Similan Islands reopen for visitors on 15 October 2026

The Similan Islands will reopen to visitors on 15 October 2026 in Phang Nga, Thailand, after the annual monsoon closure. The opening begins the 2026-27 visiting season and restores access to the marine national park's beaches, coral reefs and viewpoints.

The park's Thai name is written in a non-Latin script by the national authorities, so this article uses the established English name Similan Islands.

Similan Islands reopening starts on 15 October 2026

The Department of National Parks, Wildlife and Plant Conservation states that the Similan Islands are open for tourism from 15 October to 15 May each year. Its information page published on 7 August 2026 gives the same seasonal dates for the national park and identifies the islands as a destination in Thailand's southern Andaman Sea. The national park opening dates therefore place the first visitor day of the new season on 15 October 2026.

The reopening follows a five-month closure that covers the rougher monsoon period. During the shutdown, tourism and overnight stays are suspended, while authorities use the interval for ecosystem recovery and improvements to utilities and visitor facilities. The seasonal pause is described by Thailand's national park authorities as both a safety measure and a conservation measure.

What the reopening changes at the marine park

From 15 October 2026, the archipelago moves from its closed period into the regular visitor season. The published schedule continues until 15 May 2027, after which the annual closure resumes. This gives travellers from Western Europe a clear distinction between a lawful visit in the season and an attempted trip during the monsoon shutdown.

The timing also connects the access change to the character of the place. The park's information describes white sandy beaches, clear sea, coral reefs and varied marine life, while Sail Rock on Island Eight provides a named viewpoint above a curving bay. The reopening date is therefore not only a calendar change: it determines when visitors can again reach the beaches, reefs and viewpoint described by the custodian.

Overnight accommodation on the islands is not part of the current practical picture in the closure notice. The authorities refer to tourism and overnight stays together when describing the seasonal shutdown, so the reopening should be understood as the return of permitted visits within the national park season, not as a permanent change to accommodation policy.

Why Phang Nga matters to the Similan Islands season

The islands form a marine national park in Phang Nga province on Thailand's Andaman coast. The mainland departure area associated with visits is Thap Lamu, while the islands themselves contain the beaches, reefs and Sail Rock viewpoint that define the park's visitor geography.

The five-month pause also explains why the 15 October date matters to conservation. The closure avoids the monsoon period and gives marine ecosystems time to recover before the next season. For visitors, the same rule means that an itinerary in early October cannot include the park, while a planned arrival from 15 October 2026 falls inside the published season.

Visiting Similan Islands: what travellers from Western Europe should know

• The reopening date is 15 October 2026, and the published 2026-27 season runs until 15 May 2027.
• Access is unavailable during the annual closure from 16 May to 14 October; the reopening restores seasonal visitor access to the park.
• The islands are in Phang Nga on Thailand's Andaman coast, with Thap Lamu serving as the mainland departure area for visits.
• The park's named visitor features include white sandy beaches, coral reefs and Sail Rock on Island Eight.
• Thailand's official language is Thai and its national currency is the baht.
• Entry requirements depend on your nationality; UK travellers can check the FCDO travel advice at gov.uk/foreign-travel-advice, Irish travellers the Department of Foreign Affairs at ireland.ie.

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Frequently asked questions about Similan Islands

When does the Similan Islands reopening take place?

The park reopens on 15 October 2026 for the 2026-27 season, which is scheduled to continue until 15 May 2027.

Where are the Similan Islands and how do visitors get there?

The islands are in Phang Nga on Thailand's Andaman coast. Thap Lamu is the associated mainland departure area for visits.

What are the Similan Islands?

They are a marine national park with white sandy beaches, coral reefs, marine life and the Sail Rock viewpoint on Island Eight.