
Koh Samui is a tropical island – you may expect temperatures between 25° and up to 33° or more with a variation in humidity depending on the season. From the end of December until April you will find a more moderate climate with a lot of sunshine. During May and June there is the so called monsoon season and you may get occasionally a short period of rain. The summer months – in contrast to other regions of Thailand like e.g. Phuket – provide usually a very stable weather situation in Koh Samui and from the middle of October until the middle of December you are very likely to encounter some rain showers as it is the rainy season. Also the rain season is charming because now the island is in full bloom.
However the weather can not be predicted or categorised and conditions are also influenced by different phenomenon like e.g. El Nino.
Dry Season, December – February: The dry season on Samui. Not much raining, but it can be a some refreshing wind or breeze on these islands then. Great for bodysurfing. The sun is shining a lot on us at this period of the year!
Hot Season, March – August: The weather is still dry in this time, and rather hot. In May the raining may increase a little. This is a great period to visit Samui if you can stand 30-35 degrees Celsius daytime. The sunshine is still dominating the day time, almost as much as in the Dry Season.
Rain Season, September – November: Also known as the monsoon season. It’s still hot and normally, there are many sunny days anyway. Sometimes you might find yourself in a refreshing monsoon shower for a moment. The rain showers often last just for a short while though and as these island’s water supplies are finite, the water is needed.
Which kind of weather you may expect in Koh Samui during your stay you can also check on the homepage http://www.reisewetter.de under Asien / Bangkok / Koh Samui.