Similan Islands Snorkeling: Day Trip vs Liveaboard, Best Sites & Season

Featured image: No Troubles Just Bubbles, CC BY-SA 4.0, via Wikimedia Commons.

When you can snorkel the Similans

Mu Ko Similan National Park closes for the monsoon months and reopens on dates the park authority sets. Check the Department of National Parks for the current season before you pay a deposit.

Day trip vs snorkel-only liveaboard

A day trip leaves from Thap Lamu pier in the morning and returns the same evening. A snorkel-only liveaboard runs 3 days and 3 nights and reaches farther sites. Prices and hours checked November 2026: ticket sellers list day trips for non-Thai visitors from ฿2,200. One operator lists its 3-day, 3-night snorkeling liveaboard at ฿16,650 per person. Read our day trip guide if you are leaning toward the shorter option.

Best snorkeling spots and what to expect

Day boats focus on the Similan bays where the water is shallow and the reef starts close to the beach. Honeymoon Bay on Koh Miang and Donald Duck Bay on Koh Similan are the two most commonly named stops. Beach areas where boats anchor for lunch usually have easy entry and a shallow reef edge. Water clarity and warmth change through the open season, so skim our water temperature guide before choosing a month.

• Honeymoon Bay, Koh Miang: sheltered bay with a shallow reef near the beach.
• Donald Duck Bay, Koh Similan: popular day-boat stop with beach access.
• Koh Bon: operator itineraries list The Ridge and The Bay. Ask which one is a snorkel stop.
• Koh Tachai: the Pinnacle is a dive-site name. Ask the operator whether snorkelers are taken there.
• Surin bays: operator itineraries list Chong Kad, Kra Thing and Mai Ngam bays for snorkelers.

Comparing Similan and Surin snorkeling areas

Liveaboards often add Surin stops to a Similan route. If you are choosing between the two areas, read our Similan versus Surin comparison. Sites on pinnacles and ridges can mean current and drop-offs, so they suit confident swimmers only. Mixed dive and snorkel boats can work well. Divers get the deep walls, and our diving guide covers what they see.

Getting there: Thap Lamu pier from Khao Lak or Phuket

All Similan boats leave from Thap Lamu pier in Phang Nga province. From Phuket the drive is about 1.5 to 2 hours, roughly 100 km. From Khao Lak it is about 20 minutes. The boat crossing takes about 1.5 hours. Staying in Khao Lak means a much later wake-up than a Phuket pickup. Our Phuket transfer guide covers pickups and timing.

Costs and fees: what is included, what is not

Two charges sit inside most prices: the operator fee and the national park fee. Ticket sellers list the park fee for foreign visitors at ฿500 per adult and ฿300 per child. Many operators build it into the tour price, so ask whether it is already included. Liveaboard listings typically include meals, drinking water, tea, coffee and hotel transfers. Soft drinks and beer are usually extra. A master cabin on the same 3-night liveaboard is listed at ฿19,600. Ask for an itemized quote that separates fee, transfer and gear.

Safety, gear and reef etiquette

Pack sunscreen, a hat, sunglasses, swimwear, a waterproof bag and a camera. Add a rash vest, because boat decks and open water give little shade. Weak swimmers should ask about flotation and in-water guides before booking. Never stand on or touch coral, and keep fins away from the reef. Sightings are never guaranteed. Our whale shark guide explains what is realistic.

Mistakes to avoid and who should skip it

Most disappointments come from the booking, not the sea. Use the list below before you pay.

• Booking a diver-oriented boat without asking how much time snorkelers get in the water.
• Skipping a rash vest and sun protection on an all-day trip.
• Standing on coral to rest or adjust a mask.
• Expecting manta rays or whale sharks on demand.
• Skip it if you are a very weak swimmer, prone to seasickness on long speedboat crossings, or need a flexible schedule.