty after lunch. Inland, Klong Chao waterfall is a 15-minute walk from the road and the island has 11 catalogued natural attractions — waterfalls, mangrove trails, viewpoints — for a place 25 km long.
How to get there: Fly Bangkok to Trat (1 hour, Bangkok Airways), then minivan + speedboat or catamaran from Laem Sok pier (about 1 hour 15 minutes total). Or overland from Bangkok: 5-6 hours by bus to Trat, then boat. Boats run November to May; very limited in low season.
Where to stay: Soneva Kiri at the top, Shantaa Resort and Tinkerbell Privacy Resort in the upscale-but-sane bracket, and around 30 smaller properties from 1,500 THB up.
When to visit: December to April. The island effectively closes May to October.
2. Koh Mak — Family-Quiet, Eco-Run, Bicycle Country
A short hop from Koh Kood and Koh Chang sits Koh Mak — flat enough to cycle end-to-end in an hour, with five small beaches and a community of owner-operators who signed an eco-charter banning jet skis, banana boats, and most of the noise that defines Pattaya-style islands.
The atmosphere is the closest Thailand has to a Mediterranean back-island: low resorts, beach bars that close at 22:00, dive shops doing day-trips to neighbouring reefs. Families love it — the bays are shallow, the roads are safe to ride with kids, and there’s nothing to keep teenagers up past midnight.
How to get there: Fly Bangkok to Trat, then transfer to Laem Ngop pier and speedboat (45 min) or Boonsiri catamaran (1 hour). End-to-end about 4 hours.
Where to stay: Mira Montra Resort and Koh Mak Resort are the polished mid-range picks; budget bungalows from 800 THB. Eleven properties on Booking.com in total.
When to visit: November to April. Many places shut June to September.
3. Koh Samet — Closest Island to Bangkok
If you can spare a Friday afternoon and a Sunday evening, Koh Samet is the most practical island weekend in Thailand. The whole trip from central Bangkok is under three hours: minivan to Ban Phe pier, 30-minute ferry. The island is 6.5 km long, part-national-park, and the northern beach (Sai Kaew) is where the fire shows and beach bars live.
It’s no secret — book ahead for Friday and Saturday nights. But mid-week or off-season Samet is a remarkably quick decompression from the city: bright white sand, clear gulf water, no airport-to-pier connection at all.
How to get there: Ekkamai or Mo Chit bus terminal to Ban Phe (3 hours, 200 THB), or minivan from Victory Monument. Ferry every 30-60 minutes for 100 THB; speedboat 200 THB.
Where to stay: Paradee Resort and Le Vimarn Cottages for the boutique end; mid-range bungalows from 1,000 THB on Sai Kaew or quieter Ao Wong Deuan.
When to visit: Year-round — Samet sits in a microclimate that gets less monsoon than the rest of the eastern seaboard. Avoid Songkran weekend and major Thai public holidays unless you like queues.
4. Koh Phayam — Off-Grid Andaman Backwater
Two ferries off the Ranong coast, Koh Phayam is the island Thai travellers go to when they want to disappear. Eight kilometres long, no paved roads (you ride a sandy red-clay track), almost entirely solar-powered, and shut for most of the rainy season. There are 15 bookable properties and one main beach (Ao Yai) with a half-dozen low-key bungalow places.
It’s not for everyone — power can flicker, the pharmacy is basic, the food scene is “what’s in the kitchen tonight.” But if you want a place that feels like Koh Lanta did in 1995, this is the closest you’ll get in 2026.
How to get there: Fly Bangkok to Ranong (1 hour 20 min, Nok Air), taxi to the pier (15 min), then a 2-hour slow ferry or 35-minute speedboat. End-to-end about 5 hours from Bangkok.
Where to stay: Phayamas Private Beach Resort and JJ Beach Resort are the established options; rustic bungalows from 600 THB.
When to visit: November to April only. Don’t try in May-October — most places are shut and ferries reduce.
5. Koh Lanta — The Andaman’s Best Family Base
Koh Lanta is the island that grew up. Where Phi Phi went party-strip and Phuket went mega-resort, Lanta turned into a long flat island of beach bars, dive shops and chilled-out resorts that families and remote workers keep returning to. The west coast is one long row of beaches: Klong Dao (family-friendly), Long Beach (best sand), Khlong Khong (cheap-and-cheerful), and Bamboo Bay at the southern end.
Old Town on the east coast is the surprise. A working Chao Ley sea-gypsy port with wooden houses on stilts over the water, a couple of seafood restaurants on the pier, and almost zero tourists.
