Similan or Phi Phi? How to Choose the Right Island Day from Phuket

Published 1 November 2026 · 9 min read

You have one free day left, two brochures on the hotel bed and a partner asking which one. One shows tall limestone cliffs and a lagoon, the other shows granite boulders and water so clear it looks fake. The question of Similan or Phi Phi comes up in almost every Phuket holiday, and the right answer depends more on you than on the islands.

I have done both trips many times and sent a lot of friends on each. Some came back saying the Similans were the best day of their trip, others said they would never do a day that long again. This guide compares the two honestly, so you can choose without regrets.

Similan or Phi Phi: what is the short answer?

Choose the Similans if water clarity and snorkeling matter most, and choose Phi Phi if you want famous scenery and lots of variety. The Similans win underwater, Phi Phi wins on landscapes and convenience.

That is the core of it. The Similans are a remote national park far out in the Andaman Sea, with white sand, giant granite boulders and some of the healthiest reefs you can reach in a day. Phi Phi is closer, with dramatic limestone cliffs, lagoons, caves and the famous Maya Bay from the film The Beach.

The other big factor is the calendar. The Similans are only open in the dry season, while Phi Phi runs most of the year. If you are in Phuket in the closed months, the choice is made for you.

Which has clearer water and better snorkeling?

The Similans, clearly. For snorkeling, the Similans are in a different league, with visibility and reef life you will not find closer to Phuket.

The Similan reefs are famous for a reason. In 1989 Jacques Cousteau called them one of the most beautiful diving sites in the world. On the day trip you snorkel near Ko Bangu, known for underwater caverns and marine life such as rays, moray eels and angelfish, and at Ko Payu, where sea turtles are often seen.

Phi Phi has good snorkeling too, just not at the same level. The tour includes a coral reef stop and a swim in Pileh Lagoon, where the water is deep and clear, reaching around 20 meters. Fish are plentiful and the water is beautiful, but the reefs see far more boats and swimmers.

If you have snorkeled a lot elsewhere, or you plan your holidays around underwater life, the Similans will feel worth every hour. If snorkeling is just one part of a fun day for you, Phi Phi is more than enough.

Divers should think about this separately. A snorkel day only scratches the surface of what the Similans offer, and you may get more from the scuba diving tours from Phuket.

Which has better scenery and more variety?

Phi Phi. The limestone cliffs, lagoons and caves of Phi Phi are the classic Thailand view, and the tour packs in more different places in one day.

A Phi Phi day is a series of famous spots. On the Phi Phi Islands Tour from Phuket, you start at Maya Bay, then swim in Pileh Lagoon, see Viking Cave where swiftlet nests are collected, meet the monkeys at Monkey Beach and snorkel at a coral reef. After a buffet lunch on Phi Phi Don, you finish at Khai, Bamboo or Maiton island.

The Similans have their own beauty, but it is a different kind. Huge smooth granite boulders, powder-white sand and water in every shade of blue. The highlight on land is the short climb to Sail Rock viewpoint above Donald Duck Bay on Ko Similan, which is spectacular.

If you love photos of towering cliffs and want many different scenes, Phi Phi will make you happier. If you prefer a wilder, emptier feel and do not need variety, the Similans are the more unusual choice.

One more thing to know about Phi Phi scenery: Maya Bay is now a look, walk and photo stop under the national park rules, not a swim stop. The swimming on the Phi Phi day happens at Pileh Lagoon, the reef and the final beach. Go in expecting that, and the famous beach will not disappoint.

How busy are they, and how long is the day?

Phi Phi is busier and shorter; the Similans are quieter but the day is much longer. The Similan trip takes about 11 hours, the Phi Phi tour about 9, and that difference is felt in the early start.

Phi Phi is one of the most visited places in Thailand. Maya Bay in particular gets a lot of boats, which is why the Phi Phi tour goes there first, before the midday rush. The rest of the day is busy too, but the fast speedboat lets you move on quickly when a stop gets crowded.

The Similans feel wilder, because they are far out at sea and the park controls visitor numbers. That does not mean empty: the main beach at Donald Duck Bay gets many boats in high season. But the reefs and the open water around them feel far less crowded than Phi Phi.

The length of day is the honest downside of the Similans. You leave very early, drive north to Thap Lamu Pier in Phang Nga, then cross open sea. If you stay in the south of Phuket, the day starts in the dark and ends after sunset. For Phi Phi, the run to the islands is shorter, and the day feels more relaxed.

A Similan day in short

Minivan pickup in the early morning, the drive north to Thap Lamu Pier, a light snack and briefing, then the speedboat out. You snorkel at Ko Bangu, land at Donald Duck Bay on Ko Similan and climb to Sail Rock, snorkel again at Ko Payu, and have lunch on Ko Miang, where the park rangers are based. Then it is the long way home.

A Phi Phi day in short

Hotel pickup, tea or coffee at the pier while the guide explains the day, and a speedboat straight to Maya Bay. From there the stops come quickly: Pileh Lagoon, Viking Cave, Monkey Beach and a reef snorkel. Lunch is a buffet on Phi Phi Don with free time on the beach, and the last stop is Khai, Bamboo or Maiton island before the ride back.

