CAT BA :2D1N Lan Ha bay-Ha Long bay with Plankton Excursion

Quiet water, glowing plankton, and fewer crowds await. This two-day trip from Cát Bà combines peaceful Lan Hạ Bay with limestone islands, hidden lagoons, village cycling, swimming, and a night on the water. I like the calm pace and the mix of outdoor fun with local life. I also like that the tour uses quieter parts of the bay rather than keeping you in a packed cruise line.

The main caution is the overnight setup. Although the program describes a floating homestay, one booking found the sleeping room was actually on a boat, down in the hull, with limited shower privacy. Weather can also change the route, as one departure could not reach Hạ Long Bay.

Key points at a glance

• Bioluminescent plankton after dark: Kayak at night or try squid fishing, with the chance to see the water sparkle around your paddle.
• A quiet southern route: Lan Hạ Bay offers limestone islands, calm lagoons, and a less crowded feel than the busiest parts of Hạ Long Bay.
• Two very different days: The first day mixes caves, swimming, a fishing village, and Việt Hải Village. The second focuses on lagoons, beaches, and kayaking.
• Strong food reviews: Seafood and Vietnamese dishes are served on the boat and at the overnight stay, with vegetarian choices available.
• Friendly English-speaking guides: Guides named B, Chilly, and Moka have been praised for their care, humor, cultural explanations, and quiet manner.
• Bring a swimsuit and patience: You will spend long stretches on a boat, and the accommodation may be simpler than the word homestay suggests.

Why this bay trip feels different

Many bay cruises are built around a large boat, a fixed route, and a crowded schedule. This one aims for something gentler. You travel in a small group through Lan Hạ Bay, where limestone islands rise from calm water and the pace leaves room to sit on deck, take pictures, or simply watch the islands pass.

The price is $110 per person. That includes hotel pickup and drop-off within Cát Bà Town, all meals, bottled water, kayaking, squid fishing, the plankton activity, and an English-speaking guide. You must add the entrance ticket, listed at $16, or 400,000 Vietnamese dong, plus drinks such as beer, wine, and soft drinks.

I consider that fair value if you want a packed two-day outing rather than only a boat ride. You get village visits, cycling, several kayaking sessions, swimming, meals, and an overnight stay. It is less appealing if you want a polished luxury cruise or a private cabin with hotel-like facilities.

The biggest attraction is the contrast between day and night. In daylight, you see cliffs, caves, fishing homes, and beaches. After sunset, the bay becomes quiet and dark enough for the bioluminescent plankton activity. That evening paddle is the unusual part of the trip, and it gives this excursion a reason to exist beyond standard sightseeing.

7:30 AM from Cát Bà Town to the fishing village

Your morning starts at the Cat Ba Smile Tours office at 204, 1/4 Street, or at your hotel in Cát Bà Town. Pickup begins at 7:30 AM, followed by a short transfer of about 1 kilometer to Bèo Harbour.

The first cruise passes through a floating fishing village described as one of Vietnam’s oldest. Your guide explains how fishing families live and work on the water. This is a useful beginning because it gives the bay a human side. You are not only looking at dramatic rock formations. You are also seeing a working community shaped by tides, boats, fish cages, and limited land.

The route continues through Lan Hạ Bay, passing limestone formations with names such as Turtle Islet, Toad Islet, and Candle Islet. You can expect plenty of time for photographs, but the exact view depends on weather and visibility. Mist can make the bay atmospheric, but it can also hide the distant cliffs.

Kayaking Bright Cave, Dark Cave, and Bat Cave

From roughly 7:45 AM to 11:30 AM, the boat moves toward the boundary between Lan Hạ Bay and Hạ Long Bay. The main active section is about one and a half hours of kayaking through Bright Cave, Dark Cave, and Bat Cave.

These cave names give you a good idea of the variety. Some passages lead toward enclosed lagoons, where the water is quieter and the surrounding rock walls feel close. Others may be darker and more enclosed. You are using a kayak rather than simply looking at the caves from a large boat, so you get closer to the water and set your own pace within the group.

You should be comfortable getting into and out of a kayak and paddling for an extended period. The activity is one of the central reasons to choose this excursion, not a small extra added at the end. Bring sunscreen, a swimsuit, and a phone that you can protect from splashes if you want photographs.

The bay border is also worth treating with a little flexibility. A guide can plan the route, but weather and water conditions may prevent access to part of Hạ Long Bay. One departure reached Lan Hạ Bay but could not continue into Hạ Long Bay because of the weather. If seeing both bays is essential to you, ask about current conditions before departure.

Swimming at Cam Lagoon before lunch

The boat then heads to Cam Lagoon, a private swimming area in the middle of Hạ Long Bay. The scheduled swim lasts about 30 minutes, and you may jump from the deck if conditions allow.

