The Best Dive in the Gulf of Thailand

    Dive Sail Rock

    Hin Bai - the legendary pinnacle. Whale shark territory, the famous vertical Chimney swim-through, and massive schools of fish. A full-day boat trip from Koh Tao, every 3 days.

    ★ Google 4.9 (845 reviews) · TripAdvisor 5.0 (776 reviews)

    Book the Sail Rock TripNext boat: Mon, Aug 24
    We sail every 3 days · upcoming departures
    NEXT BOAT24Aug27Aug30Aug02Sep
    Reserve my spot

    Why Sail Rock is unmissable

    A 90-minute boat ride into open water rewards you with the richest marine life in the Gulf - and the single best chance in Thailand to swim with a whale shark.

    Whale shark chance

    The Gulf's top spot to encounter the gentle giants - Sail Rock draws them in.

    The Chimney

    A thrilling vertical swim-through cutting down through the pinnacle - a signature dive.

    Walls of fish

    Barracuda tornadoes, trevally, batfish and huge schools swirling around the rock.

    3 dives in a day

    Two dives at Sail Rock plus a stop at Shark Island - a complete day on the water.

    ฿4,000
    per person · full-day trip · 3 dives
    + ฿500 underwater photo package (optional)
    Book the Sail Rock TripSecure your spot for Mon, Aug 24
    • ✓Full dive gear & tanks (180-200 bar)
    • ✓Private boat, experienced guides
    • ✓Breakfast + Thai lunch buffet on board
    • ✓Coffee, tea, fresh fruit, cookies
    • ✓Dive insurance included
    • ✓For certified divers

    Want us to hold a spot?

    Leave your name and phone - we'll message you about the next Sail Rock boat.

    Your day on the boat

    07:30
    Depart Koh Tao - breakfast on board as we cruise to the pinnacle
    09:30
    Dive 1 - Sail Rock: the Chimney & the deep pinnacle walls
    11:30
    Dive 2 - Sail Rock: drift the schools, scan the blue for whale sharks
    13:00
    Thai lunch buffet & surface interval
    14:00
    Dive 3 - Shark Island: reef life & blacktip reef sharks
    15:30
    Back to Koh Tao

    4.9 on Google (845) · 5.0 on TripAdvisor (776).

    See what divers say after a day on the Sail Rock boat with us.

    Tripadvisor
    5.0Excellent

    Based on 776+ verified reviews on Tripadvisor

    "There are so many dive schools in Koh Tao and this one is definitely the best. The friendliest instructor ever — best day of our trip!"

    Sarah M.

    🇬🇧 United Kingdom · March 2026

    "Our instructors Chris and Noah were incredible — kind, helpful, funny and patient. We owe a huge thanks to Siam Scuba, easily one of the nicest dive shops in Koh Tao."

    The Johnson Family

    🇺🇸 United States · February 2026

    "Fantastic experience. The staff were incredibly kind and welcoming. Small group meant I got tons of personal attention. Certified in 4 days and already planning my next dive."

    Lucas R.

    🇩🇪 Germany · January 2026

    Read all 776 reviewsWrite a review

    Pick your Sail Rock day

    Reserve a spot with a deposit - we confirm the same day.

    Book the Sail Rock TripOr message us on WhatsApp

    Frequently asked

    The next boat leaves Mon, Aug 24

    Spots on the Sail Rock boat are limited and fill fast. Reserve yours now.

    Book the Sail Rock Trip