Koh Samui Travel Essentials: Weather, Transport & Tips (2026)

Koh Samui is one of Thailand's most popular islands, but planning your first trip can feel overwhelming. How do you get there? What is the weather really like? How do you get around the island? This comprehensive guide covers everything you need to know before arriving, based on our years of living and working on the island.

Getting to Koh Samui

By Air: Direct Flights

Koh Samui has its own airport (USM), a charming open-air terminal surrounded by palm trees. Bangkok Airways operates the majority of flights, with several daily connections from Bangkok's Suvarnabhumi Airport (about 1 hour). International flights also operate from Singapore, Kuala Lumpur, and Hong Kong seasonally.

The main drawback of flying direct to Samui is cost — Bangkok Airways has near-exclusive access to the airport, and fares tend to be higher than mainland flights. Expect to pay 3,000-8,000 THB one way from Bangkok, depending on season and booking lead time.

Budget Alternative: Fly to Surat Thani + Ferry

For significant savings, fly to Surat Thani Airport (URT) with AirAsia, Nok Air, or Thai Lion Air (fares from 800-2,000 THB from Bangkok). From there, take a bus-ferry combo or a minivan to Don Sak Pier, followed by a ferry to Koh Samui (1.5-2 hours). Combined tickets including the ferry are available and typically cost 300-500 THB on top of the flight.

By Ferry from the Mainland

If you are traveling overland through southern Thailand, ferries depart from Don Sak Pier (about 1 hour south of Surat Thani). Two main operators: Seatran (car ferry, 1.5 hours) and Raja Ferry (car ferry, 1.5 hours). Night ferries from Surat Thani town are also available but slower (6 hours) and less comfortable.

Getting Around Koh Samui

Koh Samui is a medium-sized island (approximately 25 km wide). A single main road — Route 4169 — circles the entire coast. Here are your options for getting around:

Songthaew (Shared Taxi)

Songthaews are converted pickup trucks with bench seating in the back. They operate as shared taxis along fixed routes, mostly on the ring road. Cost: 50-100 THB per person for most routes. They are the cheapest way to get around but can be infrequent outside peak hours. Hail one from the roadside and tell the driver your destination.

Private Taxi

Koh Samui does not have metered taxis. Private taxis are readily available but operate on fixed prices. Expect to pay 300-800 THB depending on distance. Always agree on the price before getting in. Grab (ride-hailing app) operates on Samui but with limited availability — traditional taxis are more reliable.

Scooter Rental

The most popular option among tourists. Cost: 200-350 THB per day for an automatic scooter (Honda Click, Scoopy, or similar). Available from rental shops throughout the island — your hotel can usually arrange one.

Important safety notes: Always wear a helmet (it is the law and police do fine riders without one — 500 THB). Drive on the left. The roads can be steep and winding in the island's interior. Avoid driving after dark or after drinking. Check that your travel insurance covers scooter accidents — many policies exclude them unless you hold a valid motorcycle license.

Car Rental

Available from the airport and several agencies on the island. Cost: 800-1,500 THB per day for a small car, 1,500-2,500 THB for an SUV. An international driving permit is officially required. Driving on Samui is straightforward — one main ring road, with a few inland shortcuts.

Weather: When to Visit Koh Samui

Unlike most of Thailand, Koh Samui has its own microclimate. The monsoon season is different from Bangkok, Phuket, or Chiang Mai. Here is a month-by-month overview:

Key point: Even during monsoon season (October-December), it rarely rains all day. Typical pattern: sunny morning, heavy downpour for 1-2 hours in the afternoon, then clearing. Many travelers visit during this period for the lower prices and enjoy their trip thoroughly.

Note for excursions: Ang Thong National Marine Park closes annually from approximately November 1 to mid-December due to rough seas. All other excursions (Koh Tan, Koh Rap, Safari Tour) operate year-round, weather permitting.

Visa Information

Thailand has a generous visa policy for most Western nationalities. Here is a quick overview (always verify the latest rules before traveling, as policies can change):

You will need a passport valid for at least 6 months from your arrival date, and you may be asked to show proof of an onward or return ticket. Immigration extensions (30 days, 1,900 THB) can be done at the Koh Samui Immigration Office near Nathon.

