Best time to visit Koh Samui

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Average monthly temperatures

Koh Samui has a hot tropical climate with only a small variation in temperature anually, typically there are both wet and dry seasons, however even during the wet season, showers often arrive in the form of short and heavy downpours usually separated by extended periods of sunshine.
The best time to visit is between December and March when the weather is most settled.
The hottest month of the year is June with an average daily maximum of 33 C and an average low of 24 C.
The coolest month of the year is January with an average daily maximum of 29 C and an average low of 23 C.

Sunshine and rainfall

The driest month is March with 17 mm of rainfall and 30 perfect sunny days. The wettest month is November with 157 mm of rain over 8 days.

Best time to be on the beach

Beaches and swimming are accessible all year with warm sea temperatures usually guaranteed.

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Weather

Average monthly temperature and rainfall for Koh Samui

Average weather in Koh Samui