Halong Bay vs Lan Ha Bay vs Bai Tu Long: Which Should You Choose?

Halong Bay is the most famous seascape in Vietnam, but it is not the only one. Next to it lie two neighbouring bays with the same limestone islands and emerald water: Lan Ha Bay to the south and Bai Tu Long Bay to the north-east. Choosing between Halong Bay or Lan Ha Bay, or Bai Tu Long, makes a big difference to your experience, from the number of boats around you to the activities you can enjoy.

In this guide we compare the three bays side by side, explain who each one suits best and share our tips for choosing a route.

The three bays at a glance

	Halong Bay	Lan Ha Bay	Bai Tu Long Bay
Location	Central, near Halong City	South, next to Cat Ba Island	North-east of Halong
Crowds	Busiest	Moderate	Quietest
Highlights	Famous caves and viewpoints	Beaches, lagoons, kayaking	Fishing villages, wild scenery
Best for	First-timers who want the icons	Swimming and kayaking	Peace and authenticity
From Hanoi	About 2.5 to 3 hours	About 2.5 to 3 hours	About 3 hours

Halong Bay

Halong Bay was listed as a UNESCO World Heritage Site in 1994 and is the heart of the region, with nearly two thousand islands and islets. Its main attractions are the large caves, such as Sung Sot, the viewpoint on Ti Top Island and the famous rock formations that appear on postcards.

The downside is its popularity. Hundreds of boats follow similar routes, and the most famous caves and beaches can be crowded, especially at midday and on weekends. If seeing the classic sights is important to you, Halong is still worth it; just choose a boat and itinerary that avoid the busiest hours.

Lan Ha Bay

Lan Ha Bay lies south of Halong, around Cat Ba Island, and belongs to the city of Hai Phong. It has the same limestone karsts but far fewer boats, and its many small sandy coves and sheltered lagoons make it perfect for swimming and kayaking. Floating fishing villages still dot the bay, and Cat Ba Island offers forest trails, viewpoints and the village of Viet Hai.

For most of our guests, Lan Ha is the best balance between beauty, peace and activities. Our Lan Ha Bay cruise and island kayaking spends two days exploring its quieter corners.

Bai Tu Long Bay

Bai Tu Long Bay, north-east of Halong, is the wildest of the three. Fewer boats are allowed here, and the islands feel more remote, with traditional fishing villages such as Vung Vieng, where families still live in floating houses and row visitors around in small bamboo boats. It is the best choice if you want quiet and a sense of discovery.

See our Bai Tu Long Bay overnight cruise.

Day trip or overnight?

All three bays can be visited on a day trip from Hanoi, but it means around six hours on the road for four or five hours on the water. An overnight cruise is far better: you kayak in the late afternoon light, watch the sunset from the deck, and wake up to the islands in the morning mist before the day boats arrive. Two nights let you combine the bay with Cat Ba Island.

Choosing a boat

• Size: smaller boats with a handful of cabins feel more personal and can reach quieter spots.
• Route: ask exactly where the boat goes and where it anchors overnight. Routes in Lan Ha and Bai Tu Long are usually quieter.
• Activities: check whether kayaking, swimming and village visits are included.
• Timing: longer time on the water and earlier departures from the harbour make a big difference.

For more detail, read our guide to choosing a Halong Bay cruise.

Best time to visit the bays

Spring (March to May) and autumn (September to November) offer the best balance of calm seas, clear views and comfortable temperatures. Summer is hot and good for swimming, but tropical storms can cancel departures for a day or two. Winter is cool and often misty, which gives the islands a mysterious atmosphere but limits visibility and makes swimming too cold for most people.

Combining the bays with the rest of the north

The bays combine naturally with Hanoi and Ninh Binh. A popular route is Hanoi, then Ninh Binh for a day or two, then east to the coast for a night on a boat, before returning to Hanoi or flying south. For longer journeys, our Pu Luong to Bai Tu Long Bay trip links the mountains with the sea.

A typical overnight cruise

Most overnight cruises follow a similar rhythm. You leave Hanoi in the morning and reach the harbour around midday, where you board the boat and have lunch as it sails out among the islands. In the afternoon there is time for kayaking through lagoons and rock arches, a visit to a cave or a floating village, and a swim from a small beach when the weather allows.

As the sun sets, the boat anchors in a sheltered bay. Dinner is usually served on board, often with fresh seafood, and the evening is quiet: some boats offer squid fishing or a cooking demonstration, but many guests simply relax on deck under the stars.

Early risers are rewarded with the most magical moment of the trip: the islands appearing out of the morning mist, with only the sound of fishing boats on the water. After a light breakfast, many cruises include a short activity, such as kayaking or a visit to a pearl farm, before brunch and the return to the harbour around late morning. You are back in Hanoi in the afternoon.

Frequently Asked Questions

Is Lan Ha Bay better than Halong Bay?

For most travellers, yes: it has the same scenery with fewer boats, plus beaches and lagoons for kayaking. Halong is better if you want to see the most famous caves and viewpoints.

Is Bai Tu Long Bay worth it?

Yes, if you want peace and traditional fishing villages. It is the quietest of the three bays.

How many nights should I spend in Halong Bay?

One night is enough to enjoy the bay at sunset and sunrise. Two nights let you add Cat Ba Island or explore further.

Can I swim in Halong Bay?

Yes, in the warmer months, especially from small beaches and boats in Lan Ha Bay. The water is cool from December to March.