This post contains affiliate links. If you make a purchase through them, we may earn a small commission at no extra cost to you. As an Amazon Associate, we earn from qualifying purchases.
The old version of this article called nine of these islands “hidden.” I have now looked into this properly, and I would like to formally withdraw that word. Koh Phangan hosts one of the most famous beach parties on the planet. It has been discovered rather thoroughly, by several hundred thousand people, most of them holding a bucket.
So this is a different kind of article, and a useful companion to the wider Thailand solo travel guide. Instead of a tidy list of nine mysterious islands, I have grouped what is actually out there near Samui into honest categories: islands you reach by scheduled ferry, a southern half day circuit, the forty two islands that make up Ang Thong Marine Park, and a handful of private charter curiosities that most brochures lump in alongside Koh Phangan as though the logistics were remotely comparable. They are not.
I have spent enough time based on Samui itself to have opinions about hotels, hostels and the general rhythm of the place’s daily life. The boat trips below are ones I have researched properly rather than all personally ticked off, so I have written them as an honest planning guide rather than pretending to a level of first hand experience I do not have. Where I know something from being on Samui itself, I have said so.
Getting the Logistics Right First
The thing I had not fully appreciated before looking into this is how much the departure pier matters. Lomprayah alone uses more than one pier around Koh Samui depending on the route and the season, so choosing the sailing from the pier nearest your hotel can save considerably more time than choosing the boat with the shortest crossing on paper. A twenty minute ferry stops being impressive after an hour in a taxi heading the wrong way around the island. Always check which pier your specific sailing uses when booking, not just the destination.
I would also arrive earlier than feels strictly necessary. Ferry check in is usually straightforward, but the baggage collection at the other end can turn into a scrum in which twenty people simultaneously become convinced that the same black wheelie case belongs to them.
Keep your medication, electronics, passport and anything irreplaceable in a small waterproof bag beside you rather than in the hold, and make sure your travel insurance actually covers water activities before you book anything. In November 2025, a ferry travelling between Koh Tao and Koh Samui hit rough seas and lost a quantity of unsecured luggage from an upper deck, with passengers watching their own suitcases float away across the water. Nobody was hurt, and one affected traveller was eventually compensated, but it is exactly the sort of story that improves a person’s packing habits permanently. Take it as a nudge to keep the essentials on your person, not as a reason to avoid ferries altogether.
A quick practical note on prices, hours and fees throughout this guide: these were correct at the time of writing, but Thai island entry fees and opening times have a habit of drifting, so it is always worth a quick check before you book.
Koh Phangan, the Easy Escape With a Reputation Problem
Koh Phangan is the obvious neighbour, and depending on which pier and boat you use, the crossing can take anywhere from about twenty minutes to a full hour. That is short enough for a comfortable day trip and long enough for the passenger beside you to unwrap a genuinely alarming egg sandwich.
I have written about Koh Phangan properly elsewhere, including a full solo travel guide to the island and an honest look at its yoga scene before booking a single class, so I will not repeat all of that here. What is worth saying in the context of a day trip from Samui is that Haad Rin is not the whole island, as I found when comparing the two islands properly in Koh Samui and Koh Phangan: Notes From a Man Who Refuses to Pick a Favourite. Thong Nai Pan, Haad Yao, Haad Salad and the Koh Ma sandbar show a calmer side that seems faintly embarrassed by the neon reputation.
Doing Koh Phangan Independently, or Not
An independent day trip looks simple on the ferry timetable. The complicated part starts after you arrive at Thong Sala. Shared songthaews may wait until they have enough passengers to bother moving, while a private taxi to a further beach can cost considerably more than the ferry itself. I read one account from a solo traveller who paid 900 baht for a taxi from Thong Sala to Thong Nai Pan simply because waiting for other passengers was eating the whole day, which is exactly the sort of detail glossy guides tend to leave out while describing the beach as effortlessly accessible.
