Planning a trip to Koh Samui can feel complicated: between the beaches, the different areas and the boat trips, there is a lot to choose from. This guide pulls together everything you need to arrive prepared, in a clear and practical order. Koh Samui is Thailand’s second largest island, in the Gulf of Thailand, and it covers a bit of everything: white sand beaches, nightlife, quiet corners and boat trips worth planning a whole day around.
📍 Information updated in June 2026, gathered on the ground by our team living and working in Thailand.
Table of contents❯
Koh Samui at a Glance: The Key Facts
The Basics
- Size: 228.7 km² (Thailand’s second largest island after Phuket)
- Population: around 70,000 residents
- Province: Surat Thani, Gulf of Thailand
- Nearby airports: Koh Samui Airport (USM); Surat Thani Airport (URT, on the mainland)
- Main airport: Koh Samui Airport (USM), run by Bangkok Airways
A Little History
For centuries Koh Samui was an island of fishermen and coconut farmers: even today, palm plantations cover most of the interior. It shows up on 17th-century Chinese maps under the name “Pulo Cornam”. Tourism only really arrived in the 1980s, which is why Samui still has an authentic side alongside the big resorts.
Why Choose Koh Samui for Your Trip?
Koh Samui is the right pick if you want comfort without giving up the tropics. Unlike the wilder islands, it has an international airport, hospitals, supermarkets, restaurants of every kind and a ring road (roughly 55 km) that links all the beaches. It also makes a good base for the islands nearby: Koh Phangan, Koh Tao and the Ang Thong marine park.
What Our Team Sees on the Ground
Working with travelers every day, our team suggests Koh Samui more often than any other island to people visiting Thailand for the first time: it balances comfort with a place that still feels real. Anyone worried about crowds usually changes their mind fast, because a few kilometers north or west is enough to find quiet bays and fishing villages.
When to Go to Koh Samui: Weather and Best Time
The best time to visit Koh Samui runs from December to April, with clear skies and a calm sea. The island does not follow the same calendar as the rest of Thailand: the wet season lands at the end of the year, between October and December, peaking in November. Weather data checked in June 2026.
Cool and Dry
Hot
Rainy
Koh Samui: The Island to Pick for Thailand in August
Between June and September there is a shoulder season: it is hot, with short afternoon downpours, but Samui stays drier than the Andaman coast. That makes it a solid pick for a summer holiday, August included, with good value for money.
Disclaimer: weather patterns can shift a little from one year to the next.
A Tip From the Team
If you can, steer clear of the second half of November and the first half of December: that is when the rain is most persistent and boat connections to the islands nearby can be canceled. If those are your dates, pick a resort with an indoor pool or generous common areas.
Quick Guide: Beaches, Things to Do, Where to Stay and Practical Tips
This is the fast overview of the main topics. Each one has its own in-depth guide, linked below.
Which Area or Beach Should You Choose in Koh Samui?
Every coast of Koh Samui has its own character, from the liveliest to the most secluded.
The best known and liveliest beach, the one to pick for services, bars and nightlife.
Calmer than Chaweng, good for families and couples, and home to the Hin Ta and Hin Yai rocks.
The area with the most charm: dinner, atmosphere and sunsets.
The most laid-back and the cheapest, ideal if you want peace and a beachfront bungalow.
How Many Days You Need, and Sample Itineraries
To enjoy Koh Samui properly, plan on at least 4 nights and 5 days: time to relax on the beach and set aside a full day for a boat trip.
Express
- Beach time (2 days)
- One boat trip
- Island loop and the Big Buddha
The Essentials
- Chaweng/Lamai beaches (2–3 days)
- Ang Thong (1 day)
- Island loop and waterfalls (1 day)
The Full Week
- Beaches and downtime (3 days)
- Ang Thong (1 day)
- Koh Phangan or Koh Tao (1 day)
- Inland and culture (2 days)
Things to Do and See in Koh Samui
On land, the sights not to miss are the Big Buddha (Wat Phra Yai), Wat Plai Laem, the Na Muang waterfalls and the Fisherman’s Village in Bophut. Boat trips to the islands nearby are covered in our day trips guide.
Where to Stay in Koh Samui?
