Weather in Ko Samui in May
Ko Samui, Thailand averages a high of 30.2°C (86.4°F) and low of 27.2°C (81°F) in May, with 20 rain days and 10.6 hours of daily sunshine. Travel score: 65.8/100 (Good). The best time to visit Ko Samui is February.
High
30°C86°F
Low
27°C81°F
🌧️
20
rain days
☀️
10.6
hrs/day sunshine
💧
78%
humidity
66— Good
May in Ko Samui is hot and very rainy — pack an umbrella and enjoy indoor attractions too.
What are the average temperatures in Ko Samui?
How much does it rain in Ko Samui in May?
Ko Samui receives an average of 116.5mm of rainfall across 20 rainy days in May. The annual total is 1531.5mm.
What should I pack for Ko Samui in May?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light, breathable clothing
Hot weather with highs around 30°C
🧢
Sun hat or cap
Protection from intense sun
🧥
Waterproof jacket
Frequent rain expected (20 rainy days)
☔
Umbrella
Essential for the rainy season
👢
Waterproof shoes
Keep your feet dry in wet conditions
🧴
Sunscreen SPF 30+
11 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
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How can I plan my trip to Ko Samui?
What other cities are near Ko Samui?
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What is the weather like in other months in Ko Samui?
Data based on 1994–2024 averages · Last updated: 2024-12-31