Ha Long Bay on a dental trip: day trip or cruise, and when to go

Ha Long Bay is a bay of limestone islands and caves in Quảng Ninh, north-east Vietnam, and the best-known day trip from Hanoi. Vietnam's tourism board puts it at about two to two and a half hours by road from the capital. On a dental trip, visit Ha Long Bay before treatment starts or after your final check, either as a long day trip or on a cruise of one or two nights. Keep it away from the days just after an extraction or implant surgery, and leave swimming and kayaking until your dentist says you've healed.

What Ha Long Bay is

The bay covers about 1,553 square kilometres, according to Wikipedia, and is filled with limestone islands and islets. Counts differ between sources: Vietnam's tourism board and Wikipedia give figures from about 1,600 islands to nearly 2,000 islets. Many have caves with old rock formations, and some, such as Sửng Sốt, Thiên Cung and Đầu Gỗ, carry local legends.

UNESCO first listed Ha Long Bay as a World Heritage Site in 1994, and again in 2000. In September 2023 the listing was extended to a joint site, Ha Long Bay and the Cat Ba Archipelago, which Vietnam's tourism board describes as the country's first World Heritage Site to cross provincial borders. Bai Tu Long Bay lies to the north-east, and Lan Ha Bay and Cat Ba Island to the south.

When to fit it around treatment

A trip to the bay means a long day on the road and on a boat, far from your clinic. That's fine before treatment starts, on days when the dental lab is making your crowns or veneers, or once your dentist has done the final check. It's a poor fit for the days just after surgery.

Stage of your trip	Ha Long Bay?
Before your first appointment	Good. A day trip or a cruise both work.
Lab days, while crowns or veneers are being made	Good for a day trip if you feel well and have no appointment the next morning.
The day of an extraction or implant surgery	No. Rest near your hotel.
The first two or three days after surgery	Better avoided. MedlinePlus advises avoiding heavy activity for the first couple of days.
After your final check	Good. A cruise of one or two nights fits well here.

If you're having implants, our guide to planning your visits shows where the free days usually fall on each trip. The trip planner builds a sample day-by-day schedule for your treatment and city.

Getting there from Hanoi

Vietnam's tourism board says the bay is about two hours from Hanoi on one page and about two and a half hours on another, so allow for the longer figure. Cruises leave from Tuan Chau and Bai Chay ports. For a day trip, the tourism board suggests leaving Hanoi very early. Most visitors book a tour that includes the road transfer, the boat and meals.

Plan for a long day. If you have an appointment the next morning, ask your clinic whether a late return will be a problem, and keep the trip for a day with nothing booked afterwards if you can.

Day trip or overnight cruise

Vietnam's tourism board lists three common choices: a full day of cruising, two days and one night, or three days and two nights. Overnight boats include a cabin, meals and activities, and the bay at sunset and early morning is the highlight of many trips.

	Day trip	One-night cruise	Two-night cruise
Free days you need	One	Two	Three
Time away from your clinic	One long day	Overnight	Two nights
Best point in a dental trip	Before treatment, or a lab day	Before treatment, or after your final check	After your final check
Sunset and sunrise on the bay	No	Yes	Yes

On a treatment trip, a day trip is the simpler choice, because it needs only one free day and you sleep near your clinic. A cruise fits better at the start of your stay or after your last appointment, when you have nothing to come back for.

What to do on the bay

The tourism board lists these activities. The table shows which ones need you to be fully healed.

Activity	What it is	OK after recent dental work?
Cruising and the sun deck	Watching the islands pass, sunset and morning views	Yes, if you feel well
Caves	Walking through caves, some large and some tight	Yes, at a gentle pace
Floating village tours	A boat trip around a fishing village	Yes
Kayaking	Paddling to lagoons and fishing boats, often just before sunset	Wait until you've healed
Swimming	Off the boat or at a beach stop	Wait until your dentist says the wound has closed
Rock climbing and deep water soloing	Climbing routes on the cliffs, popular at Butterfly Island	Wait until you've healed

A 2023 review in the British Dental Journal advises against diving and other activities with pressure changes after dental treatment. Ordinary swimming isn't diving, but after an extraction or implant surgery, ask your dentist before you get in the water.

Boat safety

The UK government's travel advice has a specific warning about the bay. It says to consider safety standards carefully before taking an overnight boat trip on Halong Bay, because overcrowding and poor safety standards have led to accidents in past years, and some boats have sunk quickly. It also advises you to:

• check the boat's safety record and registration with your tour company
• ask about the crew's certification
• get a full safety briefing, and make sure you have a life jacket

Booking through an established operator and reading recent reviews helps. Vietnam's tourism board says you can book through an agent, directly on a boat's website, or through booking sites.

The best time to visit

Vietnam's tourism board recommends March and April and September to November for clear, calm days on the bay. Summer is hot and humid with a chance of storms, and winter is cooler and drier, often with a light mist. The UK government says tropical cyclones usually affect Vietnam's eastern coast from May to November, and trips can be cancelled in bad weather.

If your treatment dates fall in the storm season, keep the bay for early in your stay, so a cancelled trip can move to another day. Our guide to the best time to visit Vietnam compares the seasons for each region.

Eating on a cruise after treatment

Cruise meals are included in most packages and are often seafood. If you've had recent surgery, tell the operator when you book that you need soft food, such as soup, steamed fish or rice porridge, and skip shellfish that needs a lot of chewing. Our guide to soft food after dental surgery lists what to eat and what to avoid.

Ha Long Bay checklist

• Ask your dentist which days are free and when you're fit for a long day out
• Choose a day trip for lab days, and a cruise for before treatment or after your final check
• Check the boat's safety record, registration and life jackets
• Book soft meals if you've had surgery
• Leave swimming, kayaking and climbing until you've healed
• Keep a spare day in the storm season, roughly May to November
• Take your clinic's phone number and your medicines with you

For more ideas closer to your clinic, see things to do in Hanoi. The Hanoi city guide and the clinics in Hanoi that have passed our checks will help you plan the rest of the trip.