- ✓The Hong Islands are a cluster of soaring limestone islands inside Than Bok Khorani / Mu Ko Hong national-park waters, visited as a half- or full-day boat tour from Ao Nang or Krabi — not a place you stay.
- ✓Two sights make the trip: the Hong lagoon — a near-enclosed pool of green water ringed by cliffs, reached through a narrow gap and best near high tide — and the 360-degree viewpoint up a short, steep boardwalk and stair climb.
- ✓You can go by shared group boat (cheapest, busiest, fixed stops), private long-tail (your own pace, time the crowds out) or speedboat (faster, covers more islands) — the choice is about budget and how much you mind sharing.
- ✓There's a national-park fee on top of the tour price, and it's usually NOT included in the headline tour cost — budget for it separately and verify the current amount, as park fees change.
- ✓Hong is the calmer, closer, more scenic-lagoon alternative to a long Phi Phi day from Krabi — less beach-bar buzz, more dramatic limestone, and a shorter day on the water.
What the Hong Islands are — and why people go
The Hong Islands are a small archipelago of steep, jungle-topped limestone islands off the Krabi coast, sitting in protected national-park waters between the mainland and Koh Yao. 'Hong' means 'room' in Thai, and the name comes from the islands' signature feature: a hidden, near-enclosed lagoon on the main island, walled by cliffs and reached through a narrow channel, that opens up like a secret room once you're inside. It's the kind of dramatic, sculptural scenery the Andaman is famous for, and it's the reason this is one of Krabi's most popular day trips.
Nobody stays on the Hong Islands — there's no accommodation, just beaches, the lagoon and a viewpoint trail — so a visit is always a boat tour out and back from the mainland. That makes this page a how-to-visit guide rather than a destination guide: the decisions are about which tour format to take, when to go, what it costs, and whether Hong or another island circuit is the better use of your water day.
The two unmissable moments are the lagoon and the viewpoint. The lagoon is calm, shallow and a vivid green when the light's right, and it's best entered near high tide when there's enough water in the channel. The viewpoint, up a short but steep boardwalk-and-stair climb on the main island, delivers a 360-degree look down over the whole cluster — the classic Hong Islands photograph. Most tours give you time for both, plus a beach stop and some snorkelling.
How to visit — group, private or speedboat
There are three ways to do the Hong Islands, and choosing between them is the main planning decision. A shared group tour is the cheapest and most common: you join a boat of other travellers on a fixed route — usually the lagoon, the viewpoint, a beach stop and a snorkel — with set timings. It's good value and perfectly fine, but you arrive at each spot alongside other boats, so the lagoon and viewpoint can be busy when you're there.
A private long-tail charter is the antidote to crowds. You hire your own boat and boatman for the day, set your own pace, and — crucially — can time your stops to arrive at the lagoon or viewpoint when the group tours aren't there (early, late, or while they're at lunch). It costs more, but split between a couple or a small group it's often the difference between a crowded photo and an empty one. The third option, a speedboat tour, trades long-tail charm for speed: it covers more ground and can fold the Hong Islands into a wider circuit with other islands, good if you want quantity in one day.
Tours leave from Ao Nang and from Krabi-area piers; the exact departure point depends on the operator, so confirm it when you book. Whichever format you pick, the morning is the better half of the day — calmer water, softer light and a head start on the crowds before the midday boats arrive.
Fees, timing and the things that catch people out
The cost most people forget is the national-park fee. The Hong Islands sit inside protected park waters, and there's an entry fee charged on arrival that is usually NOT included in the headline tour price — operators quote the boat, and the park fee is collected separately, often in cash. Budget for it as a distinct line, and verify the current amount before you go, because Thailand's national-park fees are reviewed periodically and any figure you read can be out of date.
Tide is the other timing factor. The lagoon is at its best — fully accessible and most photogenic — near high tide, when there's enough water to enter the channel comfortably; at very low tide it can be shallow and less impressive. Good operators plan their route around the day's tide, but it's worth knowing why your tour might do the viewpoint first and the lagoon later. The beaches, conversely, are widest at lower water.
Two more practicals: the park area has reef and marine life, so reef-safe sunscreen and careful snorkelling matter — these are protected, fragile waters. And in the green season (roughly May–Oct) the seas roughen and some boat days become weather-dependent; the cool dry months are calmer and more reliable. As with everything boat-related on the Andaman, verify sea and boat status the day before in marginal weather.
Hong Islands or Phi Phi? Choosing your Krabi water day
If you only have one big water day from Krabi, the real choice is usually Hong Islands versus a Phi Phi day trip, and they offer different things. The Hong Islands are closer, the day is shorter and calmer, and the draw is dramatic limestone scenery, a hidden lagoon and a viewpoint — it's a scenery-and-snorkel day rather than a beach-bar one, and it leaves you back in Krabi with energy to spare. Phi Phi from Krabi is a longer, busier haul to more famous (and more crowded) beaches like Maya Bay, with a bigger party reputation attached.
For most Krabi visitors who want a beautiful, manageable day on the water, the Hong Islands are the better single pick — less travel, more limestone drama, fewer hours fighting chop. Phi Phi makes more sense if its specific beaches are a bucket-list item, and even then it's arguably better visited as its own overnight than rushed as a day trip from the mainland. The other near-in alternative, the Four Islands tour, is the gentler, more beach-focused day with its low-tide sandbar walk — pick that over Hong if you want easy swimming beaches over dramatic cliffs.
Whichever you choose, treat the water day as the centrepiece of your Krabi trip rather than one of three boat days. One well-chosen island tour, done in the calm of the morning, beats trying to cram the whole Andaman into a single visit.
Sources and official planning resources
Hong Islands tour · at a glanceTour FC
- Best route
- Half- or full-day boat tour from Ao Nang or Krabi — group, private long-tail or speedboat
- Time range
- Half day for the lagoon and viewpoint; full day to add snorkelling and more islands
- Transport modes
- Shared group boat · private long-tail charter · speedboat (verify operator and pier)
- Cost range
- Tour fare plus a separate national-park fee — verify both; the park fee is rarely included
- Best for
- Scenery-and-snorkel travellers wanting dramatic limestone and a shorter day than Phi Phi
- Risk / buffer
- Lagoon entry and the beach depend on the tide; seas roughen in the green season
- Verify source
- Re-check tour prices, the current national-park fee, and sea/boat status before booking
