Thailand offers diving on both sides according to the monsoon seasons. November to April sees diving at its best in the Andaman Sea region which includes Phuket, the Similans and Khao Lak. Species here include leopard sharks, manta rays and many tropical fish which inhabit the reefs.
From February through to May dive destinations such as Pattaya, Koh Samui and Koh Pha Ngan come alive offering diving in the warm waters of the South China Sea. Diving in Thailand can get crowded on both sides so for peace and quiet head to the more remote locations.