How to get there: Fly to Krabi, then minivan + two short ferries (2 hours, 350 THB). High season has direct boats from Phuket and Ao Nang.
Where to stay: Pimalai Resort at the top end; Thai Smile Bungalows for backpackers; 43 mid-range properties across the island.
When to visit: November to April for dry weather and full restaurant scene.
6. Koh Yao Noi — Phang Nga Bay Without the Phuket Markup
Koh Yao Noi is a 30-minute longtail from Phuket and sits right in the middle of the postcard-perfect Phang Nga Bay limestone scenery. The island itself is a Muslim fishing community that’s deliberately stayed low-rise. There are no nightclubs, no jet ski operators, and the muezzin call is the loudest thing you’ll hear most days.
Activities are bay-focused: kayaking through karst hongs, rubber-tapping tours with local families, day-trips to James Bond Island without the Phuket queue.
How to get there: Speedboat from Phuket’s Bang Rong pier (30 min) or from Krabi’s Ao Nang/Thalane (45 min). Yao Noi has 14 catalogued attractions but most visitors come for the bay views and the slower pace.
Where to stay: Six Senses Yao Noi for splurge; Koyao Bay Pavilions and Island Yoga in the middle; a handful of homestays with local families.
When to visit: November to April.
7. Koh Lipe — Thailand’s Clearest Water
Far south in the Tarutao Marine Park, on the Andaman side near the Malaysian border, Koh Lipe is small (3 km long), busy in high season, and home to some of the clearest water you’ll find anywhere in Southeast Asia. Snorkelling 50 metres off Sunrise Beach gets you over hard coral with parrotfish and the occasional reef shark.
Walking Street is the spine of the island — a sandy lane of bars and restaurants that hits its stride after sunset. By 09:00 the next morning it’s quiet again. Lipe gets the Maldives comparison a lot, and at high season prices (3,000-7,000 THB a night) it’s not totally undeserved.
How to get there: Fly to Hat Yai, then minivan + ferry from Pak Bara pier (4-5 hours total). Or speedboat from Langkawi if you’re coming from Malaysia.
Where to stay: Serendipity Beach Resort and Idyllic Concept Resort for boutique; Castaway Beach Resort for divers; budget bungalows on Sunrise Beach from 1,200 THB.
When to visit: November to April. Closed May to October.
8. Koh Tao — Cheapest Open Water Cert in the World
Koh Tao earns its place not for the beaches (they’re fine, not stunning) but for what’s underwater. Twenty-five dive sites within 30 minutes, granite boulder dives, whale shark encounters in season, and the highest density of dive schools per square kilometre on the planet. A 3-day PADI Open Water course costs around 10,000 THB — half what you’d pay in Australia.
It’s also a backpacker-economy island, which means good cheap food and a hostel scene that pushes the social mood up. Not the place for a quiet beach week; very much the place to learn to dive.
How to get there: Overnight ferry from Chumphon (8 hours) or fast ferry from Koh Samui (1.5 hours).
Where to stay: Sairee Beach for the social scene; Chalok Baan Kao for quieter; Tanote Bay for diving-focused.
When to visit: March-May has the calmest water and best visibility. November-December gets monsoon swell.
9. Koh Jum — Bungalow Backpacker Holdout
Between Koh Lanta and the Krabi mainland sits Koh Jum, an island most travel companies don’t even sell. There are no ATMs, no big resorts, no nightlife, and bungalows that haven’t put up prices much since 2015. It’s the kind of place backpackers complained had gentrified five years ago and is somehow still the same.
Two small villages, three long beaches, and a low forested ridge running down the middle. You ride a moped between bungalow places, you eat where you’re staying, and you read a lot of books.
How to get there: Boat from Krabi’s Klong Hin pier (90 min) or ferries from Phi Phi and Lanta drop passengers off Koh Jum on the way past.
Where to stay: Koh Jum Beach Villas at the top; rustic places like Joy Bungalows or Bonbao from 600 THB.
When to visit: November to April only — most of the island shuts in low season.
10. Koh Kradan — TAT’s “Most Beautiful Island”
Koh Kradan in the Trang archipelago is officially Thailand’s most beautiful island, per the TAT — a designation backed up by powdery white sand, water clear enough to read a book through, and a coral reef that starts 10 metres from shore. The catch: there are only six resorts on the entire island, and no ATMs, so you bring cash from Trang before the boat.
