Planning a trip to Koh Samui from the UK, the US or Australia takes a little thought, because the island has a different rhythm to the rest of Thailand and its own weather pattern. This guide brings together everything you need to plan well: when to come, how to get here, how long to stay, how to get around, what it costs, and what to book before you arrive.
Quick answer: The best time to visit Koh Samui is December to August, with the driest weather from December to March. Most visitors fly in to Samui Airport or fly to Surat Thani and take a ferry. Five to seven days is enough for the island itself, longer if you are combining it with other islands. You do not need to rent a car, and the experiences that sell out fastest, such as private boat trips and a private chef, are worth booking before you arrive in peak season.
- Best time to visit: December to August; driest December to March.
- Getting here: fly to Samui Airport, or to Surat Thani then ferry.
- How long: five to seven days on the island is a good base.
- Getting around: taxis, scooters and private transfers; no car needed.
- Book ahead: boat trips and a private chef in the December to March peak.
When to visit Koh Samui
The best months are December to August, with the calmest, driest weather from December to March. The island has its own monsoon late in the year, so October and November are the wettest months and the only time worth planning around. Our guide to the weather in Koh Samui breaks the year down month by month.
How to get to Koh Samui
There are two main routes. You can fly directly to Samui Airport, which is quickest, or fly to Surat Thani on the mainland and take a ferry across, which is often cheaper. Our guide on how to get to Koh Samui compares the options and costs.
How long to stay
Five to seven days is a comfortable amount of time for Koh Samui itself, enough to mix beach days, island trips and a few experiences without rushing. If you are touring more of the country, our two-week Thailand itinerary shows how Samui fits into a longer trip.
Getting around the island
You do not need to rent a car in Koh Samui. Most visitors use a mix of taxis, private transfers and scooters, and many activities include hotel pickup. Our guide to the easiest way to get around Koh Samui covers each option and roughly what it costs.
What a trip to Koh Samui costs
Koh Samui suits a wide range of budgets, from group day tours to private charters and in-villa dining. Our traveller's guide to budgeting in Koh Samui sets out realistic daily costs for food, transport and activities.
What to book before you arrive
A few experiences are worth arranging before you travel, particularly in the December to March peak when they sell out. The most popular are private boat trips and in-villa dining.
- Island trips: see our island-hopping guide and how to choose a boat trip.
- In-villa dining: a private chef is the best upgrade for a villa stay.
- A planned itinerary: we can arrange the whole stay through our bespoke itinerary planning.
Things to know before you go
A little local knowledge goes a long way, from currency and tipping to staying safe on a scooter. Our guide to things to know before travelling to Thailand covers the essentials, and the Ultimate Koh Samui Travel Guide goes deeper still.
Frequently Asked Questions
How many days do you need in Koh Samui?
Five to seven days is a good amount of time for the island itself, enough to combine beach days, an island trip or two and a few experiences. Allow longer if you are also visiting other islands or the mainland.
What is the best time to visit Koh Samui?
December to August is best, with the driest, calmest weather from December to March. October and November are the wettest months because of the island's monsoon.
How do you get to Koh Samui?
You can fly directly to Samui Airport, which is fastest, or fly to Surat Thani on the mainland and take a ferry, which is usually cheaper.
Do you need to rent a car in Koh Samui?
No. Most visitors get around by taxi, private transfer and scooter, and many activities include hotel pickup. A car is not necessary for a typical stay.
What should you book before arriving in Koh Samui?
Book the experiences that sell out in peak season, mainly private boat trips and a private chef, before you arrive between December and March. We can also plan a full itinerary in advance.
About Paradise Travel and Tours
We are a small, Koh Samui-based team who plan and arrange trips across the island and its surrounding archipelago, from single experiences to a whole curated stay. If you would like us to help plan your trip, start with our bespoke itinerary planning.
TAT Licence: 43/01405 | Website: www.paradisetravelandtours.co
Reviewed June 2026. Details are a guide and are confirmed at the time of booking.