Updated on March 2, 2026

Koh Samui is a tropical haven located in the Gulf of Thailand that boasts many lovely characteristics and qualities that once visited; one cannot help but fall in love with. Among the many islands in Thailand, it’s one of the most well-known destinations.

By now you may be familiar with the allure of Koh Samui as one of Thailand’s premier vacation destinations. The island has come a long way from being a backpacker’s paradise, offering not just luxury accommodations but also a wide range of tourist-friendly activities and attractions for every visitor to enjoy.

Still, there are some things that even guests at the most lavish private villas on Koh Samui need to remember before arriving on the island. Knowing these facts about the island can not only save these guests discomfort, but may also spell the difference between a good trip and an extraordinary one.

1. “Samui” is the Actual Name of the Island

Most likely, only Thais and locals will know that “Samui” is the actual name of the island. The word “Koh” means island in the Thai language that only indicates the status of Samui.

2. The Second Largest Island in Thailand

After only Phuket, Koh Samui ranks second in terms of the size while the third on the list is Koh Chang in Trat province. The island has an area of 228.7 km2 and has a population over 63,000.

3. Keep Voltage in Mind for Electrical Devices

While many villas now offer international plug sockets, it’s still worth remembering that electrical outlets in Thailand can go pretty high on voltage. Any device that runs on a lower voltage, especially hairdryers that run on 110-120 volts, will be damaged when plugged into a 22o-volt outlet. It’s best to leave the low-voltage gadgets at home, and ask for an adaptor when necessary.

5. The Role of Fisheries and Plantations

Before the tourist era, Koh Samui relied on fishery and coconut plantation. The island used to get a nickname as “island of coconuts and monkeys”.  Although these days, visitors still see coconut trees on the hill, there is not much coconut cultivated area left on the island.

6. Privately Owned Airport

Koh Samui has an airport conveniently located on the island with great road access and boutique style terminal areas. This airport belongs to a private company called Bangkok Airways offering daily direct flights to and from Koh Samui. There are daily international flights to many major cities in Asia such as Hong Kong, Singapore, and Kuala Lumpur.

7. Public Transportation Comes with Risks

You will find several choices of transportation on Koh Samui, such as tuktuks, motorcycle riders, and songthaews, but the island itself doesn’t have its own official form of reliable public transportation. Thus, it is recommended that you make arrangements in advance for a car and driver to take you around the island. This ensures that you will arrive safely at your destination, especially if your villa is located in a distant estate or neighborhood.

8. Chaweng is the Heart of the Island

There are many beautiful beaches in Samui, but Chaweng is the most popular and lively beach on the island. Most of the tourist facilities such as accommodation of all types, restaurants, shopping arcade, activities, clubs, bars, and nightlife in Koh Samui are all in the area, making Chaweng the heart of the island.

9. Nathon is the Capital Town of Koh Samui

While Chaweng is the entertainment heart of Koh Samui, Nathon is the capital town. The area hosts the main port where travelers can connect to the mainland and other nearby islands such as Koh Tao and Koh Phan Ngan. Government offices, banks, local markets, and shops can be found in this area too, making Nathon a key district.

4. Access Point to the Marine National Park

With its enviable location, Koh Samui is surrounded by the charming tropical treasures – Ang Thong Marine National Park and many amazing nearby islands that are perfect for a day trip. Vacationers can choose to have a full-day trip to the national marine park to visit the natural wonder or to just have a beautiful view from the island.

10. Koh Samui is Not a Province

The island is big but not enough to win the status of a province, like Phuket. Koh Samui is part of Surat Thani Province, and is also close to Nakhon Si Thammarat Airport. Travelers can travel through both airports in Surat Thani and in Nakhon Si Thammarat. Then take a connecting 1.5-hr ferry to the island.

11. The Language Barrier Still Exists

While some locals can speak basic English to communicate with customers and guests, it’s also recommended to start practicing your basic Thai phrases and greetings for better interactions. You can even ask the in-villa staff members to help you brush up on your Thai language skills to help you learn more about Thai etiquette and culture.

12. Thais Drive on The Left

Another reason why booking a car and driver in advance is recommended for your trip to Koh Samui is due to the fact that Thailand’s motorists drive on the left, which means that the steering wheel is on the right-hand side of the car. This can be a safety risk for those who are not used to driving left, especially when they’re not used to dealing with local motorists.

13. Best Time to Visit

Koh Samui is a year-round destination if one does not mind the drizzling rain during the rainy season. However, during the monsoon time in November, Samui can experience a storm and pouring rain but there is nothing to worry about as the sunshine is still plentiful. It is less humid from Mid-December to February if you wish for cooler weather. But the best time to visit will be from mid-January to August.