It’s quiet. The beach has no bars, no chairs hired out by the hour. You eat at your resort, you swim, you read, you snorkel. Repeat.
How to get there: Boats from Pak Meng pier (Trang, 50 min) and Hat Yao pier (Trang, 30 min). Get to Trang via flight from Bangkok (1 hour 20 min) or overnight train.
Where to stay: Six properties total: Anantara Si Kao (across the channel), Seven Sea Resort, Reef Resort, Paradise Lost, and a few more in the mid-range.
When to visit: November to April. Most resorts close in monsoon.
11. Koh Sichang — The Day-Trip Island
Koh Sichang is the closest island to Bangkok with regular ferries — 45 minutes off Si Racha, and Si Racha is 90 minutes from Bangkok. You can ferry over, see the old summer palace ruins, eat seafood, and be back in the city for dinner. Most Thai tourists do exactly this.
It’s not a beach destination — the island is rocky and the few sandy bits are modest. But it’s the easiest Thailand-island experience there is, and the cluttered fishing-port atmosphere has its own pull.
How to get there: Bus or van from Bangkok’s Ekkamai to Si Racha (90 min), then ferry from the pier behind Wat Koh Loy (45 min, 50 THB).
Where to stay: Small guesthouses if you stay overnight; most visitors return same-day.
When to visit: Any time. Avoid major Thai public holidays.
12. Koh Chang — Thailand’s Forgotten Big Island
Koh Chang is the country’s second-largest island after Phuket but somehow gets a fraction of the visitors. White Sand Beach (Hat Sai Khao) is the main strip — long, swimmable, with a row of beach bars and mid-range resorts. South of there, Klong Prao and Kai Bae get progressively quieter, and at the south end Bang Bao is a stilted fishing village that’s also the launch point for snorkelling boats to the smaller islands of Koh Wai and Koh Rang.
It’s bigger and busier than Koh Mak or Koh Kood but still nothing like Phuket. Good for travellers who want some amenity (bigger supermarkets, proper restaurants, decent variety) without giving up the island feel.
How to get there: Bus from Bangkok to Trat (5 hours), short transfer to Centerpoint or Ao Thammachat pier, 30-minute ferry. Or fly Bangkok–Trat and connect by minibus + ferry (2 hours total).
Where to stay: Resorts span the price range — boutique places like The Emerald Cove at the top, plenty of mid-range and backpacker options across the west coast.
When to visit: November to April. The east coast stays reasonably calm even in the shoulder seasons.
Practical Comparison
| Island | From Bangkok | High Season | Day-trippable | Best For |
|---|---|---|---|---|
| Koh Sichang | 2.5 hours | Year-round | Yes | Quick escape |
| Koh Samet | 3 hours | Year-round | Yes | Easy weekends |
| Koh Chang | 5 hours | Nov-Apr | No | Big-island balance |
| Koh Mak | 5 hours | Nov-Apr | No | Families, cycling |
| Koh Kood | 6 hours | Dec-Apr | No | Quiet luxury |
| Koh Phayam | 5 hours (fly) | Nov-Apr | No | Off-grid |
| Koh Yao Noi | 5 hours (fly) | Nov-Apr | No | Phang Nga Bay |
| Koh Lanta | 4 hours (fly) | Nov-Apr | No | Family base |
| Koh Jum | 5 hours (fly) | Nov-Apr | No | Backpacker quiet |
| Koh Kradan | 6 hours (fly) | Nov-Apr | No | Snorkelling |
| Koh Lipe | 8 hours (fly) | Nov-Apr | No | Clearest water |
| Koh Tao | 12 hours (overnight) | Mar-May | No | Diving |
Picking the Right One
A few rules of thumb based on what readers come back and tell us:
- Short on time or budget: Koh Samet or Koh Sichang — both reachable without flying.
- Travelling with kids: Koh Mak first, Koh Lanta second. Both have flat terrain, swimmable bays, low-traffic roads.
- Honeymoon or special trip: Koh Kood or Koh Lipe — most likely to feel “we splurged on something good”.
- First time in Thailand and want a “real” island: Koh Lanta — has enough infrastructure to be comfortable, enough character not to feel like a resort.
- Repeat visitor wanting somewhere new: Koh Phayam or Koh Jum. Both feel a generation behind the more famous islands, in the best way.
For deeper guides to any of these destinations, the linked location pages cover accommodation, attractions, and the practicalities in more detail. If you want broader beach picks across the country (not just islands), our best beaches in Thailand guide covers the wider mainland-coast options.