Similan Islands Day Trip From Phuket

A Similan Islands day trip is a single-day boat excursion from Phuket or Khao Lak to Mu Ko Similan National Park, a chain of 11 granite islands about 70 kilometres offshore in the Andaman Sea. You leave your hotel early, cross by speedboat, and spend the day snorkelling, swimming and sunbathing on some of Thailand's clearest water before heading back the same evening.

Booking a Similan Islands day trip has become the most popular way to see a world-class marine park without committing to a multi-day liveaboard. You get the powder-white sand, the reef fish and the granite scenery in one long day.

What is a day trip to the Similan Islands?

The trip packs the park's headline sights into a single day. An operator collects you in Phuket, drives you north to the mainland pier, and runs you out by boat to two or three of the accessible islands. You never really visit a town along the way. Lunch, snorkelling gear and a guide are bundled into the price, so the day is largely planned for you.

Where are the Similan Islands?

The Similan Islands sit about 70 kilometres northwest of Phuket, off Phang Nga Province and due west of Khao Lak. The name comes from the Malay word "sembilan", meaning nine, the original island count before Ko Bon and Ko Tachai were added. According to the Department of National Parks, the park protects roughly 140 square kilometres of sea and shore.

What makes the Similan Islands worth the trip?

The draw is the water. Visibility on a calm day runs past 20 metres, and the sand on Ko Miang and Ko Similan is fine and pale. The granite boulders that tumble into the sea give the islands a look you will not find at Phuket's own beaches. When we visited, the reef straight off Donald Duck Bay held clouds of sergeant majors, parrotfish and the occasional blacktip reef shark in the shallows. In our experience, the sand alone justifies the early alarm.

A Similan Islands day trip from Phuket runs on a long, early schedule. Most operators collect you between 6:00am and 7:00am, drive about 90 minutes north to Thap Lamu Pier near Khao Lak, then run a 90-minute speedboat crossing to the park. You reach the first island by mid-morning, visit two or three stops, and are back at your hotel by early evening.

Getting from Phuket to Thap Lamu Pier

Every Similan day boat leaves from the mainland, not from Phuket, because the park sits far up the Andaman coast. The standard departure point is Thap Lamu Pier in Thai Mueang District, Phang Nga, about 65 kilometres from the islands. Your operator arranges the hotel pickup and the minibus transfer as part of the price. We recommend a hotel in the north of Phuket, around Bang Tao or the airport, to shave 30 to 40 minutes off the transfer.

The speedboat crossing across the Andaman Sea

From Thap Lamu the crossing takes about 90 minutes on a large multi-engine speedboat. The Andaman is usually flat in the open season, but the last stretch into open water can get choppy. I recommend sitting mid-boat and keeping a dry bag for your phone. If you are prone to seasickness, take a tablet 30 minutes before boarding. Larger catamaran services trade speed for a smoother, slower ride.

A typical Similan day-trip timeline

No two operators run the identical route, but the rhythm is consistent. Here is how a standard speedboat day unfolds:

1. 6:00am to 7:00am: hotel pickup in Phuket and minibus transfer north.
2. 8:30am: check-in and safety briefing at Thap Lamu Pier.
3. 9:00am: speedboat departs for the islands.
4. 10:30am: first snorkelling stop, often near Ko Miang or Ko Payu.
5. 12:30pm: lunch and beach time on Ko Miang (Island 4) or Ko Similan (Island 8).
6. 2:00pm: second snorkelling stop and the Sail Rock viewpoint climb on Ko Similan.
7. 3:30pm: speedboat returns to Thap Lamu Pier.
8. 6:00pm to 7:00pm: hotel drop-off in Phuket.

If you would rather stay on the water all day, our guide to the best Phuket speedboat tours compares the operators and routes that run this coast.

Explore Phuket speedboat tours with EVE to match the boat to the day you want.

Most Similan day trips visit two or three of the accessible islands, centred on Ko Miang (Island 4), where the park headquarters and restaurant sit, and Ko Similan (Island 8), the largest island and home to the famous Sail Rock viewpoint and Donald Duck Bay. Snorkellers stay near the surface reefs, while certified divers can book a separate diving day trip to deeper sites.

Ko Miang, Ko Similan and Donald Duck Bay

Ko Miang (Island 4) holds the park's headquarters, its only restaurant, and the ranger station, so most tours land here for lunch. Ko Similan (Island 8) is the postcard. A short, sweaty scramble up granite boulders leads to Sail Rock, the balancing stone that appears on nearly every Similan photo, with Donald Duck Bay curving below it. Since the park removed all overnight accommodation, every visitor you meet is a day-tripper like you.

"The decision to limit the number of daily visitors to the island at 3,325 plus another 525 visitors for scuba diving was intended to preserve the environment and ecology of the island."Songtham Suksawang, Director of the National Park Office, via Thai PBS World

The best snorkelling and dive sites

For snorkellers, the shallow granite reefs off Ko Miang and around Ko Payu deliver the classic Similan scene: hard-coral gardens, giant clams and reef fish in bathwater-warm shallows. Divers go deeper and further. Sites like Elephant Head Rock, a maze of granite swim-throughs between Islands 7 and 8, and East of Eden are why the wider Similan and Surin area, including the legendary Richelieu Rock further north, draws divers worldwide. If diving is your priority, our roundup of the best Phuket diving sites puts the Similans in context.

Green and hawksbill turtles graze the seagrass off Ko Hu Yong at the southern end, and February through April tends to bring the calmest water and the best visibility for spotting them. Manta rays and, in rare seasons, whale sharks pass the northern sites, though those sightings favour divers over day snorkellers.

Snorkelling day trip versus diving day trip

The choice is simple. A snorkelling day trip is the default: no certification, all the beach time, and enough reef to fill the memory card. A diving day trip swaps beach hours for two or three dives and needs an Open Water certificate. In our experience, families and first-timers should book the snorkelling trip and save the dive sites for a dedicated liveaboard, where you can reach Richelieu Rock and Ko Bon without racing the clock.

A Similan Islands day trip from Phuket by speedboat typically costs between 2,500 and 3,500 THB per adult, including hotel transfers, lunch, snorkelling gear and the guide, but excluding the national park entrance fee. Foreign adults pay a separate 500 THB park fee, so budget the full amount when you compare operators. Updated September 2026.

What does a Similan day trip cost?

Prices cluster by boat type and how much is bundled in. As of the 2025-26 season, TAT-licensed operators such as Love Andaman advertise speedboat day trips from around 2,500 THB, with premium catamaran and small-group options costing more. The table below breaks down a typical day.