Best islands in Thailand

Choose the coast before you choose the island

Travellers often shortlist islands before checking geography. The Andaman and Gulf islands sit on opposite coasts, have different typical rainfall peaks and require a long peninsula crossing between them. Combining both on a short trip can turn island-hopping into a relocation marathon.

There is a better first question, and it is almost dull: which coast? The Andaman coast in the west — Phuket, Krabi, Koh Phi Phi, Koh Lanta, Koh Lipe — is commonly more settled from roughly November to April and wetter from about May to October. The southern Gulf islands — Koh Samui, Koh Phangan, Koh Tao — usually have a later rainfall peak, often around October to December. Geography alone is not a weather rule: the eastern Gulf islands near Trat, Koh Chang and Koh Kood, are also commonly wetter from May to October rather than following Samui's later pattern.

The split helps narrow the island shortlist. In November the Andaman is commonly becoming more settled while the Gulf approaches its wetter period; in June or July the Gulf may be more settled than the monsoon-affected Andaman. These are tendencies, not forecasts: rain can be brief or prolonged, and current sea conditions and ferry status remain decisive.

Andaman vs Gulf: which coast, which month

The full coast-by-season breakdown — sea conditions, ferries and rain compared month by month.

Thailand island-hopping itinerary

How to sequence islands within one coast — and when crossing coasts is worth the travel day.

Match the island to the trip — and don't hop across coasts

Once the coast is set, choose the island by what kind of trip you actually want. For postcard scenery and longtail-boat beaches, the Andaman wins outright — Railay and Phi Phi are the images people travel for. For diving on a budget, Koh Tao has no rival in Thailand. For polished resorts and an easy family week, Koh Samui or a Phuket west-coast beach. For the Full Moon Party, only Koh Phangan. For a honeymoon mood — quiet, scenic, unhurried — Koh Lanta, Railay in Krabi, a northern Phangan retreat or far-flung Koh Kood. For genuine peace, the smaller islands: Lanta, Lipe, Kood.

The other discipline is restraint. Thailand's islands are close on a map and tempt people into four or five in ten days, but every move has a hidden cost: a transfer to the pier, a ferry or speedboat, a transfer at the other end, and the half-day of momentum lost to all of it. Two or three nights is the realistic minimum per island; three or four lets you actually settle. One coast and one or two islands almost always beats a frantic five.

And the rule that saves the most ruined days: do not island-hop across the two coasts mid-trip. Crossing from an Andaman island to a Gulf island means a full travel day over the peninsula — minivan and ferries, or a flight via the mainland. It is doable, but it is a relocation, not an island-hop. Keep your hopping within one coast unless your itinerary has the time built in for the crossing.

How to sequence islands by ferry logic

Worked Andaman and Gulf routes, plus when a cross-coast move is worth the day it costs.

Phuket — the Andaman gateway, with a base for every traveller

Phuket is the practical centre of the Andaman: its own international airport, ferries and speedboats to Phi Phi, Krabi and the smaller islands, and every tier of hotel on one island. That convenience is its strength and its trap — the wrong base can hand you the worst of Phuket, while the right one gives you a brilliant beach week. So Phuket is as much a where-to-stay decision as a whether-to-go one.

Patong is the loud heart — nightlife, big mid-range hotels, busy beach, and best for travellers who want energy and don't mind the crowds. South of it, Kata and Karon are the family-friendly middle ground: long swimmable beaches, a calmer strip, and a wide spread of mid-range and family hotels. The west-coast luxury runs north — Kamala, Surin and especially the Bang Tao stretch are where the five-star beach resorts and pool villas cluster, the natural choice for a honeymoon or a splurge. Rawai and the quiet south-east suit slower stays and longer-term visitors, while Phuket Old Town — Sino-Portuguese shophouses, cafés and street art, away from the beach — rewards a night or two for character over sand. Phuket is at its best November to April; in the green season prices drop and the island is lush, but the west-coast surf builds and some boat trips pause.

Phuket travel guide

Beaches, the Old Town, island access, nightlife and a full where-to-stay breakdown by area.

Krabi — Railay, Ao Nang and the limestone-cliff coast

Krabi is the Andaman for travellers who want the scenery without Phuket's scale. The headline is Railay — a cliff-ringed peninsula reachable only by longtail boat, with world-class rock climbing, two beaches and a genuinely cut-off feel; it is one of Thailand's most romantic bases and a honeymoon favourite, though the boat-only access and limited range of (mostly mid-to-high-end) resorts make it a place you commit to rather than day-trip. Ao Nang, on the mainland just across the water, is the practical hub: a walkable beach town with the widest spread of hotels from budget to comfortable mid-range, restaurants, and the boat pier for island-hopping day trips and Railay transfers.

