August weather forecast and climate
Ko Samui, Thailand

The scenic view of the striking Angthong National Marine Park in Ko Samui, Thailand, calm clear water all around
The scenic view of the striking Angthong National Marine Park in Ko Samui, Thailand, calm clear water all around

What is the temperature in August in Ko Samui?

In August, in Ko Samui, Thailand, the average high-temperature is 31.7°C (89.1°F), and the average low-temperature is 25.2°C (77.4°F).

How many days does it rain in August in Ko Samui?

In Ko Samui, Thailand, in August, during 15 rainfall days, typically 110.9mm (4.4") of precipitation is accumulated.
Average temperature in August - Ko Samui, Thailand
  • Average high temperature in August: 31.7°C

The warmest month (with the highest average high temperature) is April (32.6°C).
The month with the lowest average high temperature is January (29°C).

  • Average low temperature in August: 25.2°C

The month with the highest average low temperature is April (26.1°C).
The coldest month (with the lowest average low temperature) is December (23.9°C).

Average humidity in August - Ko Samui, Thailand
  • Average humidity in August: 78%

Months with the highest relative humidity are October and November (85%).
Months with the lowest relative humidity are June, July and August (78%).

Average rainfall in August - Ko Samui, Thailand
  • Average rainfall in August: 110.9mm

The wettest month (with the highest rainfall) is November (506.6mm).
The driest month (with the lowest rainfall) is February (54.4mm).

Average rainfall days in August - Ko Samui, Thailand
  • Average rainfall days in August: 15 days

Months with the highest number of rainy days are October and November (20 days).
The month with the lowest number of rainy days is March (4 days).

Average sea temperature in August - Ko Samui, Thailand
  • Average sea temperature in August: 29.2°C

The best month for swimming (with the highest average sea temperature) is May (30.1°C).
The coldest month (with the lowest average sea temperature) is January (27.8°C).

Average daylight in August / Average sunshine in August - Ko Samui, Thailand
  • Average daylight in August: 12.4h

The month with the longest days is June (Average daylight: 12.7h).
Months with shortest days are January and December (Average daylight: 11.6h).

  • Average sunshine in August: 6h

The month with most sunshine is February (Average sunshine: 9h).
Months with least sunshine are May, June, July, August, September, October, November and December (Average sunshine: 6).

Average UV index in August - Ko Samui, Thailand
  • Average UV index in August: 12

Months with the highest UV index are February, March, April, May, June, July, August, September and October (UV index 12).
The month with the lowest UV index is December (UV index 10).

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