Best time to visit Ko Samui

Find the best time to visit Ko Samui and plan your perfect trip in 2024/2025. Get holiday inspiration, weather guides, travel advice and find great deals.

Ko Samui by month

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When is the best time to visit Ko Samui?

The best time to visit Ko Samui is February, March and April based on the following average weather conditions.

Daily hours of sunshine = 10 hours or more [remove]

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Hours of Sunshine (daily)

  • Jan
  • Feb
  • Mar
  • Apr
  • May
  • Jun
  • Jul
  • Aug
  • Sep
  • Oct
  • Nov
  • Dec

Best time to visit

The weather guide for Thailand (Ko 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)

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Which is the hottest month in Ko Samui?

The hottest time of year in Ko 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 Ko Samui?

In terms of rainfall, November is usually the wettest month in Ko Samui with 463mm on average. There are normally 19 days in November with some rain.

When is it sunniest in Ko Samui?

The sunniest time of year in Ko 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 Ko Samui?

The sea is usually at its warmest in Ko Samui in May when the water temperature reaches 30°C.

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