Month-by-month travel weather
Ko Samui May weather
Ko Samui, Thailand · May
Sudden rain can change the rhythm
May often brings more frequent showers and heavier humidity, making heat feel weightier.
After rain, it can feel hot again, and staying damp becomes uncomfortable—quick-dry gear helps.
May averages at a glance
Average low
around 26°C
Average high
around 31–32°C
Average rainfall
around 100–180 mm
Wet days
about 10–18 days
What to wear in May in Ko Samui
Actual feel will change with wind and rain, but use the suggestions below to build a comfortable layered outfit.
- • Quick-dry fabrics help a lot.
- • Water-safe pouch and an umbrella option stabilize plans.
- • Wet-tolerant footwear is practical.
Travel tips for visiting Ko Samui in May
- • Use the pause-and-move rhythm: wait during showers, move after.
- • Treat boat plans as conditional and keep a Plan B ready.
May weather in Ko Samui — FAQ
Q. Is May rainy season?
A. It often feels like the start of more frequent showers. Exact patterns vary by year.
Q. Do tours cancel when it rains?
A. Not always. Wind and waves can matter more than rain alone.
Explore Ko Samui
These pages are connected so you can compare conditions and decide for yourself.