Beyond those two, Krabi Town is the inland transport hub (cheaper, no beach), while quieter Klong Muang and Tubkaek to the north hold a cluster of calm, upscale beach resorts for travellers who want luxury without nightlife. Krabi suits couples, climbers, scenery-seekers and anyone who finds Phuket too much — and it shares the Andaman's November-to-April best season. For an unhurried honeymoon, base on Railay; for flexibility and value, base in Ao Nang and take the boats from there.

Krabi travel guide

Railay, Ao Nang, the cliff beaches, island day trips and where to base for scenery vs convenience.

Koh Phi Phi — dramatic, party-leaning and best in small doses

Koh Phi Phi delivers the most dramatic scenery of any Thai island — the sheer cliffs, the viewpoint over the twin bays, the turquoise water of the Maya Bay area made famous on screen and now visited under managed access rules. It is also the busiest and most party-leaning, with a compact, walkable, vehicle-free main village around Tonsai that turns lively after dark. That combination makes it polarising: unmissable for the scenery and the boat trips, overwhelming if you came for quiet.

For where to base, the choice is essentially noise level. Tonsai and the Loh Dalum bay behind it are the party centre — close to the bars, the boats and the buzz, and right for younger travellers and short stays. Quieter accommodation spreads toward Long Beach (a short boat or walk from the village) and, at the far north, the secluded upscale resorts of Laem Tong, which are a different, calmer island entirely. Many travellers find Phi Phi best as a one- or two-night stop or even a day trip from Phuket or Krabi rather than a long base — and like the rest of the Andaman it shines November to April, when the boat trips run reliably.

Koh Phi Phi travel guide

Beaches, the viewpoint, the Maya Bay rules, nightlife, and whether to overnight or day-trip in.

Koh Lanta — the slow, family-friendly Andaman island

If Phi Phi is the Andaman turned up loud, Koh Lanta is the volume turned down. It is a longer, low-key island of west-facing beaches that string south from the busier Long Beach (Phra Ae) to the quieter Klong Nin and the more remote, scenic Kantiang Bay near the national park at the southern tip. The pace is unhurried, the sunsets face west off the beach, and the vibe is families, couples and slow travellers rather than partygoers — which makes it one of the easiest, most relaxing Andaman bases.

Where to stay tracks how much quiet you want. Long Beach has the widest spread of hotels, restaurants and easy access; Klong Nin is the calmer middle with a good mix of mid-range and family resorts; Kantiang Bay is the most secluded, scenic and upmarket end. Lanta Old Town on the east coast offers character over swimming. The island is reached by ferry or minivan-and-ferry from Krabi or Phuket, and it follows the Andaman season — at its best November to April, with many places winding down in the green season when the seas roughen.

Koh Lanta travel guide

Long Beach to Kantiang, the national park, slow stays, family resorts and the green-season caveat.

Koh Samui — the polished Gulf gateway

Koh Samui is the Gulf's centre of gravity and the most developed of Thailand's beach islands: its own airport (so you can fly in rather than ferry), full-service resorts, a family-friendly polish, and an inland ring road tying the beaches together. It is the easy choice for travellers who want comfort and short transfers, and the natural Gulf base from which ferries run to Phangan and Tao. As the Gulf's anchor it follows that coast's season — often more settled from around January to September, though conditions vary, with a later rainfall peak than the Andaman.

Where to base is the real Samui decision. Chaweng is the main event — the longest, liveliest beach with the most hotels, nightlife and restaurants, best for first-timers who want everything on one strip. Lamai, just south, is a smaller, slightly calmer version of the same idea. Bophut's Fisherman's Village is the boutique-and-dining sweet spot with a charming old-shophouse strip; Maenam and Taling Ngam are quieter, more local and good value; and Choeng Mon in the north-east is the calm, family-friendly corner near the airport. Luxury and pool-villa resorts cluster on the headlands and the quieter north and west. Pick Chaweng for buzz, Bophut for character, Maenam or Choeng Mon for calm.

Koh Samui travel guide

The airport gateway, beach-by-beach where-to-stay, resorts and ferries on to Phangan and Tao.

