The first time I tried to island hop in Thailand I treated it like a checklist. Phuket on Monday, Phi Phi on Tuesday, Krabi on Wednesday, home by Sunday with a tan and a camera roll full of the same turquoise water. By Wednesday afternoon I was sitting on a pier in Ao Nang with a sunburnt neck, a missed ferry and the slow realisation that Thailand's islands are not a single place you "do". They are two separate coastlines, two different weather systems, and dozens of islands that each have their own mood. This guide is what I wish somebody had handed me before that trip: a straight account of how the islands fit together, how to move between them without losing a day to logistics, and what to book ahead from Singapore so the rest of the trip can stay loose.
Start by understanding there are two seas
Almost every planning mistake I see comes from not realising that Thailand has two island coasts that barely talk to each other. On the west sits the Andaman Sea: Phuket, the Phi Phi group, Krabi's mainland beaches and the islands off them, Koh Lanta, Koh Lipe near the Malaysian border, and the dramatic limestone karst of Phang Nga Bay. On the east, in the Gulf of Thailand, you have Koh Samui, Koh Phangan, Koh Tao and the Ang Thong marine park. There is also a third cluster on the eastern seaboard near Pattaya, with Koh Larn as its famous day-trip island, but that is a quick weekend hop from Bangkok rather than a proper island-hopping circuit.
The two main coasts have opposite weather. When the Andaman side is getting its heaviest rain and its roughest seas, the Gulf side is often having its best weeks, and the reverse is true a few months later. That single fact is worth more than any list of beaches, because it tells you which half of the country to build your trip around depending on the month you can travel. It also means you should not try to combine Phuket and Koh Samui in one short trip. They look close on a map, but getting from one to the other overland and by sea takes most of a day, and a flight usually routes you through Bangkok.
For a first island-hopping trip from Singapore I almost always recommend the Andaman side. The islands sit close together, the boat connections are frequent, and a lot of the famous scenery is reachable on organised day trips. The Gulf side rewards a longer, slower trip and suits people who want to settle on one or two islands rather than keep moving.
When to go, month by month
People talk about "the dry season" as if it were one thing. In practice it changes by coast, and the shoulder months are where the interesting trade-offs live. The table below is how I think about it after travelling the islands in both the good and the soggy months. Treat it as a guide rather than a promise, because Thai weather has become less predictable in recent years and a rainy month can still hand you a week of blue sky.
| Months | Andaman side (Phuket, Krabi, Phi Phi) | Gulf side (Samui, Phangan, Tao) |
|---|---|---|
| November to February | Calm seas, clear water, the busiest and most expensive stretch. December and early January are the peak of the peak. | Wetter at the start of the period, with the heaviest rain often falling in November. Improves sharply from January. |
| March to April | Hot, glassy and very good for swimming and snorkelling. Fewer crowds than the winter peak. | Dry and bright. Arguably the sweet spot for the Gulf. |
| May to June | Rains return and the swell builds. Some boat trips get cancelled or rerouted. | Generally still pleasant, with afternoon showers rather than all-day rain. |
| July to September | Monsoon. Red flags on beaches, rougher crossings, lower prices. Strong currents make some swimming unsafe. | The best weather of the year on average, though not always consistent. |
| October | Often the wettest month in the Andaman. I would avoid it for island hopping. | Rain building towards the November peak. |
If you are tied to the Singapore school holidays, which fall in June and again in late November and December, you will be travelling in one of the awkward windows. June leans towards the Gulf, and the year-end break leans towards the Andaman, with the caveat that it is also when everyone else wants the same boat. Book your flights and your first few nights early, but leave the middle of the trip flexible. The weather will decide at least one of your days for you.
Getting there from Singapore
Phuket has direct flights from Singapore, which makes it the easy gateway for the Andaman islands. Krabi is also served by direct or one-stop routings depending on the season, and flying into Krabi makes sense if your plan centres on Koh Lanta, Railay and the Phi Phi group. For Koh Samui you can fly direct from Singapore as well, though schedules and fares shift from season to season, so check before you commit to a route. Fares move a lot between the school holidays and the quiet months, and the cheapest option on paper is not always the cheapest once you count baggage and the cost of the airport transfer at the other end.
