Ko Samui weather in May 2023

  • 32°C maximum daytime temperature in May in Ko Samui32
    32°C max day temperature
  • 6 hours of sunshine per day
  • 17 days with some rainfall in May in Ko Samui17
    17 days with some rainfall
  • 25°C minimum night-time temperature in May in Ko Samui25
    25°C min night temperature
  • 13 hours of daylight per day in May in Ko Samui13
    13 hours of daylight per day
  • Very high heat & humidity in May in Ko SamuiVH
    Very High heat & humidity
  • 172 mm monthly rainfall in May in Ko Samui172
    172 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in May in Ko Samui11
    11+ (Extreme) UV index
  • 30°C sea temperature in May in Ko Samui30
    30°C sea temperature
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The May weather guide for Thailand (Ko 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.

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Metric (°C / mm)  |  Imperial (°F / inches)

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How hot is it in Ko Samui in May?

Daytime temperatures usually reach 32°C in Ko Samui in May with very high heat and humidity, falling to 25°C at night.

How sunny is it in Ko Samui in May?

There are normally 6 hours of bright sunshine each day in Ko Samui in May - that's 51% of daylight hours.

How warm is the sea around Ko Samui in May?

The average sea temperature around Ko Samui in May is 30°C.

Does it rain in Ko Samui in May?

There are usually 17 days with some rain in Ko Samui in May and the average monthly rainfall is 172mm.

Ko Samui May sunrise & sunset times

Browse the sunrise and sunset times for Ko Samui in May 2023. Select a month to view Ko Samui sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st May 2023 06:03 18:31
Tuesday, 16th May 2023 05:59 18:33
Wednesday, 31st May 2023 05:58 18:37

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