Money & ATMs

The Thai currency is the Baht (THB). As of early 2026, approximate exchange rates are: 1 EUR = 38 THB, 1 USD = 35 THB, 1 GBP = 44 THB.

• ATMs are widely available across the island, in every town and near all major beaches. Most charge a 220 THB fee per withdrawal for foreign cards. Withdraw larger amounts to minimize fees.
• Cash is still king at street food stalls, songthaews, small shops, and markets. Always carry some cash.
• Credit cards are accepted at hotels, larger restaurants, supermarkets, and tour agencies. Visa and Mastercard are most widely accepted.
• Currency exchange offices are found in Chaweng, Lamai, Nathon, and the airport. Rates are generally fair. Avoid exchanging at hotel front desks — rates are significantly worse.
• Tipping is not mandatory in Thailand but appreciated. Rounding up the bill or leaving 20-50 THB for good service at restaurants is common. For boat tours, 100-200 THB per person for the captain and crew is a kind gesture.

Safety Tips

Koh Samui is generally a very safe destination. Here are the main things to be aware of:

• Road safety is the number one risk. Scooter accidents are the most common reason tourists visit the hospital. Wear a helmet, drive sober, drive on the left, and be cautious on hilly roads.
• Valuables — Use your hotel safe for passports, large amounts of cash, and electronics. Petty theft is uncommon but not unheard of.
• Sea conditions — Always check conditions before swimming, especially October to December. Some beaches have strong currents. Look for red flag warnings. On our excursions, we provide life jackets and assess conditions before departure.
• Sun exposure — The tropical sun is intense. Wear sunscreen (SPF 50+), stay hydrated, and seek shade during peak hours (11:00-14:00).
• Food and water — Tap water is not drinkable. Buy bottled water or use refill stations. Street food is generally safe and delicious — choose stalls that are busy with locals.
• Travel insurance — Strongly recommended. Ensure it covers medical evacuation (the nearest major hospital is in Surat Thani on the mainland) and, if you plan to ride a scooter, motorcycle accidents.

SIM Cards & Internet

Getting connected on Koh Samui is easy and affordable:

• Tourist SIM cards are available at the airport, 7-Eleven shops, and phone stores throughout the island. Major providers: AIS, DTAC, and TrueMove H.
• Cost: Around 299-599 THB for 15-30 days with 15-50 GB of data and unlimited calling. More than enough for most travelers.
• eSIM: If your phone supports it, you can purchase a Thai eSIM online before arriving (providers like Airalo or Holafly). Convenient, but slightly more expensive than a physical SIM.
• Wi-Fi is available at virtually all hotels, restaurants, and cafes. Quality varies — beachfront bungalows may have weaker signals than modern hotels.

Tip: Install the Grab app (Southeast Asia's Uber) and Google Maps offline before arrival. Both are useful on the island.

Practical Tips from Locals

1. Learn basic Thai phrases — "Sawasdee krap/ka" (hello), "Khop khun krap/ka" (thank you), and "Tao rai?" (how much?) go a long way. Locals genuinely appreciate the effort.
2. Visit 7-Eleven — These convenience stores are everywhere and sell everything from SIM cards to snacks, insect repellent, and even surprisingly decent coffee.
3. Eat at local restaurants — The best Thai food on Samui is not at resort restaurants. Head to the night markets (Fisherman's Village walking street on Friday evenings is a must) or roadside Thai restaurants.
4. Respect the culture — Cover shoulders and knees when visiting temples. Remove shoes before entering homes and some shops. The Thai monarchy is deeply respected — never disrespect images of the King.
5. Haggle at markets, but do so with a smile. The first price is usually inflated by 30-50%. Friendly negotiation is expected and part of the experience.
6. Book excursions directly — Booking through your hotel usually adds a significant markup (30-50%). Contact operators like us directly for the best prices and more flexibility.

Frequently Asked Questions