One practical habit I picked up the hard way: plan your arrival and departure airports separately. An open-jaw ticket, flying into Phuket and out of Krabi for example, saves you a full day of backtracking if you are moving south or north along the coast. Airline websites tend to price these fine, but they bury the option, so search two single tickets as well as a return.
Here is a small tip that helps with the paperwork rather than the flying. Some visa applications and a few onward-travel checks ask for proof of an outbound flight before you have committed to a fare. If that is you, our flight reservation service gives you a dated reservation to show for that purpose, without buying a full ticket you might change. It is a reservation rather than an issued ticket, so it is meant for paperwork, not for boarding the plane. Use it for that and book your real flight once your dates are firm.
Entry rules in plain language
Singapore passport holders have generally been able to enter Thailand for tourism without a visa for a short stay, and our own fact sheet lists a free visa exemption for Singapore and Indian passport holders at 30 days, with other sources quoting a longer exempt period. That mismatch is exactly why I never rely on memory for this. Thai entry rules have been revised more than once in recent years, and Thailand also asks arriving travellers to complete a digital arrival card ahead of the trip. Check the current position for your own passport on our visa requirements page before you book anything non-refundable, and look at the official arrival-card site a few days before you fly.
If you do need a visa, because you hold a different passport or because you want to stay longer than the exemption allows, the tourist e-visa is applied for online before you travel. Our fact sheet lists a fee of about THB 1,000, a validity of three months from issue, a stay of up to 60 days and a processing time of around two weeks, so do not leave it to the week before departure. Make sure your passport has at least six months of validity left and blank pages for the stamps. Island hopping often means crossing between ports with small immigration desks for onward trips to Malaysia, which is where a nearly expired passport becomes a real headache.
Phuket: the base, not the point
Phuket is the biggest island and the best connected, so it is where most Andaman trips begin. It is also the island people most often dismiss, usually after a night on Bangla Road in Patong. That is a shame, because the island is large and the character changes completely depending on where you sleep. Patong is loud, dense and convenient. Kata and Karon are calmer and good for families. Surin and Bang Tao on the west coast have a polished beach-club feel. The south, around Nai Harn and Rawai, is where I like to stay: quieter, with local seafood restaurants and a rhythm that lets you ease into the trip.
Do the old town. Phuket Town's Sino-Portuguese shophouses, the Sunday walking street market and the small coffee places are the part of the island that feels like somewhere people actually live. I would spend a morning there on the day you land or the day you leave, when the beach is not an option. Wat Chalong, the island's largest temple, is the other cultural stop and takes under an hour. The big white Buddha on the hill above Chalong is a short drive further and the view across the island is worth the winding road up.
For evenings, Phuket does spectacle well. If you want a night out that does not involve a bar, Simon Cabaret is the long-running show, with elaborate costumes and choreography and a guaranteed laugh. Tickets start from S$28.10. It is polished entertainment rather than anything cultural, and it works well for a group with mixed ages when everyone is sunburnt and nobody wants a late night.
Phang Nga Bay and the James Bond Island day
North-east of Phuket the sea fills with limestone towers rising straight out of green water. This is Phang Nga Bay, and it is the landscape that most people picture when they imagine the Thai islands. The famous stop is Khao Phing Kan, better known as James Bond Island after the 1974 film that used it as a backdrop. Be realistic about it: the island itself is small, crowded between mid-morning and early afternoon, and you will share the viewing platform with many other boats. What makes the day worthwhile is everything around it. Sea canoeing through hongs, the hidden lagoons inside the cliffs, drifting under hanging stalactites at low tide, and passing the stilted fishing village of Koh Panyee for lunch.
The shared-boat day trip is the cheapest way to see it. The James Bond Island join tour starts from S$36.84, and note that the listing excludes the national park fee, so keep some cash for that on the day. The trade-off with any joined trip is timing. You follow the boat's schedule, and the crowds follow the same schedule. If you can afford it, a private longtail charter or an early-start tour reaches the bay before the main flotilla and changes the experience entirely.
