From full-moon-party Ko Pha Ngan to peaceful Ko Lanta and the dramatic cliffs of Krabi, Thailand's islands offer something for every kind of traveller.
The longtail boat cuts through water so clear you can watch the shadow of the hull race across the sand below. Limestone karsts, bone-white and shaggy with jungle, jut from the Andaman Sea like the fins of prehistoric creatures. The air smells of diesel, frangipani, and the char from a beachside vendor grilling fresh prawns over coconut husks. Somewhere behind you, a hammock sways between two palms outside a $15-a-night bungalow. Somewhere ahead, a five-star villa with a private infinity pool is waiting to make you feel like you’ve earned something magnificent. Thailand’s islands have always been exceptional at this particular trick: making every kind of traveller feel like they found exactly the paradise they were looking for.
Thailand’s southern archipelago is not a single destination, it’s a collection of wildly different worlds packed within a few hours of each other by ferry or speedboat. Nowhere else on earth can a traveller go from world-class scuba diving among whale sharks one morning to sipping cocktails at a clifftop infinity bar by sunset, then wake up the next day in a sleepy fishing village where the loudest sound is a rooster. The food alone, fiery curries, perfectly balanced pad thai, mango sticky rice eaten warm from a street cart, could justify the flight. Add genuinely warm hospitality, budget options that make backpackers feel like kings, and luxury villas that rival the Maldives at a fraction of the price, and the islands become almost unfairly appealing.
Ko Tao: Dive the Gulf of Thailand for Less Ko Tao has a legitimate claim to being the best-value scuba diving destination on the planet. A PADI Open Water certification course runs around $300–350 USD, roughly half what you’d pay in Australia or the Caribbean. The dive sites around Sail Rock, a pinnacle that rises from deep water roughly 15 kilometres north of the island, regularly attract whale sharks between March and May. Book with Crystal Dive Resort or Big Blue Diving, both well-regarded operators on the island’s main strip in Mae Haad. Even non-divers find Ko Tao’s snorkelling extraordinary: hire a longtail from Mae Haad pier for $20 and spend a morning drifting over the coral gardens at Japanese Gardens bay.
Railay Beach, Krabi: The Beach You Can Only Reach by Boat Railay is cut off from the mainland by sheer limestone cliffs, and that inaccessibility is exactly its appeal. Take a longtail boat from Ao Nang pier (about 150 baht, 15 minutes) and arrive at a beach that looks like it was designed by a film set decorator. Rent rock climbing gear from Railay Rock Climbing for a half-day on the karst faces, routes suit beginners and experienced climbers alike, then reward yourself with a fresh seafood platter at The Grotto Bar, improbably tucked into a cave at the eastern beach. Stay until sunset: the light on the cliffs turns every shade of amber and rose.
Ko Phi Phi: Iconic Views, Worth the Crowds Yes, Ko Phi Phi Don gets busy, extremely busy in peak season. Go anyway, but go early. Hire a longtail at 6am for a sunrise trip to Maya Bay (the beach made famous by the 2000 film The Beach), which reopened in 2022 after a rehabilitation closure. The bay is still restricted to day visitors, but in the early morning before the speedboat tours arrive, it is genuinely stunning. Climb the Phi Phi Viewpoint, 30 minutes uphill from the village, for the postcard shot of the two islands connected by a narrow strip of land, turquoise water on both sides.
Koh Yao Noi: Slow Down in a Fishing Village Most tourists blow straight past Koh Yao Noi on the ferry between Phuket and Krabi. This is the correct thing to do if you want to escape them. Rent a motorbike for 250 baht a day and spend a morning winding through rubber plantations and past stilted wooden mosques. The island is predominantly Muslim and quiet, there are no full-moon parties here, no neon signs, no touts. Eat breakfast at the morning market in the main village: $1 will get you a bag of roti and a cup of thick, sweet Thai coffee. For a meaningful cultural exchange, arrange a longtail fishing trip through your guesthouse; most village families are fishermen who welcome visitors.
Ko Lanta: The Family-Friendly Favourite Ko Lanta’s west coast is strung with long, flat beaches perfectly suited to small children and anyone who finds Ko Phi Phi’s intensity exhausting. Klong Dao Beach, in the north, has calm water and a scattering of mid-range resorts with proper pools. Rent a scooter and drive south to Ko Lanta Old Town, a 19th-century Chinese-Portuguese fishing village on stilts above the water, for lunch at one of the wooden shophouse restaurants serving tom kha soup and green mango salad.
Budget: On Ko Tao, Sairee Cottage Resort offers clean bungalows steps from the dive shops from around $25 per night. On Ko Lanta, Lanta Casuarina Beach Resort has simple garden bungalows in the $30–40 range with excellent beach access.
Mid-range: Railay Princess Resort & Spa on Railay Beach sits in a garden setting with a pool and comfortable air-conditioned rooms from roughly $80–100 per night. Location is unbeatable.
Luxury: Six Senses Yao Noi on Koh Yao Noi is one of Southeast Asia’s finest resort experiences, private pool villas, extraordinary spa treatments, and jaw-dropping Phang Nga Bay views from $600+ per night. Worth every baht for a splurge night.
November through April is the golden window for the Andaman coast (Krabi, Ko Lanta, Ko Phi Phi, Koh Yao Noi), clear skies, flat seas, low humidity. The Gulf of Thailand islands (Ko Samui, Ko Tao, Ko Pha Ngan) follow a slightly offset schedule: their best months are February through October. Shoulder season, November and May, offers genuine value with thinner crowds and lower rates. Avoid the Andaman side from June to October when monsoon swell closes many dive sites and some resorts shut entirely.
Ko Samui has its own international airport with direct connections from Bangkok (55 minutes), Singapore, and Hong Kong. Phuket International Airport is the main hub for the Andaman islands, with direct flights from Europe, Australia, and throughout Asia. Bangkok’s Suvarnabhumi Airport connects everywhere. From the mainland, ferries and speedboats link all major islands; Lomprayah and Seatran are reliable operators. Between islands, longtail boats handle short hops (book through your guesthouse), while overnight ferries run between Ko Samui and Ko Tao for budget travellers.
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Thailand’s islands are not a secret, and they have not been for decades. What they have managed to hold onto, despite the crowds and the Instagram hordes and the Full Moon Parties, is something genuinely difficult to manufacture: beauty so extravagant it still catches you off guard. Book the ferry, throw your bag into a bungalow, and order the pad thai from the beach cart. The Gulf of Thailand is waiting, and it is every bit as extraordinary as advertised.
