Koh Samui in January: weather, sea & travel advice
Koh Samui in January is especially suited to beach holidays, family holidays, city breaks and active holidays and hiking. Days are around 27 °C (warm), and the sea is about 28 °C. With about 6 rainy days it is dry.
Koh Samui · JanuaryPhoto: Sonia Selivonchik · CC BY-SA 4.0Climate facts
- Day
- 27 °C
- Night
- 26 °C
- Sea
- 28 °C
- Rainy days
- 6 rainy days
- Sun
- 6 h/day
- Humidity
- 80 %
Suitability by travel type
BeachExcellent91/100
City breakExcellent86/100
ActiveGood68/100
FamilyExcellent89/100
In favour
- Pleasant daytime temperatures around 27 °C
- Warm, swimmable sea (28 °C)
To consider
- 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 January
Frequently asked questions
How warm is Koh Samui in January?
Daytime highs average around 27 °C, with nights around 26 °C.
Can you swim in Koh Samui in January?
The sea is about 28 °C (very warm).
Does it rain a lot in Koh Samui in January?
On the long-term average, expect about 6 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.