Get Exclusive App Deals
English
Koh Samui Island
Top activities in Koh Samui Island
Trending place to visit
Latest update
Walking around
Koh Samui Island Weather and climate
Data source：Meteostat
Update date：2025-09
Koh Samui Island year round climate
- Spring (March–May): Average 83–85°F, hot and dry climate with low rainfall. Common activities: Swimming, sunbathing, watersports. Recommended clothing: Light short sleeves, shorts, swimwear, sandals.
- Summer (June–August): Average 84–85°F, hot and humid climate with occasional showers. Common activities: Swimming, diving, snorkeling, island exploration. Recommended clothing: Light and breathable clothing, short sleeves, shorts, sandals, and rain gear.
- Autumn (September–November): Average 81–83°F, warm and humid climate with gradually increasing rainfall. Common activities: Visiting temples, enjoying Thai massage, tasting local cuisine. Recommended clothing: Light long sleeves or short sleeves, long pants or shorts, comfortable shoes.
- Winter (December–February): Average 80–82°F, warm and humid climate with higher rainfall. Common activities: Swimming, sunbathing, watersports, but be mindful of sea conditions. Recommended clothing: Light long sleeves or short sleeves, long pants or shorts, comfortable shoes, and rain gear.
Koh Samui Island climatological average
Annual average temperature: approx. 83.3°F / Annual rainfall: approx. 2370 mm / Summer humidity: 70%–80% / Rainiest month: December
Koh Samui Island monthly average temperature and precipitation
Month
Air temperature (°F)
Precipitation (mm)
January
81.3°F
186.9
February
82°F
120.5
March
83.3°F
59.4
April
85.3°F
31.3
May
85.6°F
136.7
June
85.5°F
110
July
84°F
218
August
84.7°F
113.9
September
83.5°F
162.2
October
82.2°F
326.4
November
81.1°F
445.1
December
81°F
460.5
Koh Samui Island weather for the next seven days
10/13
Monday
Moderate rain
83.6°F/80.6°F
10/14
Tuesday
Moderate rain
81.8°F/80.4°F
10/15
Wednesday
Patchy rain nearby
83.5°F/82.1°F
10/16
Thursday
Patchy rain nearby
84°F/82.4°F
10/17
Friday
Moderate rain
83.6°F/81.1°F
10/18
Saturday
Patchy rain nearby
83.9°F/82.3°F
10/19
Sunday
Patchy rain nearby
84°F/82.2°F
