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    Koh Hong: Discover Krabi's Hidden Emerald Lagoon

    Koh Hong translates to “Emerald Island,” and the name is perfectly apt. This island features a completely enclosed freshwater lagoon surrounded by dramatic limestone cliffs—a natural wonder that seems almost mythical.

    The experience of paddling through the narrow coral passage into the lagoon and finding yourself surrounded by 200-meter cliff faces with no exit visible is surreal. You’ve entered a hidden world.

    Small Group Tours
    HightLights

    Why Koh Hong?

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    The Magical Lagoon

    The lagoon is the heart of Koh Hong’s appeal. It’s freshwater, enclosed by coral formations and limestone cliffs, and creates a sense of being in a secret place. The water is incredibly calm and peaceful.

    Paddling into the lagoon is an adventure in itself. You navigate through a narrow passage in the coral reef, and suddenly you’re in this enclosed world with the sky above and cliffs surrounding you.

    Dramatic Natural Setting

    The limestone cliffs rising around the lagoon create an almost otherworldly setting. The rock formations show geological patterns and colors—striations, vegetation, natural weathering patterns.

    It’s one of the most visually dramatic locations in Krabi.

    Snorkeling and Marine Life

    The coral passage and outer reefs host diverse marine life. Snorkeling here reveals healthy coral ecosystems and colorful fish.

    Unique Experience

    Koh Hong offers an experience you can’t get anywhere else. It’s not just a beach; it’s an enclosed natural wonder that creates a sense of discovery and adventure.

    Experience

    What You’ll Experience at the Koh Hong

    What You'll Experience

    What You'll Experience

    The Paddle Through the Coral Passage

    This is the signature Koh Hong experience. You’ll paddle (or be paddled on a canoe) through the narrow coral passage. It’s not dangerous, but it is thrilling—the passage is shallow and narrow, creating a sense of entering a hidden realm.

    What You'll Experience

    What You'll Experience

    Time in the Lagoon

    Once inside the lagoon, time feels different. The cliffs rise around you. The water is still and reflective. You can swim, float, or simply sit and absorb the surreal beauty.

    Outer Reef Snorkeling

    Outside the lagoon, you’ll snorkel the outer reefs where marine life is abundant.

    Your Experience

    Who and When to visit Koh Hong

    Best Time to Visit Koh Hong

    High Season (Nov-Feb):

    Calm seas ideal for lagoon paddling.

    Shoulder Season (Mar-May):

    Excellent, fewer tourists.

    Rainy Season (Jun-Oct):

    Possible, but seas can be rough.

    Who Should Visit

    Koh Hong works for adventurous travelers, photographers, snorkelers, and anyone seeking unique experiences. If you're uncomfortable with confined spaces or narrow passages, discuss with guides before booking.

    What Our Guests Say

    TripAdvisor★★★★★

    Yet another perfect tour with Team Simba. (DO NOT BE PUT OFF BY THE EARLY START TO THE DAY ITS DEFINITELY WORTH IT!!). Today Joseph, Captain & David took us on a brilliant boat trip with something for everyone. They stopped the boat en-route to Maya Bay to allow us to watch the sunrise. Amongst the first to arrive at Maya Bay, it was such a beautiful and peaceful place to enjoy the tasty breakfast, Simba provided. The stop by the monkeys and Viking Cave were interesting. The snorkelling was wonderful. It felt like you were swimming in a fish tank with all the beautiful fish. Joseph went out of his way to point out squid and other fish to us. A final stop on the beach to dry out before lunch was lovely. Lunch at the Yacht Club was perfect. They catered for our food allergies and was a perfect way to round off the day before the driver took us back to our accommodation. THANK YOU - what a special team of people you all are.

    Cameronv77

    3 days ago

    Google★★★★★

    Incredible experience with Simba. Although they are more expensive than other providers they are well worth the experience. They take a max of 18 people, although we only had 8 and 3 staff. Our captain, guide Noi Noi and deckhand David. All 3 were incredible and Noi Noi and David would get in the water and point out the sharks, snakes and fish for us to see. Being one of the first on Maya Bay meant less crowds and great photo opportunities. Then at every stop there after we were one of very few boats or the only people. The snacks were plentiful on the boat and the lunch back at the Marina was some of the best Thai we’ve had. Overall this was an incredible experience and a trip definitely paying additional for.

    Lauren Milner

    2 weeks ago

    GetYourGuide★★★★★

    An Absolutely Unforgettable Experience – Highly Recommended! This was truly one of the most incredible experiences of my life! A huge thank you to the entire Simba Sea Trips team, especially our wonderful tour guide, Mr. Noi, who was exceptionally kind, attentive, and knowledgeable throughout the day. We saw baby sharks, clownfish, and stunning rainbow-colored tropical fish while snorkeling. It honestly felt like swimming in an aquarium! The team knew exactly where to find the different marine species and guided us to the best spots, making the experience even more special. Everything was perfectly organized, from the snorkeling equipment and fins to the constant snacks and refreshments. The boat was extremely comfortable, and every little detail was thoughtfully taken care of. We couldn’t have asked for a better experience! It was truly magical, and we will remember this day forever. If you’re visiting Phuket, this tour is an absolute must! Thank you, Simba Sea Trips, and espec

    MELISA

    4 days ago

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