If I wanted to see several beaches without hiring a scooter myself, I would book a driver or island road tour in advance instead. Travellers who have done this consistently mention being able to see a proper spread of beaches, eat lunch and get in the water without spending the day negotiating steep roads and discovering exactly how little protection a rented helmet actually offers.
Thong Sala itself is worth a mention too, since it is usually treated as somewhere to escape from rather than a destination. There are cafes, food stalls and shops within easy walking distance of the pier, which makes it a perfectly reasonable base for a gentler day rather than an attempt to conquer the whole island before the last ferry back.
If You Stay for Full Moon
I would stay overnight for the Full Moon Party rather than rely on getting back the same night. Dedicated speedboats do run between Haad Rin and Samui, sometimes with several return sailings, but reports of crowded boats and delayed hotel transfers suggest the return journey can become its own event. The upside of a Full Moon speedboat package is not needing to find transport at three in the morning. The downside is sharing a small boat with people who have spent six hours drinking from a bucket and have only just rediscovered the concept of the sea.
Koh Tao and Koh Nang Yuan, Worth It if You Budget the Whole Day
Koh Tao is reachable from Samui by scheduled high speed catamaran and slower conventional boats, but I would resist calling it a relaxed independent day trip. Crossings from Nathon Pier currently run from around ninety minutes on the direct high speed service to three hours or more on a ferry plus speedboat combination, depending on operator and route. That is a genuinely impressive amount of ferry for what ends up being a fairly small amount of actual island time if you are trying to do it there and back in a day.
If it were me, I would give Koh Tao at least two nights rather than squeeze it into a single long day. That leaves time for Shark Bay, Aow Leuk, Sairee Beach, an actual snorkelling trip and one entirely unproductive afternoon, which is often the part travellers remember most fondly. I have written a full guide to Koh Tao for anyone planning that longer stay properly.
The recurring praise for Koh Tao and Koh Nang Yuan day tours (worth knowing about if you are weighing up where to base yourself on Samui first) centres on clear water, plenty of fish, helpful crews and lunches that turn out better than expected. The recurring complaints are just as consistent: very early pickups, loud speedboat engines, crowded stops, and the sense that each snorkelling session ends right as everyone gets comfortable. Earplugs are not a ridiculous thing to bring on a speedboat. One reviewer specifically recommended them for anyone sitting near the outboard engines, since apparently paradise can sound remarkably like a building site.
The crossing itself can be beautifully calm or a proper test of character depending entirely on wind and sea conditions that day, regardless of which operator you book. Take seasickness tablets in advance if you are at all prone to it, choose a morning departure where the schedule allows, and do not eat a large fried breakfast immediately before boarding a high speed catamaran. Some travel lessons genuinely do not need to be learned through personal experimentation.
Koh Nang Yuan’s Fee, Hours and the Famous Queue
Koh Nang Yuan is normally visited as part of a Koh Tao tour or by longtail boat from Koh Tao itself, rather than as a simple little island sitting conveniently near Samui. Treat it as a full day involving a substantial outward journey, not a quick add on.
The current entrance fee is 250 baht, and outside plastic bottles are generally not allowed on the island, so a reusable bottle is more useful than turning up with six disposable ones and the general demeanour of a baffled smuggler. Opening hours are typically mid morning to late afternoon, though it is worth checking on the day since these things do shift.
The viewpoint is genuinely beautiful, but the final photo spot can develop a queue of people waiting patiently for their turn to look accidentally contemplative. I would take the first clear view rather than wait indefinitely for the exact boulder Instagram has decided is correct. The climb itself involves steep steps, real heat and a short scramble near the top, and it can be skipped entirely without ruining the day. The beach and the sheltered water either side remain available to anyone whose knees have quietly filed an objection.