14. Two Landmarks in the Island

There are many places to see and activities to do in Koh Samui, but there are two landmarks that stand out. The first marker is Big Buddha that stands tall and elegantly on the hill where one can see it from afar. The second checkpoint on the island is Hin Ta and Hin Yai Rocks. These two peculiar rocks earn its fame due to their shapes that similar to male and female genitalia. Visitors to Koh Samui should never miss taking photos of these landmarks to mark the visit to the island.

15. Mummified Monk at Wat Khunaram

One of the island’s more spiritual — and unusual — attractions lies in Wat Khunaram, one of the must-visit temples in Koh Samui, where the body of Luang Pho Daeng, a monk who passed in 1973, is preserved in a seated position in a glass case. This “mummy monk” serves as a powerful reminder of impermanence and draws both pilgrims and curious visitors.

16. Use a Thai SIM Card for Mobile Access

These days, mobile access is a must for every traveller. Assuming that you have an open-line mobile phone that is not tied down to your home country’s provider, you can easily purchase a SIM card to access mobile calling and data services in Thailand from any convenience store in Koh Samui. Just make sure that the card fits your phone, and don’t forget to top up whenever you can.

17. Bring Your Own Baht

In Koh Samui, the Thai baht is the official currency, just like any other provinces in Thailand, and many stores on the island still take cash. You can find banks and currency exchange counters on the island, but just to be sure that you have enough cash on hand, try to bring your own baht before arriving in Koh Samui, since not all villas are within walking distance of the nearest exchange counters.

18. Bioluminescent Waters

Bioluminescent Waters in Koh Samui
Photo: Bioluminescent Waters in Koh Samui – Expedia

On certain nights, the sea around Koh Samui lights up with a magical glow, thanks to bioluminescent plankton. Kayakers and paddleboarders often head to quieter spots to catch this natural light show — a truly ethereal experience.

19. Tap Water is Not Drinkable

If you’re wondering why your villa gives you complimentary bottled water, the explanation is quite simple: the tap water in Koh Samui is not safe for drinking. For those of you who need to stay hydrated, plan on adding bottled water to your list to stock up on, which you can arrange with the Guest Experience staff prior to your arrival to Koh Samui. That way, you can enjoy your time at the villa without interruptions for water and grocery runs.

20. Hidden Jungle Waterfalls

While the Na Muang Waterfalls are well-known, there are many more secret inland escapes deep in Samui’s jungle. These hidden spots are less trafficked, offering peaceful pools, butterflies, and a serene escape from the beach crowds.

21. Expect Mosquitoes

Insects and warm weather are like best friends, and mosquitoes are among the top insects you will come across in tropical islands like Koh Samui. If you’re going to explore outdoor or rainforest attractions such as the Secret Buddha Garden, mosquito repellent is a must. Ask your villa staff for recommendations on good places to buy tropical-grade mosquito repellent, or bring your own as a preventative measure.

22. The Divisive King of Fruits

Durian trees thrive on the island, but the fruit’s notoriously strong odor means it’s often banned in hotels. Though you’ll find durian growing wild in the hills, many luxury accommodations explicitly restrict it.

23. Spiritual Garden Situated High in the Hills

Nestled in the hills above Samui is the Secret Buddha Garden, a quiet sanctuary filled with statues, lush foliage, and peaceful viewpoints. It’s the kind of place that feels removed from time — perfect for reflection, meditation, and absorbing the island’s quieter side.

An Island of Endless Discoveries

Being informed is the first step toward making your trip to Koh Samui a safe and rewarding one. Knowing the important facts for travelers can guarantee more than just a good time—it can save a lot of time and money that can go toward the most enjoyable parts of the trip.

The most important part of every trip is the memories that you and your loved ones can make during your stay on Koh Samui. If you have any questions about the island, feel free to ask your villa’s Guest Experience Services staff prior to your arrival. They can give tips and guide you toward activities that can make the biggest difference to your Koh Samui stay.

Overall, Koh Samui is more than just a tropical paradise with sun-soaked beaches and turquoise waters — it is a vibrant island rich in history, culture, and hidden surprises. From its origins as a humble fishing and coconut-growing community to becoming a luxury destination, the island offers a unique blend of tradition and modernity. Visitors can explore spiritual landmarks like the Secret Buddha Garden and the mummified monk at Wat Khunaram, marvel at natural wonders such as hidden waterfalls, bioluminescent seas, and unusual rock formations, or simply immerse themselves in lively hubs like Chaweng and Nathon.

Whether seeking adventure, relaxation, or cultural immersion, Koh Samui provides experiences that go far beyond ordinary tropical getaways. Each corner of the island tells a story, inviting travelers to discover, explore, and create unforgettable memories. With its combination of natural beauty, fascinating culture, and luxury offerings, Koh Samui remains an island that captivates the heart and spirit.

Start your trip-related research with our Koh Samui Travel Guide.