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Koh Samui weather in April 2025
Expect 90°F 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.
- 9090°F max day temperature
- 8 hours of sunshine per day
- 88 days with some rainfall
- 7777°F min night temperature
- 1212 hours of daylight per day
- VHVery High heat & humidity
- 3.33.3 inches of monthly rainfall
- 1111+ (Extreme) UV index
- 8686°F sea temperature
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Koh Samui by month
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Recommended for Thailand
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) | Imperial (°F)
More about Thailand
How hot is it in Koh Samui in April?
Daytime temperatures usually reach 90°F in Koh Samui in April with very high heat and humidity, falling to 77°F 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 86°F.
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 3.3 inches.
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 |
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