Chaweng beach is definitely the most popular surfing beach in Koh Samui.
There are surfboards and bodyboards for rent along the beach and many of the local surfers are happy to give you tips on surfing if you are a first timer.
The 'Left Alone' reef break off Chaweng beach is rarely ridden. The 'Left Alone' gives a long surfable left hander and is best surfed at mid to high tide, when the waves are over 4 feet. At low tide it can become too shallow for surfing.In front of the Le Meridien Baan Taling Naam Resort is a reef break suitable for experienced surfers only.
It breaks on a shallow coral reef and as reports go can get quite fast and sucky.