The Sirinat National Park Has been created in 1981. It was know initially as a Had Nai Yang National Park.In 1992 the Royal Forest Department changed the name of the park in commmemoration of the 60th birthday of Her Majesty, Queen Sirikit. The park name was changed to Sirinath Marine National Park. The boundary covers a total area of 90 sq. kms. of which 68 sq. kms. (76%) is marine and 22 sq. kms. (24%) is terrestrial. There're many white sand beaches with range of Casuarina and beach trees. Furthermore, there's coral reef located around National Park office at Hat Nai Yang.

Nai Yang Beach From November to February is the time when many turtles come up from the sea to lay their eggs on the beach such as Nai Yang Beach, Mai Khao Beach, and Sakhu Beach.

Hat Mai Khao Mai Khao is the longest beach in Phuket. It's 8 kilometers from National Park office. It stretches from Hat Nai Yang, airport to Hat Sai Kaeo . It's a white sand beach with plenty of marine animals such as sea cicadas, which has the same size as a beetle of the genus Buprestis. Its shell and legs are like shrimp. Its color is the same color as the sand.

Hat Mai Khao Mai Khao is the longest beach in Phuket. It's 8 kilometers from National Park office. It stretches from Hat Nai Yang, airport to Hat Sai Kaeo . It's a white sand beach with plenty of marine animals such as sea cicadas, which has the same size as a beetle of the genus Buprestis. Its shell and legs are like shrimp. Its color is the same color as the sand.

Hat Nai Thon This white sand beautiful beach is the good place for taking a walk and swimming. It's 5 kilometers from National Park office.

Hat Sai Kaeo Hat Sai Kaeo is connected to Hat Mai Khao. It's such a beautiful but quite place where you can take a rest and picnic. This beach is not good for swimming because of its slope.