Koh Samui weather in June 2026

Expect daytime maximum temperatures of 88°F in Koh Samui, Thailand in June and very high heat and humidity based on long-term weather averages. There are 6 hours of sunshine per day on average with 16 days with some rainfall and typically 4.6 inches of rainfall in the month.

  • 88°F maximum daytime temperature in June in Koh Samui88
    88°F max day temperature
  • 6 hours of sunshine per day
  • 16 days with some rainfall in June in Koh Samui16
    16 days with some rainfall
  • 75°F minimum night-time temperature in June in Koh Samui75
    75°F min night temperature
  • 13 hours of daylight per day in June in Koh Samui13
    13 hours of daylight per day
  • Very high heat & humidity in June in Koh SamuiVH
    Very High heat & humidity
  • 4.6 inches monthly rainfall in June in Koh Samui4.6
    4.6 inches of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in June in Koh Samui11
    11+ (Extreme) UV index
  • 86°F sea temperature in June in Koh Samui86
    86°F sea temperature

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The June weather guide for Thailand (Koh Samui) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C)  |  Imperial (°F)

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How hot is it in Koh Samui in June?

Daytime temperatures usually reach 88°F in Koh Samui in June with very high heat and humidity, falling to 75°F at night.

How sunny is it in Koh Samui in June?

There are normally 6 hours of bright sunshine each day in Koh Samui in June - that's 46% of daylight hours.

How warm is the sea around Koh Samui in June?

The average sea temperature around Koh Samui in June is 86°F.

Does it rain in Koh Samui in June?

There are usually 16 days with some rain in Koh Samui in June and the average monthly rainfall is 4.6 inches.

Koh Samui June sunrise & sunset times

Browse the sunrise and sunset times for Koh Samui in June 2026. Select a month to view Koh Samui sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st June 2026 05:58 18:37
Monday, 15th June 2026 06:00 18:41
Tuesday, 30th June 2026 06:03 18:44

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