Koh Samui in July: weather, sea & travel advice
Koh Samui in July is especially suited to beach holidays, city breaks and family holidays. Days are around 29 °C (warm), and the sea is about 30 °C. With about 8 rainy days it is moderate.
Koh Samui · JulyPhoto: Sonia Selivonchik · CC BY-SA 4.0Climate facts
- Day
- 29 °C
- Night
- 28 °C
- Sea
- 30 °C
- Rainy days
- 8 rainy days
- Sun
- 6 h/day
- Humidity
- 80 %
Suitability by travel type
BeachExcellent80/100
City breakGood77/100
ActiveLimited59/100
FamilyGood76/100
In favour
- Pleasant daytime temperatures around 29 °C
- Warm, swimmable sea (30 °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 July
Frequently asked questions
How warm is Koh Samui in July?
Daytime highs average around 29 °C, with nights around 28 °C.
Can you swim in Koh Samui in July?
The sea is about 30 °C (very warm).
Does it rain a lot in Koh Samui in July?
On the long-term average, expect about 8 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.