Koh Samui in May
Great time to visit
The sweet spot between dry season prices and rainy season weather. You'll get some rain but also substantial savings and fewer crowds at the beaches.
Weather
Transition month with increasing humidity climbing to 75% and more frequent afternoon storms. Mornings often start clear and hot, with thunderstorms rolling in by mid-afternoon. Seas remain relatively calm on the eastern coast.
33°C high26°C low10 rain days
Crowds & Cost
moderate crowds
~$85/day average
Events & Festivals
- •Vesak Day Buddhist holiday
- •Royal Ploughing Ceremony
- •Local fishing festivals
May Tips
- •Plan beach time for mornings before the afternoon storms hit
- •May offers great deals on accommodation as tourist season winds down
- •Pack a light rain jacket - afternoon showers come fast and heavy
All Months
December through May delivers Samui's best weather – dry, sunny, and breezy. This is peak season, so expect crowds and higher prices. Hotel rates jump 50-100% during European winter months.
But here's Samui's secret advantage: it sits on the opposite monsoon pattern from Phuket and Krabi. While the west coast gets hammered by rain from May to October, Samui stays relatively dry. You might catch afternoon showers, but they pass quickly.
Avoid October and November – this is genuine monsoon season with heavy, persistent rain and rough seas. Many restaurants and tour operators close during these months. Ferry services to other islands become unreliable.
January and February offer the sweet spot: perfect weather, manageable crowds, and reasonable prices. March starts getting hot – temperatures hit 35°C regularly. April brings the hottest weather of the year, though sea breezes provide some relief.
Book accommodations early for Chinese New Year and Songkran (April) – these holidays pack the island with domestic tourists.
Koh Samui Scores
Solo
7/10
Couples
8/10
Families
8/10
Adventure
5/10
Budget
5/10
Luxury
8/10
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