The archipelago of the Surin Islands is about 60 km from the mainland and consists of five islands, the two main inhabited islands Ko Surin Nuea (North Island) and Ko Surin Tai (South Island), as well as the three smaller islands Ko Satok, Ko Pachumba and Ko Torinla and Hin rock Rap.
The Mu-Ko-Surin National Park covers an area of 141.25 km². It includes the Surin Islands and the surrounding sea. The protected areas of about 108 km² or 80% of the area are located in the sea. The park was declared the 29th National Park of Thailand on July 9, 1981. The Mu Koh Surin National Park is known for its unique surrounding marine life for divers and snorkelers. Usually the islands are reached by day trip from the holiday regions Khao Lak or Phuket by organized tour or by liveaboard trip for 4 days or more.
Not many dive safari boats visit the Surin Islands, not because diving at Koh Surin is inferior to other Thai dive destinations, but rather because of its geographic peripheral location. The short 4-day schedule of the more popular Thailand dive safaris does not provide enough time to drive to both the Similans and Surin.