Koh Phangan — Full Moon Party and the quiet wellness north

Koh Phangan is two islands sharing one name. The south-east corner around Haad Rin is the global home of the Full Moon Party — a monthly beach event that draws huge crowds and books out the surrounding accommodation around the date. But the rest of the island is the opposite: a low-key, increasingly wellness-focused place of quiet northern beaches, yoga and detox retreats, and jungle interior, popular with travellers who never go near the party at all.

So where you stay defines the trip almost entirely. Haad Rin is right for the Full Moon Party and the nightlife scene, but it is busy and not the prettiest base otherwise. Thong Sala is the main town and ferry hub, central and practical. Srithanu on the west coast is the wellness and yoga heart, with retreats and a health-food scene; Baan Tai and the south are budget-friendly and close to the party without being in it; and Thong Nai Pan and the quiet north-east beaches are the scenic, more upscale, get-away-from-it-all end. Phangan follows the Gulf season and is reached by ferry from Samui or the Surat Thani mainland — and ferry timing around the Full Moon Party dates is the thing most worth nailing down in advance.

Koh Phangan travel guide

Haad Rin and the Full Moon Party, the wellness north, where to base by mood and the ferry logic.

Koh Tao — a major Thai budget dive-training hub

Koh Tao is the smallest of the Gulf trio and the most single-minded: it is Thailand's diving island, where a huge share of visitors come to get certified, because the courses are among the cheapest in the world and the surrounding sites are accessible and varied. Even non-divers come for the snorkelling, the laid-back backpacker-leaning atmosphere and the viewpoints — but diving is the gravity here, and it is the one Gulf island that earns its place for a specific activity above all.

For where to base, Sairee Beach on the west coast is the main hub — the longest beach, most of the dive schools, the nightlife and the budget-to-mid accommodation, and the obvious choice for first-time divers who want everything walkable. Mae Haad is the ferry-pier town, practical and central. The quieter, more scenic bays — Chalok Baan Kao to the south, and the more remote Tanote and the east-coast coves — suit travellers who want calm over the dive-bar buzz. Koh Tao follows the Gulf season and is reached by ferry, usually via Koh Samui or Koh Phangan; the crossing is exposed, so it is worth nailing the ferry timing and watching the sea conditions in the later, rougher months.

Koh Tao travel guide

Diving and certification, snorkelling, Sairee vs the quiet bays, and how to plan the exposed ferry in.

Koh Chang and Koh Kood — the quiet east-coast pair

Near the Cambodian border, Koh Chang and Koh Kood offer an eastern-island trip without flying to the deep south. Koh Chang is the larger and busier of the two — mountainous and jungle-backed, with a string of west-coast beaches — and is reached by ferry from Trat province. It suits travellers who want jungle, waterfalls and beaches with a broad accommodation range.

Koh Kood (Koh Kut), further out, is quieter and less developed, with a smaller, more upscale-leaning spread of resorts. Both islands are commonly wetter from roughly May to October, when rough seas can reduce services and some businesses close. November to April is typically more settled, but verify the current ferry schedule, marine conditions and resort opening before you commit.

Koh Chang travel guide

White Sand Beach and the quieter bays, waterfalls, the ferry from Trat and the Bangkok approach.

Koh Lipe travel guide

The tiny far-south Andaman island for snorkelling and clear water near the Malaysian border.

Putting it together — one coast, the right island, the right base

Pull the threads together and the choice resolves cleanly. Settle the season first, which settles the coast. In the cool, dry months a first beach trip can hardly go wrong with the Andaman — Phuket or Krabi as a base, with Phi Phi or Lanta added by boat. A mid-year trip swaps to the Gulf and keeps the same shape: Samui as the comfortable base, Phangan or Tao reached by ferry. Then match the island to the trip — diving to Koh Tao, the Full Moon Party to Phangan, scenery and romance to Krabi or Lanta, family ease to Samui or Phuket's Kata and Karon, deep quiet to Kood or Lipe.

Finally, choose the base on the island, because that decision shapes the days more than the island name does: the loud main beach, the calm end, or the luxury pocket. Lock the peak-season beach hotels and the ferries or speedboats before the smaller details, build a buffer around every crossing, and re-check the live sea and ferry status close to the date — those are the volatile pieces. Do that, and you trade the exhausting five-island blur for the trip that actually feels like the islands you came for.

Koh Samui travel guide

The easiest Gulf base — fly in, settle by beach, and ferry on to Phangan or Tao.

Phuket travel guide

The easiest Andaman base — every tier of hotel and the boats to the islands beyond.

Thailand island-hopping itinerary

Turn the island choice into a worked, ferry-aware route within one coast.