Ang Thong National Marine Park in Surat Thani Province will temporarily close to visitors and overnight stays from November 1 to December 15, 2026, for 45 days. The annual closure is intended to allow the natural environment to recover and to support maintenance and restoration work within the national park.
Why Is Ang Thong Marine Park Closing?
The closure period coincides with the northeast monsoon season in the Gulf of Thailand, when strong winds and waves can make sea travel unsafe.
Ang Thong Marine Park closes during this period every year to help protect and restore its natural resources after the busy tourist season. The temporary closure gives the sea, coral reefs, beaches, and surrounding ecosystems time to recover.
Ang Thong Marine Park Closure Dates 2026
The park will be closed from:
November 1 – December 15, 2026
During this period, visitors will not be allowed to enter the park for sightseeing, snorkeling, kayaking, or overnight stays.
Tours operating to Ang Thong Marine Park from Koh Samui, including speedboat tours, catamaran trips, and private boat charters, will also stop operating to the park during the official closure period.
When Can You Visit Ang Thong Marine Park?
If you are planning an Ang Thong Marine Park tour from Koh Samui, we recommend traveling before November 1, 2026, or planning your trip after the park reopens on December 16, 2026, subject to weather and sea conditions.
It is always a good idea to check the latest weather conditions and tour availability before traveling, especially during the transition into and out of the monsoon season.
Alternative Things to Do During the Park Closure
Even while Ang Thong Marine Park is closed, visitors can still enjoy Koh Samui and nearby islands as normal.
Alternative experiences include trips to Koh Tan, Koh Madsum (Pig Island), and various sightseeing and activity programs around Koh Samui.
Check our website for alternative tours and activities available during the Ang Thong Marine Park closure period.
Please note: The reopening of Ang Thong National Marine Park on December 16, 2026, is subject to official announcements and suitable weather and sea conditions.