The Ha Long Bay cruise guide, from the data

Almost everything written about a Ha Long cruise is written to sell one. We came at it the other way. We publish 92 overnight boats, recorded what they publish and what they hide, and classified 10,568 guest reviews of 70 boats by subject (counted 28 October 2026). This page is the short version of what that turned up, laid out as the decisions you have to make in roughly the order you make them. Each section points to the fuller guide behind it.

First, which bay

The name Ha Long now covers three bays, and where the fleet sails has shifted. Of the 92 boats, forty-six sail Lan Ha, thirty-one sail Ha Long proper, and fifteen sail Bai Tu Long. Lan Ha is the default now rather than the alternative, and Bai Tu Long is the quiet one: fewer boats, fewer of them in your photographs, and guests’ reviews agree once you read their tone, as the quietest bay shows. The three are close together and genuinely different on the water, and the choice matters more than the marketing lets on. Our guide to the three bays sets out what each one trades away.

Then, the boat

Two things you would expect to separate the boats do not. Kayaks are on ninety of the 92, and a jacuzzi on sixty-three, so choosing a boat on either is choosing on something that barely varies. What does vary is size and age. The fleet runs from four cabins to fifty-six, and the price hardly moves across that range, which makes how many other people share your boat one of the few things you can pick without paying for it. Age is murkier: the boats with a settled launch year span 2007 to this year, but the number that would actually tell you about condition, the last refit date, is in print for only seven of the 92.

How long, and where you leave from

All but five of the boats we publish sell a three-day two-night trip, the exceptions being Bhaya Classic, Cozy Bay Grand, Ginger, La Regina Classic and Secret Halong, and all but one, Heritage Line Violet, sell two days and one night. On the rates one listing publishes for 66 of them (read on 28 October 2026 for 58 and on 6 August for the other eight), the three-day trip costs close to double the two-day one, so the choice between them is whether a second full day on the water is worth nearly the price of the first. The harbour is quieter and more useful than it looks: all 92 have one on our records (counted 22 October 2026), all but Venezia on the Ha Long City side, and thirteen of the fifteen Bai Tu Long boats leave from the international cruise port at Bai Chay. Our guide to which harbour you leave from turns that into a shortcut, and the one to Cat Ba and Ha Long City covers where your spare hours go.

What it costs, and what it does not

The advertised price is usually the cheapest cabin for two, halved. Across the 83 boats we publish with a two-day rate it runs from $105 to $423 per person, two sharing, on sheets read between 6 August and 28 October 2026, all but six of them on 28 October. A couple pays twice the headline before choosing a better room, and what a single guest pays is set out in cruising solo. Our guide to what a cruise costs untangles the two price bases. The fare is also narrower than it looks: only three of 139 listings include the Hanoi transfer, the single biggest cost most people forget, which is why what is not included matters as much as the headline rate. And the cancellation terms vary more than anything else on the market: among the 36 operators that print their own ladder, the free window runs from 72 hours to 45 days before departure.

What the reviews actually reveal

Here is the finding that surprised us most. Food is the most discussed subject on board after the crew, and it tells you little: guests raise it only a little more often after a bad trip than after a good one, in 57% of one and two star reviews against 47% of five star ones. What separates a one star trip from a five star one is quieter and invisible in a photograph. A cut itinerary appears in 33% of angry reviews and 2% of happy ones. Surprise charges and booking trouble follow the same pattern. Our guide to what guests complain about lays out all of it, and the companion guide to life on board shows the same truth from the other side: the thing that makes a good trip is the crew, named in 85% of five star reviews, and it is the part you can least buy your way to.

When to go, and what to do there

Season is real but smaller than the advice suggests. The month-by-month picture in when to cruise shows the differences are modest next to the difference a boat makes, with one genuine outlier worth knowing about. On the water, the stops are more alike than the brochures pretend: the caves and islands guide counts which the fleet actually visits, and why the most famous ones are the most crowded. Our guide to things to do in Ha Long Bay counts the activities on each boat’s itinerary, and the winter months have guides of their own, December and January.

The three questions that settle most of it

If you read nothing else, ask these before you pay, because they cover most of what goes wrong:

Is the Hanoi transfer included, and in what vehicle. What happens if a stop or a day is missed. And what is not covered by the fare once you are aboard, drinks especially. Three of 139 listings include the transfer, a cut itinerary is one of the sharpest markers of a bad trip, and surprise charges are the third of the three invisible complaints. Every one of those is answerable in an email, and the speed of the reply is itself a preview of the operator.

The catch

The catch is that the evidence is uneven from boat to boat. Seventy-three of the 92 boats we publish have guest reviews in our records (counted 28 October 2026), and a boat with years of written record gives you more to judge by than one launched last season. The review labels are machine-assigned, scored before we trusted them, and two of them under-count, so the complaint figures here are floors rather than exact shares. And a per-person price is a floor, not a quote: the number for your date and cabin lives with the operator and is almost always higher.

Common questions

What is the most important choice? The boat, then the bay. Season and month matter less than either. A good boat in a fair month beats a mediocre one in the perfect week.

What is the biggest hidden cost? The Hanoi transfer. The expressway drive is about two and a half hours, but a shared shuttle doing its hotel round takes about three and a half each way, and the transfer is in the fare on only three of 139 listings.

How do I spot a boat that will disappoint me? Not by the food reviews, which mean little. Read the newest reviews for cut itineraries, surprise charges and booking trouble, the three things that actually mark a bad trip.

Two days or three? Two days sees the headline of the bay; three days lets you spend time in it. Budget for close to double: on the 66 boats one listing prices both ways, read on 28 October 2026 for 58 of them and on 6 August for eight, the second night cost about 94% of the first.