Weather in Koh Samui in July

Average daily temperatures

Days are usually hot with balmy evenings, so visitors should pack light and cool clothing. The average daily maximum is 33 C and the average daily minimum is 24 C.

Sunshine and rainfall

There is a 19% chance of a perfect sunny day and a 81% chance of seeing some clouds, with on average 36mm of rainfall this month.

Best time to be on the beach

It’s a great time of year to swim in the sea, with the water at an average temperature of 30 C.