Koh Samui (Chaweng): weather and best time to visit
Koh Samui (Chaweng) (Thailand) reaches its warmest daytime temperatures in May at around 31°C; the coolest month is December at around 28°C. The sea is warmest in May at about 30°C.
Best time to visit
- 🏖 Beach
- 🏛 City trip
- 🥾 Hiking
Things to do in Koh Samui (Chaweng)
Tours, tickets and activities for your trip.
Koh Samui (Chaweng) climate, month by month
| Month | Day °C | Night °C | Sea °C | Rain d | Sun h | Beach | City | Hiking |
|---|---|---|---|---|---|---|---|---|
| Jan | 28° | 25° | 28° | 19 | 11 | 80 | 63 | 47 |
| Feb | 28° | 26° | 28° | 12 | 11 | 83 | 66 | 50 |
| Mar | 30° | 26° | 29° | 12 | 11 | 84 | 61 | 45 |
| Apr | 31° | 27° | 30° | 16 | 11 | 80 | 52 | 36 |
| May | 31° | 27° | 30° | 22 | 11 | 80 | 51 | 35 |
| Jun | 30° | 27° | 30° | 18 | 10 | 80 | 52 | 36 |
| Jul | 31° | 27° | 30° | 16 | 10 | 79 | 50 | 34 |
| Aug | 31° | 26° | 29° | 21 | 10 | 79 | 51 | 35 |
| Sep | 30° | 26° | 29° | 21 | 9 | 79 | 55 | 39 |
| Oct | 28° | 25° | 29° | 27 | 9 | 79 | 61 | 45 |
| Nov | 28° | 25° | 29° | 23 | 9 | 80 | 62 | 46 |
| Dec | 28° | 25° | 28° | 19 | 10 | 79 | 63 | 47 |
Rain d = average rain days per month · Sun h = average sunshine hours per day · scores 0–100, higher is better.
Every month in detail
Koh Samui (Chaweng) in January
Daytime highs around 28°C, nights near 25°C. Expect about 19 rain days and 11 hours of sunshine per day. The sea is properly warm at 28°C.
Beach: excellentCity: goodHiking: mixedMore destinations for January →
Koh Samui (Chaweng) in February
Daytime highs around 28°C, nights near 26°C. No month gets more sunshine. Expect about 12 rain days and 11 hours of sunshine per day. The sea is properly warm at 28°C.
Beach: excellentCity: goodHiking: mixedMore destinations for February →
Koh Samui (Chaweng) in March
Daytime highs around 30°C, nights near 26°C. It is also the driest month of the year. Expect about 12 rain days and 11 hours of sunshine per day. The sea is properly warm at 29°C.
Beach: excellentCity: goodHiking: mixedMore destinations for March →
Koh Samui (Chaweng) in April
Daytime highs around 31°C, nights near 27°C. Expect about 16 rain days and 11 hours of sunshine per day. The sea is properly warm at 30°C.
Beach: excellentCity: mixedHiking: poorMore destinations for April →
Koh Samui (Chaweng) in May
Daytime highs around 31°C, nights near 27°C. May is the warmest month of the year. The sea is at its warmest now. Expect about 22 rain days and 11 hours of sunshine per day. The sea is properly warm at 30°C.
Beach: excellentCity: mixedHiking: poorMore destinations for May →
Koh Samui (Chaweng) in June
Daytime highs around 30°C, nights near 27°C. Expect about 18 rain days and 10 hours of sunshine per day. The sea is properly warm at 30°C.
Beach: excellentCity: mixedHiking: poorMore destinations for June →
Koh Samui (Chaweng) in July
Daytime highs around 31°C, nights near 27°C. Expect about 16 rain days and 10 hours of sunshine per day. The sea is properly warm at 30°C.
Beach: goodCity: mixedHiking: poorMore destinations for July →
Koh Samui (Chaweng) in August
Daytime highs around 31°C, nights near 26°C. Expect about 21 rain days and 10 hours of sunshine per day. The sea is properly warm at 29°C.
Beach: goodCity: mixedHiking: poorMore destinations for August →
Koh Samui (Chaweng) in September
Daytime highs around 30°C, nights near 26°C. Expect about 21 rain days and 9 hours of sunshine per day. The sea is properly warm at 29°C.
Beach: goodCity: mixedHiking: poorMore destinations for September →
Koh Samui (Chaweng) in October
Daytime highs around 28°C, nights near 25°C. It is the rainiest month of the year. Expect about 27 rain days and 9 hours of sunshine per day. The sea is properly warm at 29°C.
Beach: goodCity: goodHiking: mixedMore destinations for October →
Koh Samui (Chaweng) in November
Daytime highs around 28°C, nights near 25°C. Expect about 23 rain days and 9 hours of sunshine per day. The sea is properly warm at 29°C.
Beach: excellentCity: goodHiking: mixedMore destinations for November →
Koh Samui (Chaweng) in December
Daytime highs around 28°C, nights near 25°C. December is the coldest month of the year. Expect about 19 rain days and 10 hours of sunshine per day. The sea is properly warm at 28°C.
Beach: goodCity: goodHiking: mixedMore destinations for December →
Related destinations
More in Thailand: Patong Beach (Phuket) · Ao Nang (Krabi) · Koh Phangan (Haad Rin) · Koh Tao (Sairee Beach) · Koh Chang (White Sand Beach) · Koh Lanta (Long Beach)
Similar climate: Kota Kinabalu (Borneo), Malaysia · Le Gosier, Guadeloupe · Mactan (Cebu), Philippines · Las Terrenas, Dominican Republic