The Similan Islands are the jewel of the Andaman Sea — an archipelago of nine uninhabited, national-park islands off the coast of Phang Nga, reached on a fast day trip from Phuket and Khao Lak. Think powder-white beaches, dramatic granite boulders and water so clear it routinely ranks among the world's best snorkelling and diving. For clients who have "done" the closer islands, the Similans are the premium upgrade. As a Thailand DMC for travel agents, Explera handles the speedboat, national-park formalities and timing.
What makes the Similans special?
- Andaman clarity — visibility regularly exceeds anything around the busier inshore islands, making snorkelling and diving exceptional.
- Granite-and-sand scenery — the islands' signature boulder formations and silky white beaches (notably the famous Sail Rock viewpoint) are unmistakable.
- Protected national park — strict conservation keeps reefs and marine life healthier than at many day-trip beaches.
- Bragging-rights factor — for repeat visitors and keen snorkellers, the Similans are the destination that sets a Phuket holiday apart.
Seasonality — the key agent detail
This is the single most important point to brief clients on: the Similan Islands National Park is seasonal and closes during the southwest monsoon. The park is typically open from around mid-October to mid-May and closed the rest of the year to protect the marine environment. Selling a Similan day trip in June–September is not possible — for green-season clients, position the closer Andaman islands instead and hold the Similans for high-season arrivals.
The day-trip format
- Speedboat day trip — early pickup from Phuket or Khao Lak, a fast transfer to the islands, two to three snorkelling stops, beach time and lunch, returning late afternoon.
- Diving options — the Similans are a world-class dive site; certified divers can join day dives or multi-day liveaboards.
- National park fees — payable on top of the tour; we confirm the current inclusions so there are no surprises for your clients.
- Comfort note — it is a longer sea crossing than the inshore islands; advise clients prone to seasickness accordingly.
How agents package it
- High-season hero — make it the standout Andaman day for November–April Phuket clients.
- Snorkel vs dive — offer the snorkel day trip for families and the liveaboard for serious divers through our Thailand DMC tours & activities team.
- Private boat upgrades — for VIP and small-group clients, arrange a private charter via our Thailand DMC boat charters.
- See the wider picture in our Phuket and Phang Nga guides and the full Thailand DMC services for travel agents.
Frequently asked questions
When are the Similan Islands open?
Generally from around mid-October to mid-May. The national park closes during the southwest monsoon (roughly mid-May to mid-October) to protect the reefs, so Similan day trips cannot run in those months.
How far are they from Phuket?
The islands lie off Phang Nga, north of Phuket. By speedboat it is a longer crossing than the inshore islands — an early start is essential, and seasickness-prone clients should be advised.
Snorkelling or diving — which should I sell?
Both are world-class. Families and casual swimmers love the snorkelling day trip; certified divers should be steered toward day dives or a liveaboard for the best of the Similans.
Are national park fees included?
Park fees are normally charged on top of the tour price. We confirm exactly what is included so you can quote your clients accurately with no surprises on the day.
