Thailand Closes Similan and Surin Marine Parks for Annual Recovery Period

Thailand has temporarily closed two of its most famous marine national parks in Phang Nga Province — the Similan Islands and Surin Islands — for the annual low-season recovery period.

The closure officially began on May 15 and will remain in effect until October 15, 2026. During this time, all tourism activities and overnight stays inside the parks are suspended.

The Department of National Parks, Wildlife and Plant Conservation said the seasonal shutdown coincides with the southwest monsoon period in the Andaman Sea, when rough sea conditions can pose safety risks to visitors and tour operators.

According to Surasak Anusorn, director of Conservation Area Management Office 5 in Nakhon Si Thammarat, the closure also plays an important role in protecting fragile marine ecosystems by giving coral reefs, beaches, and underwater habitats time to recover from heavy tourist activity.

Officials said park authorities will use the five-month closure period to improve infrastructure, utilities, and visitor facilities in preparation for the next tourism season.

The annual suspension of tourism has become a key part of Thailand’s long-term environmental management strategy aimed at balancing tourism with conservation efforts in sensitive marine areas.

The Similan and Surin Islands are internationally known for their crystal-clear waters, coral reefs, rich marine biodiversity, and white-sand beaches. Both destinations are considered among Thailand’s top diving and snorkeling locations and attract large numbers of international tourists each year during the high season.

Authorities expect the parks to reopen to visitors in mid-October once weather conditions improve and maintenance work is completed.