The Southern Circuit: Koh Madsum, Koh Tan and Koh Rap
Koh Madsum, Koh Tan and Koh Rap form the most practical southern island circuit, usually reached by longtail or speedboat from around Thong Krut with far less open water travelling than a trip to Koh Tao or Ang Thong. A half day boat trip out here leaves time to get back, shower, eat properly and spend the evening quietly congratulating yourself on having been unusually active.
Koh Madsum, Better Known as Pig Island
You will see this one spelled Madsum, Matsum, Mat Sum and Mudsum, which is unhelpful, though Pig Island is easier for everyone. It does sound like the title of a fairly grim reality programme.
The crossing can take as little as fifteen or twenty minutes by speedboat, with longtails taking a little longer, which makes it one of the more forgiving options if you are prone to seasickness. The strongest piece of advice I found was simply to go early. Private boat passengers who arrived before the group tours reported a quieter beach and a more relaxed time with the pigs, while later arrivals found a considerably busier operation. Carry a small amount of cash too, since the 50 baht island fee is not always included in the tour price.
The pigs are undeniably unusual and not, on their own, the whole island. There is a long beach, warm shallow water, kayaks and basic refreshments, which is enough to enjoy even once the novelty of watching a pig paddle has worn off. Impressions online are genuinely mixed. Some visitors describe the animals as well looked after and the beach as enormous fun, others mention smells, rubbish and an atmosphere that gets less charming once several boats arrive at once. I would rather pass on both sides of that honestly than pretend it is uniformly wonderful. Watch, laugh, take a photo if the pig continues to ignore you, and resist staging a prolonged photoshoot to prove you met it. A pig eating watermelon is already doing most of the creative work.
Koh Tan, the Quieter Half of the Trip
Koh Tan is usually treated as the supporting act on a Pig Island tour, but it may well be the better reason to go. Its shallow reef, fish, mangroves, small community and generally slower pace feel more like actual island exploration and less like visiting a celebrity farmyard.
Recent visitors repeatedly mention the peaceful atmosphere and simple lunches served near the beach, with several noting they had the island almost to themselves, which is the kind of sentence that makes an introvert start looking for a boat immediately. The snorkelling is not guaranteed to be magnificent every single day; some visitors found abundant fish and coral, others found the water cloudy after poor weather, or shared the site with several other boats. There is also a recurring complaint about rubbish washed onto the less maintained stretches of shore. That does not make the island worthless, but it belongs in an honest account alongside the clear water and the quiet.
Koh Rap, the One Missing From the Old Article
Koh Rap is genuinely the most interesting find in all of this research, and it was not mentioned in the previous version of this guide at all. It is usually combined with Koh Tan and Koh Madsum by private longtail or a smaller organised tour, with swimming, kayaking, snorkelling and a beach barbecue among the usual activities.
It appears to be the better choice if you want a quieter beach and fewer staged attractions, with small group visitors regularly mentioning clear water, a freshly prepared barbecue and noticeably more space than at Pig Island. I would stop short of calling it untouched. An island with organised barbecues, entrance fees and bookable excursions has been touched, it has simply avoided being prodded quite as enthusiastically as its neighbour. Some three island tours charge separate 50 baht fees for both Koh Rap and Koh Madsum, which is a small amount individually but exactly the sort of small amount that becomes irritating when your wallet is buried under a damp towel.
Koh Rap, Koh Tan and Koh Madsum can all fit into one trip, but three stops do not automatically make the tour better. Proper time at two islands beats arriving at three beaches just long enough to take your shoes off and put them back on again.
Joined Tour or Private Longtail
A joined speedboat tour is generally the more sensible option for a solo traveller, since the cost is per person. Private longtails are priced per boat, which is good value for a group and slightly extravagant for one man trying to avoid a group. That said, a private longtail is slower, noisier and more basic than a speedboat, and it gives you real control over the day. Being able to leave Pig Island the moment the crowds arrive and linger longer at Koh Tan appeals to me considerably more than being marched around to a whistle, and splitting the cost between two or three people can turn excessive luxury into merely questionable budgeting.