Take a dry bag. You will step off a longtail into knee-deep water at least once, and phones do not forgive it. Wear a rash vest or a light long-sleeved top, because the sun on open water burns far faster than it does on a beach with shade. I learned that on the Ao Nang pier I mentioned at the start.
The Phi Phi islands, and how to see them without the worst of the crowds
Koh Phi Phi is two main islands. Phi Phi Don is the inhabited one, where the ferries dock, with a crowded village on a narrow sandy isthmus and two bays that look like a postcard from the viewpoint. Phi Phi Leh is the smaller uninhabited island next door, with Maya Bay and the Pileh Lagoon. Maya Bay became famous through a 2000 film, was closed for several years to let the reef recover, and has since reopened with restrictions on visitor numbers and on how boats approach it. The rules have changed over time, so ask your operator what applies on your date.
There are really three ways to do Phi Phi. You can take the ferry from Phuket or Krabi, stay the night on Phi Phi Don and make your own trips by longtail. You can day trip it from Phuket by speedboat or catamaran, which is rushed but efficient. Or you can book a full-day yacht or large-boat itinerary that strings several stops together. I prefer the overnight option when time allows, because the island is far calmer at dawn and in the evening after the day boats leave. If you only have a day, the multi-island yacht format is the one I would pick. The Once Yachting trip covers Phi Phi, Maya, Bamboo, Khai and Maiton islands for S$91.65, and the smaller yacht group size makes the swim stops feel less like a theme park queue.
Bring reef-safe sunscreen, or better, cover up. The coral around the popular snorkelling stops is under pressure, and chemical sunscreen is one of several irritants. If a guide tells you it is fine to stand on the coral or feed the fish, that is your cue to move away from that group.
Krabi, Railay and the quieter south
Krabi province is where the Andaman starts to feel less manufactured. Ao Nang is the resort town, handy but busy. A short longtail ride away, Railay is a peninsula that can only be reached by boat, which gives it the feeling of an island without being one. The four beaches there, Railay West, Railay East, Phra Nang and Tonsai, are walled in by climbing cliffs, and the area is a world-class rock climbing spot. Even if you never touch a rope, the sunset from Railay West and the walk to the Phra Nang cave are among the finest hours on the entire coast.
The four-islands trip out of Ao Nang, visiting Koh Poda, Chicken Island, Tup Island and Phra Nang beach, is a classic and a gentler alternative to the Phi Phi circuit. The sandbar between Tup Island and Koh Kai appears at low tide and vanishes at high tide, so ask when your tour hits it, because the timing decides whether you walk across or stare at water. Further out, the Hong Islands offer a more protected lagoon and some good kayaking.
If you fly into Krabi airport, which is a sensible gateway for this part of the trip, the airport is a drive of around forty minutes from Ao Nang. A pre-booked transfer removes the haggling at the arrivals taxi desk. The Krabi airport to Ao Nang one-way transfer comes in from S$33.38, and you will be glad of a driver waiting after a long travel day.
Koh Lanta and Koh Lipe: slower islands for a longer trip
Koh Lanta is a long, thin island south of Krabi with a laid-back reputation that is mostly deserved. The west coast has a string of beaches in different moods, from the mid-range resorts of Klong Dao and Long Beach to the quieter, rockier southern stretches. Old Lanta Town on the east side is a stilt-house fishing settlement with a few good restaurants and some of the best seafood on the coast. Lanta's snorkelling and diving trips go to Koh Rok and Koh Haa, two marine park sites which are only open for part of the year, typically in the drier months. If those are why you are coming, check the open dates before you book your flights.
Koh Lipe is a further jump, in the far south close to the Malaysian border. It is the closest thing Thailand has to a Maldives-style water colour, with white sand and very clear seas, and it takes some effort to reach. Boats run seasonally and generally pause in the heaviest monsoon months. The trade-off is that it is more expensive, busier than the photos suggest in peak season, and not an easy add-on for a short itinerary. I would only add Lipe if you have at least a week on the Andaman side.
