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.

Koh Samui by month

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

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When is the best time to visit Koh Samui?

The best time to visit Koh Samui is February based on the following average weather conditions.

Maximum daytime temperature = 22 - 30°C [remove]
Daily hours of sunshine = 10 hours or more [remove]

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Max Day Temperature (°C)

  • 29°C maximum daytime temperature in January in Koh Samui29
    Jan
  • 29°C maximum daytime temperature in February in Koh Samui29
    Feb
  • 30°C maximum daytime temperature in March in Koh Samui30
    Mar
  • 32°C maximum daytime temperature in April in Koh Samui32
    Apr
  • 32°C maximum daytime temperature in May in Koh Samui32
    May
  • 31°C maximum daytime temperature in June in Koh Samui31
    Jun
  • 31°C maximum daytime temperature in July in Koh Samui31
    Jul
  • 31°C maximum daytime temperature in August in Koh Samui31
    Aug
  • 31°C maximum daytime temperature in September in Koh Samui31
    Sep
  • 30°C maximum daytime temperature in October in Koh Samui30
    Oct
  • 29°C maximum daytime temperature in November in Koh Samui29
    Nov
  • 29°C maximum daytime temperature in December in Koh Samui29
    Dec

Hours of Sunshine (daily)

  • Jan
  • Feb
  • Mar
  • Apr
  • May
  • Jun
  • Jul
  • Aug
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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)

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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.

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