One thing worth asking directly when booking a private option: what exactly does “private” include. Sometimes it means a private boat on a fixed route, sometimes it means genuine flexibility over departure time and stops. Travel language becomes wonderfully inventive whenever an invoice is involved.
Ang Thong Marine Park: Forty Two Islands, Not One
Ang Thong is not a single island, and that distinction needed to be much clearer than it was in the previous version of this guide. It is a protected archipelago of 42 islands, of which organised tours commonly visit or pass only a handful. There is no regular public ferry for casually hopping between them. Access is through licensed tour operators or a private charter.
Current foreign adult admission is 300 baht, sometimes included in the tour price and sometimes an extra waiting quietly in the small print, so it is worth asking directly. The park generally closes from 1 November to around 15 December each year for the monsoon season, so I would check the exact dates rather than assume every tour advertised online is actually running that week.
Choosing Your Boat: Big Boat, Speedboat or Smaller Yacht
The main choice for an Ang Thong day is a big boat, a speedboat or a smaller yacht. The big boat is slower but offers more stability, shade, space and proper toilets. The speedboat saves travelling time but can be bumpy, loud and wet. I suspect the big boat suits many mature travellers considerably better, particularly anyone who values a proper seat and does not regard spinal compression as an adventure activity in its own right. Reviews consistently praise the shade, refreshments and organisation of the bigger boats, though some passengers felt the larger groups moved through the day rather like a production line.
A smaller yacht or semi private tour costs more but tends to mean fewer passengers, a slower atmosphere and actual help getting in and out of kayaks or snorkelling gear. Paying extra specifically to reduce noise and organised jollity strikes me as a reasonable use of money, possibly even a medical expense.
Koh Wua Talap, the Viewpoint Everyone Photographs
Koh Wua Talap is the park headquarters island and home to the celebrated panoramic viewpoint. The official trail is only about 500 metres, but it is steep, uses ropes for support in places, and can take 25 to 30 minutes, which is a fairly mischievous way to describe a climb. Trainers or proper walking shoes are worth packing specifically for this. Flip flops are excellent for breakfast and poor for hauling an overheated body up limestone while pretending everything is going splendidly.
The viewpoint is entirely optional. Wua Talap also has a beach, visitor facilities, a restaurant, kayaking and a forest trail to a second beach, so staying at sea level for the whole visit is not a moral failure. Basic park bungalows and camping are available for anyone wanting to stay overnight, though the booking system has had outages, so an overnight stay needs more preparation than simply turning up with a toothbrush and an adventurous expression.
Koh Mae Ko and the Emerald Lake
Koh Mae Ko is a separate island from Wua Talap, despite a surprising number of commercial guides muddling the two with great confidence. This is the island with Thale Nai, the enclosed emerald saltwater lake most Ang Thong photographs are actually of.
The climb to the viewpoint over the lake is shorter than the Wua Talap trail but still involves steep steps and real heat, so take it slowly, carry water, and do not take it personally when a seven year old overtakes you in beach sandals. Swimming in the lake itself is not permitted, the attraction is the elevated view down into it, and nature has sensibly declined to install a swim up bar. Kayaking around Mae Ko’s cliffs and coves gets some of the strongest feedback of anything in the park, offering the dramatic scenery without requiring the higher Wua Talap climb, although getting gracefully out of a kayak remains its own separate branch of physics.
Koh Sam Sao, Koh Wao and Koh Phaluai
A few smaller stops deserve an honest mention rather than a blanket promise that every tour reaches them. Koh Sam Sao has beaches, reef, kayaking, a natural stone arch and a very basic camping area, though many standard tours do not stop there at all, and it has no shops or restaurant, with campsite showers depending on rainwater that may simply not be available. Koh Wao turns up as a snorkelling stop on some speedboat and smaller yacht itineraries, with reports ranging from clear water and fascinating sea caves to disappointing visibility, which is really a matter of judging the whole park rather than letting one cloudy stop ruin the day.