The Gulf: Samui, Phangan and Tao
The Gulf islands are a different trip, and they are worth the separate effort. Koh Samui is the big one, with an international airport, a full range of hotels, and beaches like Chaweng, Lamai and Bophut with different personalities. Chaweng is lively and commercial, Lamai a little more relaxed, and Bophut's Fisherman's Village has a pleasant evening market and a cluster of restaurants. The Big Buddha temple on the north-east tip, Wat Phra Yai, is the landmark you will see on every postcard, and the Na Muang waterfalls are a decent break from the sun if you hire a scooter or a driver for the afternoon. Hire a scooter only if you are an experienced rider with a valid licence and decent insurance. The roads are steep, wet in the rain and are the source of more holiday injuries than any boat ever causes.
From Samui a short boat ride takes you to Koh Phangan, famous for the Full Moon Party on Haad Rin but much more interesting than that reputation. The north and the west of the island are quiet, with yoga retreats, small bays and long stretches of empty sand. If the party is your goal, expect crowds, noise and a night you will not forget; if it is not, check the lunar calendar and plan your stay to miss it. Beyond Phangan lies Koh Tao, the diving capital of the Gulf, where a large share of the world's entry-level scuba certificates are issued every year. The waters are warm and calm, and the dive schools are plentiful. Choose your school on its instructors and group sizes rather than just on price.
Between Samui and Phangan sits Ang Thong National Marine Park, a cluster of around forty limestone islands that you can visit on a day trip. It is quieter than Phang Nga Bay and, in my experience, noticeably less crowded, with a viewpoint hike on Koh Wua Talap and kayaking around the emerald lake. The park closes during the roughest weather, so, as always, ask before you book.
How to move between the islands
The thing that surprises first-timers is how much of an island-hopping trip is spent on a pier. Ferries are frequent in the high season and thin out when the weather turns, and the timetable you saw online last month may not be the one running when you arrive. Book the long legs, and keep the short ones loose. The table below is a rough map of the common connections. Durations and frequency vary by operator and season, so treat the times as ballpark rather than gospel.
| Route | How | Rough time | Notes |
|---|---|---|---|
| Phuket to Phi Phi | Ferry or speedboat from Rassada pier | About 1.5 to 2 hours by ferry | Several departures a day in season |
| Phi Phi to Krabi (Ao Nang or Klong Jilad) | Ferry | About 1.5 to 2 hours | Check which pier your ferry uses before you arrange a hotel transfer |
| Phi Phi to Koh Lanta | Ferry | About 1.5 to 2 hours | Seasonal, usually stops in the rainy months |
| Krabi town to Railay | Longtail from Ao Nang or Krabi pier | 15 to 45 minutes | Boats leave when they fill; tides affect the landing |
| Samui to Phangan | Ferry or speedboat | 30 minutes to 1 hour | Frequent daily service |
| Phangan to Tao | Ferry or catamaran | About 1 to 1.5 hours | Rougher seas in the wetter months |
| Andaman side to Gulf side | Fly via Bangkok, or combined bus and boat | Most of a day | Treat it as a travel day, not an add-on |
A few habits make the pier days smoother. Arrive thirty minutes before the departure listed, because the check-in counters at the busiest piers are chaotic. Keep your valuables in your carry-on and not in the pile of bags stacked on the deck. Take motion-sickness tablets if you are even slightly prone, since a small speedboat in a swell is a very different experience from a ferry. And never plan an important flight on the same day as a sea crossing. If the weather closes the route, you will be rebooking from a pier with patchy signal, and that is no way to start an airport morning.
What it costs
Thailand is cheaper than Singapore on nearly every line, but island prices run above mainland prices, and the gap widens in peak season. The table below uses approximate ranges for a mid-range traveller and converts loosely to Singapore dollars. Rates move, so use these to size a budget rather than to quote a final cost. Our own travel notes put a typical per-person daily spend at roughly THB 1,500 to 5,000, which is the span between a careful backpacker and someone comfortable in a nice resort.
