February in Ko Samui averages a daily high of 29.5°C with nights around 24.8°C. Expect roughly 6.3 wet days totalling 48.5mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Ko Samui is January–April.
Based on KO SAMUI, TH (14.7km), 1995–2024. 24 years of February data.