Koh Phaluai is different again, since people actually live there. Some Ang Thong tours stop for lunch near the fishing community, and a small number of simple resorts make an overnight stay possible. I like the idea of Phaluai more as a slow overnight than a hurried buffet stop, though reports are mixed: some guests praise the isolation, scenery and fresh seafood, others mention basic facilities and unreliable transfers. Reaching it independently from Samui is not as simple as boarding a scheduled tourist ferry, and if staying overnight, I would want the return transfer confirmed before leaving Samui. “There will probably be a boat” is a lovely sentiment right up until you have a flight to catch.
Private Charter Curiosities: Five Islands, Koh Som and Koh Mat Lang
These three do not belong beside Koh Phangan as though the transport arrangements are remotely comparable. None have a public ferry, and all three sit firmly in private charter territory.
The Five Islands off Taling Ngam, known locally as Koh Si Koh Ha, are better understood as a scenic boat route than five separate beach visits. The name translates roughly as “four islands, five islands,” because one is hidden behind another depending on the angle, which is a numerical puzzle before lunch that only Thailand could produce. The islands contain swift nest harvesting sites and simple cliffside structures used by their custodians, so I would treat them as places to observe from the water rather than assume every patch of land welcomes a picnic and a drone. A private sunset longtail around them can take roughly two hours from the Taling Ngam area, which appeals to me considerably more than a packed full day itinerary. A quiet boat, the western light, and no enforced kayaking enthusiasm.
Koh Som sits close to Samui’s northern coast with no regular public ferry, appearing mainly in private yacht itineraries, half day charters and sunset cruises. I would treat it as a niche option rather than an essential excursion, since its strength is proximity and privacy and its weakness is that the cost of a private boat can outweigh the amount of actual island activity waiting for you. A sunset cruise passing Big Buddha and Koh Som may be a more satisfying use of an evening than trying to turn Koh Som into a full sightseeing day. Sometimes the best use of a small island is to sit offshore with something cold and watch the light change.
Koh Mat Lang sits close to Chaweng and turns up in private fishing, catamaran and kayaking itineraries, again without a public ferry. Some experienced paddlers kayak out there at first light, but I would not casually suggest a solo open water crossing to a general reader. Currents, wind and boat traffic are all still present even when an island looks deceptively close, and the sea has never once agreed to scale itself helpfully.
What I’d Actually Pack and Check Before Booking
A few practical habits keep coming up across every one of these trips, regardless of which islands end up on the itinerary. Test your snorkel mask before the boat leaves rather than discovering mid reef that it fills with seawater every time you breathe (see my travel gadgets guide for what I actually pack). Bring water shoes, since beaches can hide broken coral, sharp stones and the occasional sea urchin, and boat ladders have a habit of turning slippery exactly when everyone is watching. A dry bag or waterproof pouch for your phone and valuables earns its keep on every single one of these trips.
Shade matters to me more now than it did twenty years ago. Before booking, I would look at covered seating, toilet availability, ease of boarding, group size and how much recovery time is allowed between activities, all of which tell you more than counting how many times a tour description uses the word paradise. I would also avoid any tour that feeds fish to manufacture a better snorkelling display. It may improve the photograph, but it interferes with natural behaviour and turns conservation into underwater catering.
One more thing worth asking every operator directly: request the actual itinerary for that specific day, not just the list of places that appear somewhere on the sales page. Reviews across nearly every one of these tours mention fewer stops than advertised, changed snorkelling locations or activities dropped because of tide and weather. That flexibility is entirely reasonable at sea. Pretending the change never happened is less so, and the better operators are the ones who explain why the itinerary shifted instead of quietly hoping nobody noticed Koh Wao got dropped.