Lunch is a small but real difference. On Phi Phi you eat a buffet in a lively island village, with time to wander afterwards. On the Similans you eat Thai and European dishes at a simple beachside cafe inside the national park, surrounded by trees and very little else. Some people love the village buzz, others prefer the quiet.

When can you go: how do the seasons compare?

The Similans are open only roughly from mid-October to mid-May, while Phi Phi runs most of the year. This alone decides the question for many travellers.

The good news is that the Similan season overlaps with the best months on Phuket in general. From around December to March the sea is usually calm, the sky is clear and both trips are at their best. That is also high season, so book a few days ahead if you have fixed dates.

The Similan Islands National Park is closed every year from about mid-May to mid-October. The official visitor season usually runs from 15 October to 15 May, but dates are set by the park, so always check. No Similan day trips run during the closure.

Phi Phi tours run through most of the year, though the rainy months bring rougher sea and some days with changed routes. Maya Bay itself has its own yearly closure period, so check what is open on your date. The rest of the Phi Phi route still runs when the weather allows.

Even in season, the Similans are more sensitive to weather, because the crossing is long and in open water. Trips can be cancelled for safety. My tip: if the Similans are your dream, book them early in your stay so you have a backup date.

Which is easier for families and seasick travellers?

Phi Phi is easier for most families and for people who get seasick. The shorter day and shorter sea crossing make Phi Phi the safer choice for mixed groups.

The Similan crossing is open sea, and on choppy days it is a long, bouncy ride. If anyone in your group gets seasick easily, that is a real consideration. Tablets taken before pickup and seats at the back help, but they do not make a rough sea calm.

Young children also find the Similan day hard, mainly because of the early start and the long transfer. Older kids who swim well often love it, especially the turtles. For toddlers, pregnant travellers or anyone with back problems, I would choose Phi Phi on a calm day, or a gentler trip closer to Phuket.

Phi Phi has its own benefits for families: Monkey Beach, the short boat hops and shallow beaches at the end of the day. It keeps kids entertained, and if someone gets tired, the next stop is never far.

Which should you choose? Picks by traveller type

Here is my honest pick for each kind of traveller. If you can only do one and you are not sure, Phi Phi is the safer choice; if you are a keen snorkeler in season, go to the Similans.

• Keen snorkelers and clear-water lovers: Similans.
• First visit to Thailand, want the famous views: Phi Phi.
• Families with young kids: Phi Phi.
• Families with older kids who swim well: Similans, in mid-season.
• People prone to seasickness: Phi Phi, on a calm day.
• Photographers: Phi Phi for cliffs and lagoons, Similans for boulders and water colour.
• Already seen Phi Phi on a past trip: Similans.
• Visiting mid-May to mid-October: Phi Phi, because the Similans are closed.
• Tight budget: Phi Phi, which starts lower.

The Phi Phi tour suits first-timers and families who want famous scenery and variety. The Similan tour suits snorkelers and anyone who wants the clearest water in a day from Phuket.

If you are still undecided between Phi Phi and a calmer limestone day, I compared those two in Phi Phi or James Bond Island: which tour is better.

Practical tips before you book either trip

A few simple steps make either day much better. Most of them are about timing and the sea.

Check the forecast the day before, and ask on WhatsApp if the sea looks rough. Both tours include hotel transfer, snorkeling gear, drinks, lunch and a guide, so you only need a swimsuit, a towel, reef-friendly sunscreen, a hat and a dry bag for your phone. Take seasickness tablets before pickup if you need them.

For the Similans, book the Similan Islands Tour from Phuket early in your stay, so a weather cancellation does not cost you the trip. For Phi Phi, any day works, but calm dry-season mornings are the most pleasant. And if you have time for more, the top 5 Phuket tours list is a good way to plan the rest of your week.

Frequently asked questions

Can I do both Similan and Phi Phi in one holiday?

Yes, and many people do, if they visit in the Similan season. Put a rest day between them, because both are full days on the sea. Book the Similans first so you have time to move the date if the weather turns.

Which is better for a honeymoon, Similan or Phi Phi?

Couples who love snorkeling and quieter nature usually prefer the Similans. Couples who want classic views and plenty of photo spots tend to enjoy Phi Phi more. Both are romantic on a calm, sunny day.

Are the Similans worth the extra cost and time?

For snorkelers and people who love clear water, yes. For travellers who mainly want famous views and an easy day, probably not. It depends on whether the underwater part is what you care about most.

Is Phi Phi too touristy?

It is busy, especially around Maya Bay, and there is no hiding that. Going early, as the tour does, helps a lot. The cliffs and lagoons are still worth seeing despite the crowds.

Can you see sea turtles on the Phi Phi tour?

Turtles are possible around Phi Phi but not common. The Similans, especially Ko Payu, give you a much better chance. If turtles are your goal, choose the Similans.

Which trip is better in April?

Both run in April, and the sea is usually calm then. The Similans are at their clearest in the dry season, so April is a good month for them, before the park closes in May. Phi Phi is also lovely, just busier.

Do I need to be a strong swimmer for either trip?

No. Life jackets are provided on both, and you can snorkel while floating in one. The open-water snorkel stops in the Similans feel more serious, so weak swimmers should stay close to the boat.

Updated 1 November 2026.