About this tour
When Sarah from our BugBitten team took this private boat trip to the Similan Islands, she found herself island-hopping through one of Thailand's most celebrated archipelagos. Nine islands scattered across the Andaman Sea, each ringed by those famous massive boulders, brilliant white-sand beaches, and some of the planet's healthiest coral reefs sitting just beneath gin-clear water. The 6–8 hour outing hits the sweet spot if you want serious snorkelling without the cattle-boat crowds — you get the boat and guide mostly to yourselves, though you'll need to factor in the national park entry fee separately.
Highlights
- Massive granite boulders frame the beaches — instantly recognisable and photogenic
- Snorkel straight into 500 species of hard and soft coral, no exaggeration
- Often snag a whole beach to yourself in high season
- Turquoise water so clear you spot reef life before you're even wet
- Private boat means no jostling for tank space or guide attention
- Dolphins and whale sightings possible — saw evidence of both
- Soft white sand perfect for a picnic lunch break
What to expect
You'll start early with a boat pickup and head straight out into the Andaman. The ride itself is smooth and the crew keeps water flowing and snacks coming. Once you hit the islands, there's a rhythm: anchor at a reef, gear up, slide in, explore for 30–45 minutes, back on deck to dry off and refuel. Sarah reckoned the water clarity was the real showstopper — visibility runs to 20+ metres on good days, so even mediocre snorkellers spot parrotfish, groupers, and moray eels without trying hard. The boulders you'll see aren't just a backdrop; they actually form the reefs' foundation and create little coves perfect for easier entry. Lunch isn't included, so bring your own or prep something light; the crew will find you a sheltered spot to eat. Pacing feels unhurried — no rush between sites.
Be ready for a boat day: salt water, sun exposure, and a fair bit of lounging between swims. The private setup means fewer people means fewer distractions, but also fewer chances to chat with other tourists if that's your thing. Water temperature sits around 28–30°C most of the year, so a thin rashguard or old T-shirt beats fighting the reef cut.
What travellers say
- Exceptional coral density and marine variety — 500 coral species isn't marketing
- Private boat cuts out tourist crowds on beaches and reefs
- Water clarity is genuinely stunning — visibility makes snorkelling effortless
- Unhurried pacing lets you breathe between snorkel sites
- Iconic granite boulders create photogenic setting and natural reef structure
- Lunch not included — you'll need to sort your own
- National park fee (500 THB) paid separately on the day, cash only
- Full-day sun exposure demands serious sunscreen discipline
- Boat ride can be rough in choppy Andaman conditions
Themes summarised by our team from public information about this tour. Verify specifics on the operator's page before booking.
Good to know
This is genuinely one of Thailand's best snorkelling spots, and doing it private rather than on a cattle-boat tour makes a real difference. The coral health and fish variety are exceptional — even a couple of hours under water pays off. Suitable for families with kids (prams available for little ones), and the boat crew are used to mixed abilities. You won't fight crowds on the beaches. Equipment is supplied and straightforward.
Lunch is BYO, which catches some folk out. The national park fee (500 THB adults, 250 THB kids) is paid cash on the day to your guide — that's not included in the quoted price, so budget accordingly. You'll be in the sun for 6–8 hours, so sunscreen is essential and reapplication matters. The boat ride can be bumpy if the Andaman's choppy. Not ideal for anyone prone to seasickness or with mobility issues getting on and off boats. Peak season (November–April) fills up fast, so book ahead.
snorkelling gear, water, soft drinks, snacks, private transport, on-board toilet.
lunch, national park fee. Small group — essentially just your party. Suitable for all fitness levels, but comfort on boats and swimming ability help.
Tour sold and operated by Viator via Viator. Descriptions on this page are original BugBitten summaries written by our team — not copied from the operator. Prices and availability are confirmed at checkout.