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 based on the following average weather conditions.

Maximum daytime temperature = 72 - 86°F [remove]
Daily hours of sunshine = 10 hours or more [remove]

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Max Day Temperature (°F)

  • 84°F maximum daytime temperature in January in Ko Samui84
    Jan
  • 84°F maximum daytime temperature in February in Ko Samui84
    Feb
  • 86°F maximum daytime temperature in March in Ko Samui86
    Mar
  • 90°F maximum daytime temperature in April in Ko Samui90
    Apr
  • 90°F maximum daytime temperature in May in Ko Samui90
    May
  • 88°F maximum daytime temperature in June in Ko Samui88
    Jun
  • 88°F maximum daytime temperature in July in Ko Samui88
    Jul
  • 88°F maximum daytime temperature in August in Ko Samui88
    Aug
  • 88°F maximum daytime temperature in September in Ko Samui88
    Sep
  • 86°F maximum daytime temperature in October in Ko Samui86
    Oct
  • 84°F maximum daytime temperature in November in Ko Samui84
    Nov
  • 84°F maximum daytime temperature in December in Ko Samui84
    Dec

Hours of Sunshine (daily)

  • Jan
  • Feb
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  • Apr
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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)  |  Imperial (°F)

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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 90°F 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 18.2 inches 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 86°F.

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