Phang Nga, Thailand – The Similan Islands and Surin Islands, two of Thailand’s most renowned marine national parks, will be temporarily closed to tourists from 16 May to 14 October 2025, as announced by the Department of National Parks, Wildlife, and Plant Conservation (DNP).
This annual closure is part of Thailand’s ongoing conservation efforts to protect fragile marine ecosystems, minimize human impact, and allow coral reefs and marine life to naturally regenerate. The closure also coincides with the monsoon season, when sea conditions can be hazardous.
Why the Closure Is Important
The Similan and Surin Islands are famous for their crystal-clear waters, vibrant coral reefs, and diverse marine life, making them popular spots for diving, snorkeling, and eco-tourism. However, the rise in tourist numbers over the years has put pressure on these delicate environments. The seasonal closure ensures that the ecosystem has ample time to recover and remain sustainable for future generations.
E-Ticketing System to Resume in October
In line with Thailand’s shift toward digital tourism management, the Similan Islands National Park will continue using its e-ticketing system when it reopens on 15 October 2025. Both Thai and international visitors must purchase tickets online, either in advance or before 8:00 a.m. on the day of travel.
This initiative is part of the government’s strategy to enhance the visitor experience while maintaining responsible tourism practices. Tourists are encouraged to plan ahead and use the official DNP e-ticket platform to secure their entry.
Travel Tips for Tourists
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Plan Around the Closure – Travelers visiting Thailand between May and October should explore alternative destinations, such as Koh Tao, Koh Phi Phi, or the Gulf of Thailand islands, which remain open during this period.
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Check Weather Conditions – Even in nearby regions, weather conditions can be unpredictable during the monsoon season.
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Respect Conservation Efforts – Support responsible tourism by choosing tour operators that follow eco-friendly practices.
Looking Ahead
The reopening of the Similan and Surin Islands in October is highly anticipated, especially by divers and nature enthusiasts. By adhering to the closure and e-ticketing regulations, visitors can contribute to the preservation of these world-class marine parks.
For the latest updates and to book tickets for the 2025-2026 season, visit the official Department of National Parks e-ticket website.