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The climate of Ko Samui (Thailand)
Ko Samui is an island in the Gulf of Thailand. It is situated off the south east coast of Thailand. Ko Samui was discovered as a holiday destination by backpackers in the 1970s. Almost half a century later major project developers have settled here and tourism flourishes. Ko Samui has beautiful white beaches and an azure blue sea. Ko Samui is a young and attractive holiday destination. Besides tourism coconut plantations and fishery are the major sources of income.
Ko Samui has two types of seasons. The warm tropical part of the year has a short rainy season. As opposed to Phuket and other parts in South-Thailand Ko Samui has two rainy seasons. The first is limited to November only. In other parts of the year the climate is relatively dry. The second period starts in October and is part of the monsoon. Heavy rains for longer periods are not uncommon. This period lasts till December. During the regular rainy season less rain falls than in other parts of Thailand. During the rainy season tropical storms and hurricanes are not uncommon.

 

Climate information
The figures below are based on long term weather and climate records. They are an average for Ko Samui:

average
 maximum
temperature (°C)

average
minimum

temperature (°C)
average
hours of sunshine

per
day
average days with precipitation
per month
average
mm
precipitation
per month
average
sea
temperature (°C)
January 29 22 7 9 28
February 29 23 8 4 28
March 30 24 8 4 29
April 32 25 8 8 30
May 32 25 6 17 30
June 31 25 6 16 30
July 31 24 6 16 29
August 31 24 6 16 29
September 31 24 6 18 29
October 30 23 6 20 29
November 29 23 6 20 29
December 29 22 7 15 28
= 0-5 mm ● = 6-30 mm ● = 31-60 mm ● = 61-100 mm ● = 101-200 mm ● = over 200 mm
= 0-0.2 inches ● = 0.2-1.2 inches ● = 1.2-2.4 inches ● = 2.5-4 inches ● = 4.1-8 inches ● = over 8 inches

More climate information
Climate figures are very useful but don’t present a general impression of the climate and the eventual weather circumstances within a certain period. The figures don’t always reflect the chance of wintry weather, extreme heat or hurricanes. That is why we offer useful extra climate information for each month of the year:
 

chance of
(very) hot

weather

chance of
(very) cool
weather
chance of
long-term

precipitation
chance of
hurricanes
(cyclones)
chance of
sunny days

UV-index

January
February
March
April
May
June
July
August
September
October
November
December
click here for the explanation of the symbols

Disclaimer
The information at this site was carefully composed from climate data collected by meteorological services, meteorological offices, climate experts and other sources. “More climate info” is based on statistics, climate data and personal experience. No rights can be derived from this site. Weather has no memory and gives no guaranties. Nothing is as changeable and unpredictable as the weather. The authors of this site feel in no way responsible for any damages caused by misinterpretation or other circumstances that may influence your holiday or trip to a certain destination. We provide information, it’s up to the reader to use it to it’s benefit.

 

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