The following weather chart displays the monthly average weather conditions for Chaweng Beach, Koh Samui. The red line displays the monthly day time maximum temperature while the blue line indicates the average night time minimum. The bar chart shows the number of wet days per month that Chaweng Beach experiences.
The average weather for Chaweng Beach, Koh Samui, Thailand
Chaweng Beach and Ko Samui are classified as having a tropical monsoon climate meaning that the island has a dry season and a wet season. The weather of Chaweng Beach has three seasons; the dry season, the short monsoon season and the hot season which has many heavy showers.
The dry season lasts from late December through to March and this is the main tourist season of Chaweng Beach. The tourist season’s weather is bright, hot and not to humid - just right for spending time on the island’s great beaches. The driest month is February and under the Köppen climate classification is the only month which has rain levels that are regarded as a true dry season. For a guide to Koh Samui and Koh Phangan click here.
Towards the end of the dry season the temperatures and humidity of Chaweng Beach increase. From April until the late autumn monsoons the weather of Chaweng Beach is the hot and humid with frequent downpours. These rains are short lived and there is always blue sky's afterwards. Ko Samui’s location means that it avoids much of the south-eastern monsoon that punishes Thailand's Andaman coastline. If you are planning to visit Thailand during the summer months Koh Samui and Chaweng Beach would be a sensible location to consider.
Chaweng Beach is hit by a much later monsoon, which arrives from the south west and strikes between September and mid November. As a tourist avoid this season due to flooding and high winds that disrupt transport connections. Ko Samui as an island has less annual rain that the island’s main resort rival of Phuket.