| Item | Budget | Mid-range | Comfortable |
|---|---|---|---|
| Room per night | S$25 to S$45 | S$60 to S$130 | S$180 and up |
| Meals per day | S$10 to S$20 | S$25 to S$50 | S$60 and up |
| Inter-island ferry leg | S$10 to S$20 | S$15 to S$30 | Private boat, quoted per trip |
| Day tour (shared boat) | S$30 to S$50 | S$60 to S$100 | Private charter, S$200 and up |
| Local transport per day | S$5 to S$10 | S$15 to S$30 | Private driver, S$60 and up |
Where trips go over budget is rarely the room or the food. It is the small extras that stack: beach-club minimums, marine park fees paid in cash, taxis quoting tourist prices, and drinks bought on a boat that did not seem expensive until the bill came. Carry baht in small notes, because many pier ticket booths and national park counters will not break a large note and some do not take cards at all.
Staying connected without a surprise roaming bill
Mobile signal across the islands is better than you might fear, though patchy in the more remote bays and on the water. I would not rely on a hotel Wi-Fi network when you need maps, ride-hailing and ferry confirmations, so sort data before you fly. An eSIM is the simplest route for most travellers, because you can install it at home and it switches on when you land. Several options sit in our catalogue. The Airalo Thailand eSIM package starts from S$4.53, and the Commbitz Thailand eSIM from S$7.00. If you want a plan with unlimited data for a longer trip, the Voyafly unlimited 4G/5G eSIM from S$12.45 is worth a look alongside the others.
Read each plan's coverage and validity before buying. Some are data only, some include a number for calls, and the day count starts at different points. Check that your phone is unlocked and supports eSIM, and install the profile on Wi-Fi before leaving home, since you will need an internet connection to download it.
Add a Bangkok bookend
Most trips pass through Bangkok at one end or the other, and a night or two there balances the beach time nicely. The city's temples are a short ride from each other, and the combination of the Grand Palace, Wat Pho and Wat Arun is the standard first-day plan. The guided Grand Palace, Wat Pho and Wat Arun tour starts from S$22.00. Dress properly: shoulders and knees covered, and no sleeveless tops or short shorts, or the palace guards will turn you away at the gate. Our local customs notes say it plainly, and they enforce it.
If you have a spare day and want to get out of the city, Ayutthaya is the usual choice. The ancient capital's brick ruins and the royal summer palace at Bang Pa-In are an easy day from Bangkok, and the Ayutthaya and Bang Pa-In river cruise day trip includes the round-trip city-centre transfer and starts from S$96.85. For a lighter evening, a Chao Phraya dinner cruise like the River Star Princess from S$36.33 puts the lit-up temples on the water at your elbow without any effort on your part.
One more food tip, since Bangkok is where this matters most. Street food is the point, and an evening guided tour is a good way to learn what to order. The Bangkok street food tour by tuk tuk from S$68.01 covers a lot of ground in four hours, and you finish knowing what to point at for the rest of the trip.
Three ways to put it together
People often ask for a ready-made route, so here are three that I have seen work. None of them is clever. They simply respect the travel time between places, which is the thing that goes wrong most often.
| Trip | Route | Who it suits |
|---|---|---|
| 5 days, Andaman starter | 2 nights Phuket (old town, a yacht or Phang Nga day), 2 nights Ao Nang or Railay, then fly home from Krabi | First-timers and long weekends with a tight leave allowance |
| 8 days, Andaman loop | 2 Phuket, 2 Phi Phi, 2 Railay or Ao Nang, 2 Koh Lanta, then fly home from Krabi | Couples and friends wanting variety without a rush |
| 10 days, Gulf and Bangkok | 2 Bangkok, 4 Samui, 2 Phangan, 2 Tao, then back via the mainland | Divers, slower travellers and anyone travelling in the middle of the year |
Notice that none of these tries to touch more than three or four bases. Every extra move costs half a day once you count the hotel checkout, the pier, the crossing and the check-in at the other end. I now plan on one move for every three nights at most, and I am happier for it.
Looking after the places you came to see
Thailand's marine parks have been under pressure from visitor numbers for years, and the closures at places like Maya Bay were a direct response. You can help in small ways. Do not touch or stand on coral. Take your rubbish back with you, including the little plastic wrappers from boat snacks. Say no to single-use plastic bags and straws where you can, and carry a refillable bottle. Keep your distance from turtles and sharks and never accept a chance to hold a wild animal for a photo. Choose boat operators who brief you on reef etiquette at the start of the trip, and skip any that stop the boat on top of coral to let people swim.
