Koh Samui weather

Koh Samui has just two seasons, dry and rainy. From December through to June you can expect the best weather on the Island. Visiting Koh Samui throughout the rest of the year brings the possibility of rain, storms or even more sunny days.

Dry Season

koh Samui weather can become extremely hot; if you are a person who is effected by weather it is easy to choose the months that might best suit you. December through to Febuary is High Season on the island, this is due to the great weather and the amount of sunshine koh samui receives through these months. High season remains from March through to June March however temperatures can regularly climb up to 35 degrees. During this period you can expect sunshine every day and very little rain.

Rainy Season

The rainiest months come between October and November, however, compared to main land Thailand, Koh Samui does not suffer nearly as much rain (as opposed to the east coast of Thailand) during what’s considered the rainy season. You can expect the temperature on the island to stay around 28 degrees throughout this season. However Koh Samui is a tropical island so when visiting you should always expect some sort of rain due to the climate.

Average temperature

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
°C	26	27	29	30	30	29	29	29	28	27	27	27
°F	79	81	83	84	85	84	83	83	82	81	80	80

Average rainfall

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
mm	90	30	30	80	160	100	120	100	130	290	430	150
days	7	5	4	5	9	9	9	10	11	16	15	9