Dive Sites Around Koh Tao
Koh Tao has long been known as a great place to learn how to scuba dive. This has always been partly due to the very competitive prices for diving in Koh Tao, but also due to the numerous sheltered and shallow local bays that make excellent training reefs for student divers.
You can dive the Koh Samui and Koh Tao diving spots year round, but the very best conditions exist from April to August, which is when the resort areas on the Andaman coast have their low season.
September to November brings the Northeast monsoon winds and surface swells to the islands, reducing visibility by about 30%. It’s pretty rare that any daily dive trips are cancelled from here due to bad weather, but speedboat rides can be somewhat bouncy.