Koh Samui weather in April 2025

Expect 32°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Koh Samui in April. Check more long-term weather averages for Koh Samui in April before you book your next holiday to Thailand in 2025/2026.

  • 32°C maximum daytime temperature in April in Koh Samui32
    32°C max day temperature
  • 8 hours of sunshine per day
  • 8 days with some rainfall in April in Koh Samui8
    8 days with some rainfall
  • 25°C minimum night-time temperature in April in Koh Samui25
    25°C min night temperature
  • 12 hours of daylight per day in April in Koh Samui12
    12 hours of daylight per day
  • Very high heat & humidity in April in Koh SamuiVH
    Very High heat & humidity
  • 85 mm monthly rainfall in April in Koh Samui85
    85 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in April in Koh Samui11
    11+ (Extreme) UV index
  • 30°C sea temperature in April in Koh Samui30
    30°C sea temperature

More about Koh Samui

Koh Samui by month

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

Recommended for Thailand

Travelbag: Latest holiday sale offers worldwide

  • Explore latest sale offers on holidays in 2025/2026
  • Filter deals by continent, star rating & holiday type
  • Including Dubai, Caribbean, North America, Asia & Pacific
Go to Travelbag deal >>

View all Travelbag offers

TravelbagHoliday deal finder

The April 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 / mm)  |  Imperial (°F / inches)

Back to top

More about Thailand

How hot is it in Koh Samui in April?

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

How sunny is it in Koh Samui in April?

There are normally 8 hours of bright sunshine each day in Koh Samui in April - that's 64% of daylight hours.

How warm is the sea around Koh Samui in April?

The average sea temperature around Koh Samui in April is 30°C.

Does it rain in Koh Samui in April?

There are usually 8 days with some rain in Koh Samui in April and the average monthly rainfall is 85mm.

Koh Samui April sunrise & sunset times

Browse the sunrise and sunset times for Koh Samui in April 2025. Select a month to view Koh Samui sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Tuesday, 1st April 2025 06:17 18:30
Tuesday, 15th April 2025 06:10 18:30
Wednesday, 30th April 2025 06:03 18:31

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^