weather in koh samui in august
If you want Augustâs fantastic weather, with beaches to yourself, see if you can stretch your trip into the first few days of September. August, 2003 on Koh Samui: My first trip to Koh Samui â 14 years ago this August. Only come at this time of year if youâre prepared to fall in love and come back a lot. Like a lot. Temperature (avg): 29Â°C in August vs 28Â°C in September. Sunshine (hours): 6 in August vs 6 in September.