Most of Thailand is drying out in November. Koh Samui isn't. The island sits on the Gulf of Thailand, where the monsoon runs from October to December, and November is usually its wettest month. Here's the honest version, because most "November in Thailand" advice gets Samui wrong.
What the rain is actually like#
| Aspect | November on Samui |
|---|---|
| Rain | Heavy showers most days, some long; occasional stormy spells |
| Sea | Can be rough; ferries to Koh Phangan and Koh Tao sometimes delayed |
| Temperature | Still warm, high 20s to around 30°C |
| Prices | The lowest of the year |
| Crowds | Few |
Dry breaks happen, and some Novembers are kinder than others, but plan for rain rather than hope for sun.
Who November still works for#
- Budget travellers who want the island at its cheapest.
- Long-stay and remote workers who care more about the green hills and quiet than the beach.
- Spa, cooking-class and yoga trips, which don't need sunshine.
- Anyone passing through on the way to the dry season.
Who should go elsewhere#
If beach weather is the point, cross to the Andaman side: Phuket in November and Krabi in November are drying out as Samui gets wetter. The best time to visit Thailand explains the two coasts.
When Samui dries out#
Usually from late December or January, through to about August, with February to April the driest. Koh Samui and the Gulf islands covers the island beyond the weather.
If you do go in November#
Book a place with a pool and a good restaurant, keep plans flexible, and let a local tell you which side of the island is calmer that week. Roavi Local Friends in Koh Samui set their own rates and message you directly before you meet.
Make a rainy-season week on Samui work with a local.
Meet a Local FriendIf you go: where to stay in Koh Samui.
Frequently Asked Questions
Is November a good time to visit Koh Samui?
Not for guaranteed beach weather: November is usually the island's wettest month. It works if you want low prices, a green island and don't mind planning around showers. For dry beaches in November, Phuket and Krabi are the better choice.How much does it rain in Koh Samui in November?
It's the peak of the Gulf's rainy period, October to December. Expect heavy showers most days, sometimes long ones, and occasional stormy spells with rough sea. Dry breaks happen, but don't count on sunny days.When does Koh Samui's dry season start?
Usually from late December or January, running through to about August, with February to April the driest and hottest.Are ferries affected in November?
They run, but rough days can delay or cancel crossings to Koh Phangan and Koh Tao. Allow flexibility if you're island-hopping.Is Koh Samui cheap in November?
Yes, it's the cheapest time of year. Many resorts offer their lowest rates, and the island is quiet.