Hotel transfers are also worth factoring into the advertised duration. A short boat journey from Thong Krut can be preceded by a long shared minivan ride from Chaweng, during which Samui reveals exactly how large an island it becomes before breakfast. A “four hour tour” can quietly occupy seven hours once twelve hotel pickups, two piers and one inexplicably absent passenger have all been folded in.
My Honest Shortlist
If I only had one free day, I would choose Ang Thong. It offers the strongest sense of having travelled somewhere genuinely different from anything on Samui itself. If snorkelling mattered more to me than scenery, I would choose Koh Tao and Koh Nang Yuan instead, and give it the whole day it actually needs. For a gentler half day, Koh Tan and Koh Madsum make an easy, uncomplicated pairing. For quiet, Koh Rap is currently my pick, whether the tour operators realise that is their real selling point or not.
If I had three spare days rather than one, I would not book three separate excursions. I would take the ferry to Koh Phangan and simply stay there, since island hopping does not have to mean returning to the same hotel bed every single night. Sometimes moving accommodation once produces less actual travelling than repeatedly doing twelve hour tours from a single base.
And if the forecast looks genuinely bad on the day, the honest answer is to stay on Samui, find a cafe, order a coffee and watch the rain. The islands will still be there tomorrow, and they will very likely look considerably better once you are no longer approaching them sideways in a speedboat.
Booking These Trips
Most of the tours above are bookable through the usual Thailand tour platforms, and comparing a few listings against each other is worth the ten minutes it takes, since itinerary, boat size and group size vary considerably for a similar price. I use Viator for browsing and booking day tours in Thailand, and 12Go for ferry tickets between the islands themselves.
Islands Near Koh Samui: Quick Answers
Do I need to book Ang Thong Marine Park in advance?
Yes. There is no public ferry hopping between the islands, so access is through a licensed tour operator or a private charter, and popular sailings can fill up in high season. Booking a few days ahead is sensible, and worth double checking against the park’s November to mid December closure before you commit to dates.
Is Koh Tao worth it as a day trip from Samui?
Only if you are comfortable with a long day. The crossing alone can run from around ninety minutes to three hours or more depending on operator and route, which leaves a fairly modest amount of actual time on the island once you account for the return journey. If snorkelling is the priority, staying at least two nights makes far better use of the travel involved.
What is the entrance fee at Koh Nang Yuan?
250 baht per person at the time of writing, with outside plastic bottles generally not permitted. It is usually visited as part of a Koh Tao tour or by longtail from Koh Tao itself, rather than as a standalone trip from Samui.
Is visiting Pig Island ethical?
Opinions online are genuinely mixed, and I think that is the honest answer rather than a firm yes or no. Some visitors describe well cared for animals and a genuinely fun beach, others mention rubbish and an atmosphere that declines once several boats arrive together. If you go, arriving early, not chasing the animals for a photograph and watching rather than forcing interaction all make a difference.
Which of these islands can I reach without joining a tour?
Koh Phangan and Koh Tao both have scheduled public ferries and can genuinely be done independently. Everything else in this guide, the southern circuit, Ang Thong and the private charter curiosities, requires either a joined tour or a private boat, since none of them have regular public ferry services.
What is the best time of year for Ang Thong?
The park is closed from around 1 November to 15 December each year for the monsoon season, so outside that window is your only real option. Within the open season, calmer sea conditions generally make for a smoother crossing and a better kayaking day, so it is worth checking the weather forecast a day or two out rather than booking blind.
A note on how I write: Every trip starts with a journal, filled in wherever I happen to be; on a bus, plane, train, or in a backstreet cafe that has clearly seen better days. It’s not tidy, and it’s not always legible even to me. When I get the time, I use AI to help turn those notes into something readable, organising drafts and occasionally rescuing a sentence that has wandered off without me. The experiences, the perspective, the humour and every editorial decision remain entirely mine. As for the photos, I’m not remotely fond of having my picture taken, family portraits included, so I also use AI to help visualise the places and moments I write about.
