Koh Samui in December: weather, sea & travel advice
Koh Samui in December is especially suited to beach holidays, family holidays and city breaks. Days are around 28 °C (warm), and the sea is about 28 °C. With about 13 rainy days it is wet.
Koh Samui · DecemberPhoto: Sonia Selivonchik · CC BY-SA 4.0Climate facts
- Day
- 28 °C
- Night
- 27 °C
- Sea
- 28 °C
- Rainy days
- 13 rainy days
- Sun
- 5 h/day
- Humidity
- 80 %
Suitability by travel type
BeachGood79/100
City breakGood70/100
ActiveLimited51/100
FamilyGood76/100
In favour
- Pleasant daytime temperatures around 28 °C
- Warm, swimmable sea (28 °C)
To consider
- Higher chance of rain (about 13 rainy days)
- High humidity (80 %)
All months at a glance
27J
28F
29M
30A
30M
30J
29J
29A
29S
28O
28N
28D
6J
4F
6M
8A
10M
8J
8J
9A
11S
16O
19N
13D
Similar destinations in December
Frequently asked questions
How warm is Koh Samui in December?
Daytime highs average around 28 °C, with nights around 27 °C.
Can you swim in Koh Samui in December?
The sea is about 28 °C (very warm).
Does it rain a lot in Koh Samui in December?
On the long-term average, expect about 13 rainy days.
When is the best time to visit Koh Samui?
The most favourable months are usually the ones highlighted on the overview page. Values are historical averages, not a forecast.