On the cultural side, the basics apply on the islands as much as in Bangkok. Cover up when you go into a temple, take your shoes off at the door, and never point your feet at a Buddha image or touch a person's head. Show respect to the Thai royal family in anything you say or post, because insulting the monarchy is a serious offence under Thai law. Wear a shirt away from the beach, since walking through a village in swimwear comes across as rude.
Packing for the water
Pack light, but pack for water. Our own checklist covers sunscreen, a hat, insect repellent, swimwear, comfortable shoes and a power bank, and I would add a few things. A small dry bag for boat days. Water shoes for rocky beaches and pier landings. A light rain jacket, because even in the dry months a short, sharp shower is possible. Any prescription medication in its original packaging, plus basic motion-sickness tablets and rehydration salts. And a photocopy or phone picture of your passport and insurance policy, kept separately from the originals.
Take travel insurance seriously for this kind of trip. Boat days, scooters and water sports are exactly the activities that a basic policy may exclude, and the nearest hospital with good facilities can be a long way off on a smaller island. Read the exclusions around watersports and motorbike use, and save the tourist police number, 1155, along with the general emergency numbers 191 for police and 1669 for ambulance, in your phone before you go.
Frequently asked questions
How many days do I need for island hopping in Thailand?
Five days is enough for a rewarding taste of the Andaman side, with two bases and a couple of boat days. A week to ten days lets you add Phi Phi, Railay and Koh Lanta without feeling hurried. Anything shorter than four days and I would stay on one island and take day trips instead of moving.
Is it better to go to the Andaman side or the Gulf side?
It depends on the month. Roughly speaking, the Andaman side is at its best from November to April, and the Gulf side does better in the middle of the year. If you can pick your dates, choose the coast to match them rather than the other way around.
Do Singapore passport holders need a visa for Thailand?
Singapore passport holders have generally been able to enter for tourism without a visa for a short stay, with a digital arrival card required before travel. Rules and permitted stay lengths change, so confirm the current position on our visa requirements page and the official Thai immigration site before you book.
Can I get proof of onward travel without buying a ticket I might change?
If an application or check asks for proof of an outbound flight, a dated reservation can serve for that purpose. Our flight reservation service provides one. It is a reservation rather than an issued ticket, so book your actual flight separately once your dates are confirmed.
Is island hopping in Thailand safe for families with young children?
Yes, with sensible choices. Pick beaches with lifeguards and calm water, avoid the monsoon months for sea crossings, and check that boat operators supply child-sized life jackets. Larger ferries and catamarans are steadier than speedboats for small children. Kata, Karon and Lamai are popular with families for their gentle beaches and abundant facilities.
Should I book tours in advance or on the day?
For popular day trips in peak season, book ahead, because the better boats and the smaller groups fill first. In the quieter months you can often arrange things after you arrive, which lets you pick a good-weather day. Whichever you choose, read the inclusions, particularly national park fees, which are sometimes paid separately.
What should I do about mobile data on the islands?
Install a Thailand eSIM before you leave Singapore, check that your phone is unlocked, and keep offline maps downloaded as a backup for the stretches of coastline where signal drops. Compare coverage, data limits and validity across the plans on offer.
What happens if bad weather cancels my boat?
Operators generally suspend crossings and tours when the sea is unsafe. Keep a buffer day before any flight home, ask your hotel to help rebook the crossing, and read the terms of your tour booking so you know what the operator offers if a trip is called off.
Featured experiences in this guide
Ready to plan your Thai island trip?
Start with the pieces that are easiest to sort from home: check your entry requirements on our visa requirements page, get a dated outbound reservation with our flight reservation service if your paperwork asks for one, and book your yacht day, airport transfer and eSIM through HolidaySG. Our team approves each booking and e-tickets are emailed once it is confirmed. Then leave the middle of your itinerary open, and let the weather and your own curiosity fill in the rest.