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Koh Samui weather and climate

Unfortunately visitors are sometimes incorrectly informed about Koh Samui's seasons prior to their departure. Not everyone is aware for example, that we do not have the same rainy season as does Phuket. This is because Koh Samui is situated on the Gulf coast and faces east, and feels the effect of the Northeast monsoon.

January - February is the cool season, temperatures average a pleasant 79°F, 26°C. This is generally the best time to visit as it is not too hot.

March - May is the hot season, the temperature starts warming up, it has been known to reach 40°C There is generally less rain during these months.

June - September generally speaking, between these months, most days will be filled with sun, except for the occasional downpour, which usually doesn't last long.

October - December frequent showers (not monsoons) come in October, and last until sometime around mid December, when the weather generally clears up with extended periods of dry and often sunny weather. Water sports enthusiasts should note that the sea can get rough at this time, and visibility can be affected.

Samui weather Another typical day on the tropical island of
Koh Samui.

 

The above information acts as a general guide of the normal weather patterns, and there are always exceptions to the rule - storms in the dry season or weeks of dry weather in the wet season.

For more information and the latest weather forecast for Koh Samui

todays weather on Koh Samui


Average daily temperatures
 
Jan
Feb
Mar
Apr
May
June
July
Aug
Sept
Oct
Nov
Dec
°C
27
27
28
29
29
28
28
28
28
27
27
26
°F
81
81
82
84
84
82
82
82
82
81
81
79
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