The base you pick depends on the pace you want: Chaweng for services, Lamai and Choeng Mon for families, Bophut for charm, Maenam for a smaller budget. Among the well-known names: Four Seasons (Laem Yai), Banyan Tree (Lamai), SALA Samui (Choeng Mon).
Getting Around: Public Transport, Taxis and Tuk-Tuks
The cheapest way around is the songthaew, the shared pick-up truck that runs along the ring road from about 50 baht a ride. For convenience, the Grab app is almost always better value than a regular taxi, which on Samui asks a high fare. A scooter (around 200 baht a day) gives you the most freedom, but the island has a high accident rate: rent one only if you already ride, with a helmet and insurance.
5 Mistakes to Avoid on a First Trip to Koh Samui
Traveling in November without checking first
It is the wettest month. December to April is the safer window, or pick a resort with good covered space.
Renting a scooter with no experience
Hilly roads and traffic make a scooter risky here. Without practice, use Grab or a car with insurance.
Underestimating the distances
The ring road is about 55 km long. Pick your base around what you actually plan to do.
Booking Chaweng and expecting quiet
Chaweng is beautiful but noisy after dark. For calm, Maenam, Lipa Noi or Choeng Mon are the better call.
Animal attractions that are not ethical
Skip anywhere that offers elephant riding. Ethical sanctuaries are the right choice.
How Much Does a Trip to Koh Samui Cost? Budget and Prices
Koh Samui is one of the pricier Thai islands, but it stays affordable by Western standards. Below is a realistic estimate of what you spend a day per person, flights excluded. Rates checked in June 2026.
A few useful figures: entry to the Ang Thong Marine Park is 300 baht a head, a scooter runs around 200 baht a day and a meal in a good local restaurant is about 500 baht. It is worth carrying a card with no foreign transaction fee (Wise or Revolut, for example), because many ATMs here charge a steep withdrawal fee.
- Hostel/guesthouse€20–40
- Street food€2–4
- Songthaew~€1.5
- Mid-range hotel€80–120
- Restaurant~€14
- One boat trip€30–50
- High-end resort€140+
- Fine dining€40+
- Private transfers€20–40
Frequently Asked Questions (FAQ)
When is the best time to visit Koh Samui?
The best window runs from December to April, when the skies are clear and the sea is calm. January and February have the finest weather but are the busiest and most expensive months. July and August work well too, because Samui stays drier than the rest of Thailand in summer. The month to skip, if you can, is November, the wettest of the year.
How many days do you need in Koh Samui?
Plan on at least 4 nights and 5 days, enough to enjoy the beaches and set aside a full day for a boat trip. With a whole week you can add Koh Phangan or Koh Tao, or head inland for waterfalls and viewpoints, without feeling rushed.
How do you get to Koh Samui?
No long-haul flight lands on the island. The easiest route is a connection in Bangkok and then a short domestic flight (about an hour) to Koh Samui Airport, operated by Bangkok Airways. A cheaper alternative is to fly to Surat Thani and carry on by bus and ferry.
Is Koh Samui good for families with children?
Yes. The beaches at Choeng Mon, Lipa Noi and Lamai have calm, shallow water for younger children, and the island has hospitals, pharmacies and well-stocked supermarkets. Many resorts run pools, kids' clubs and family rooms, which makes the planning easier than on a remote island.
Koh Samui or Phuket?
It depends what you want. Phuket is bigger and busier; Koh Samui is smaller, more relaxed and strong on boutique resorts. One advantage of Samui is the weather: in summer it tends to be sunnier than Phuket, because it sits outside the same monsoon. For a first tropical vacation that is comfortable and easy to arrange, Samui often wins.
Do you need to rent a scooter to get around?
No, it is not essential. Songthaews (shared pick-up trucks) and the Grab app cover most journeys, and Grab often beats a taxi on price. A scooter gives you more freedom, but the island has a high accident rate: ride only if you have experience, always with a helmet and insurance.
In Short
Koh Samui is the most balanced Thai island for a first tropical vacation: beaches for every taste, temples and waterfalls to see, and plenty to do by boat and on land. The best time to visit runs from December to April, though the summer stays sunny. Five to seven days is enough to combine downtime, the island sights (Big Buddha, Na Muang, Fisherman’s Village) and at least one boat trip, picking the right base between Chaweng, Lamai, Bophut and Maenam. On an average budget of around €70 a day you can take the island in comfort.