- Explore latest sale offers on holidays in 2024/2025
- Filter deals by continent, star rating & holiday type
- Including Dubai, Caribbean, North America, Asia & Pacific
Best time to visit Koh Samui
Find the best time to visit Koh Samui and plan your perfect trip in 2024/2025. Get holiday inspiration, weather guides, travel advice and find great deals.
- Best time to visit
- Weather by month
- 5-day weather forecast
- Destinations
- Travel advice
- Deals & discounts
Koh Samui by month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Recommended for Thailand
When is the best time to visit Koh Samui?
Max Day Temperature (°C)
- 29Jan
- 29Feb
- 30Mar
- 32Apr
- 32May
- 31Jun
- 31Jul
- 31Aug
- 31Sep
- 30Oct
- 29Nov
- 29Dec
Which is the hottest month in Koh Samui?
The hottest time of year in Koh Samui is normally April. Expect maximum daytime temperatures to reach 32°C with very high heat and humidity.
Which month has the most rain in Koh Samui?
In terms of rainfall, November is usually the wettest month in Koh Samui with 463mm on average. There are normally 19 days in November with some rain.
When is it sunniest in Koh Samui?
The sunniest time of year in Koh Samui is normally February with bright sunshine on average for 72% of daylight hours; that's 9 hours of sunshine per day.
When is the sea warmest in Koh Samui?
The sea is usually at its warmest in Koh Samui in May when the water temperature reaches 30°C.
Best time to visit
The weather guide for Thailand (Koh Samui) shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by meteoblue. Find out more about our data sources.
Metric (°C / mm) | Imperial (°F / inches)
Thailand travel features
Do you want to learn more about Thailand? Read our latest features covering travel tips and insider destination guides on where to go and what to do in Thailand.
Be inspired
Get your weekly fix of holiday inspiration from some of the world's best travel writers plus save on your next trip with the latest exclusive offers
We promise not to share your details
Related posts
Popular travel offers
Explore holidays in the sun for less
- Beach holidays
- Family holidays
- City breaks
- Summer holidays
- Winter sun holidays
- Holiday offers
- Top travel brands
- Airlines & flights
- Discount hotels
- Airport parking deals
- TUI
- Jet2holidays
- easyJet holidays
- Love Holidays
- Black Friday sales
Airport parking
- Manchester Airport
- Stansted Airport
- Bristol Airport
- Luton Airport
- Birmingham Airport
- Edinburgh Airport
- Gatwick Airport
- Glasgow Airport
- Newcastle Airport
Airport lounges
- Manchester Airport
- Birmingham Airport
- Bristol Airport
- Edinburgh Airport
- Glasgow Airport
- Heathrow Airport
- Newcastle Airport
- Stansted Airport
- Gatwick Airport