This stop works well after kayaking. You can cool off in the water, rinse away the sweat, or relax on the boat while others swim. The area is described as less touristy, which should make it feel calmer than a busy public beach, though the number of boats can still depend on the day and weather.

There is no need to force yourself into the water. If you do not swim, the deck gives you a place to sunbathe and take pictures. If you do swim, pack a towel and keep your dry clothing easy to reach. The supplied information specifically recommends swimwear and sunscreen, and both are genuinely useful here.

Lunch follows from noon to 1:00 PM. Expect Vietnamese dishes, seafood, and vegetarian options. Food is one of the strongest parts of this trip. The meals are not just fuel between activities, but part of the local setting, especially when you eat on the boat with the bay around you.

Cycling through Việt Hải Village

After lunch, the boat takes you by another route toward Việt Hải Harbour. Between about 2:30 PM and 4:30 PM, you cycle across rice fields to Việt Hải Village.

This section changes the mood completely. After several hours surrounded by water and limestone cliffs, you reach a village where you can walk around, meet local people, and learn about daily life and culture. The rice fields make the short cycle more than simple transport. You get a view of Cát Bà away from the coast and cruise boats.

You may also be able to help with seasonal farm work. The word seasonal matters here. Farming is not guaranteed on every departure, so treat it as a possible extra rather than a promised activity.

The village also offers a fish massage. It is a small, unusual experience, and some people will find it amusing. Others may prefer to skip it. You do not need to treat every listed activity as compulsory. The real value of Việt Hải is the chance to slow down and see a different side of the island.

An overnight stay with a practical warning

Dinner is served between 6:00 PM and 10:00 PM, with traditional Vietnamese food prepared at the floating accommodation. Vegetarian food is available, which makes the trip easier for mixed groups.

The overnight arrangement needs clarification before you pay. The program calls it a floating homestay, but the actual sleeping setup may be a boat room rather than a room in a floating village. One booking found the room located in the lower part of the boat and was disappointed by the lack of a private shower. Another couple offered their bathroom so the person could wash properly.

This does not mean every departure has the same arrangement, but you should ask Cat Ba Smile Tours exactly where you will sleep, whether the room has a private bathroom, and what kind of bedding is provided. If you are happy with basic accommodation and care more about the location than comfort, the overnight can be memorable. If you need a proper hotel bathroom and plenty of space, this may not be the right choice.

The plankton paddle after dark

The evening activity is the trip’s signature moment. You can try squid fishing or kayak to look for bioluminescent plankton.

The plankton is easiest to appreciate when the water is dark and calm. As your paddle moves, tiny points of light may flicker around it. This is not a guaranteed light show, and the effect depends on natural conditions, but the chance to see glowing water in a quiet bay is rare enough to make the activity special.

You should not expect a long expedition. The appeal is the silence, the darkness, and the surprise of seeing small flashes around your kayak. One guide, Moka, was especially appreciated for being discreet and gentle during this part of the evening. Guides B and Chilly also received praise for their enthusiasm, explanations, and friendly care throughout the trip.

If plankton does not appear clearly, squid fishing gives you another way to spend the evening. You can also sit outside, enjoy the cool air, and watch the bay settle for the night. The schedule leaves room for a relaxed end to the day rather than pushing you straight from one activity into another.

Ho Ba Hầm, Dau Bê Island, and the second day

Breakfast is served at 8:00 AM. You can watch the sunrise, breathe the fresh air, and take a slower start before the second day’s activities begin.

At 9:00 AM, the route heads toward Ho Ba Hầm, a group of three hidden lagoons. At about 11:00 AM, you visit Dau Bê Island and have time to relax on a deserted beach. You can kayak into the lagoons, which gives you a close look at the enclosed water and rock walls.

This is a quieter way to experience the bay. There are no city streets, shops, or large sightseeing attractions competing for your attention. You get beaches, limestone islands, and the sound of paddles in the water.

The second day can be affected by conditions and scheduling. One booking found that only kayaking was offered, without the planned visit to Dau Bê Island or time on the beach. That is an important point if these stops are your main reason for booking. Ask the operator on the first evening whether the route is expected to run as planned.

Lunch is prepared in a local cooking style at noon. Afterward, the boat returns toward Lan Hạ Bay for more kayaking, swimming at private beaches, sunbathing, and time around the limestone islands.

The boat returns to Cát Bà Town at about 3:00 PM, with the trip finishing around 3:30 PM at the office. You can book onward bus tickets to Hà Nội, Ninh Bình, Hà Giang, or Sa Pa for around 4:00 PM, but I would still avoid booking an important connection with no backup time.

Food, guides, and the small-group feel

Food is one of the clearest strengths. Meals include Vietnamese dishes, seafood, and vegetarian choices, and the food served aboard was praised as excellent. That matters on a two-day trip because you are not stopping at restaurants between every activity.

The guides add much of the character. B has been praised for explaining the bays, Vietnamese history, local life, and Cát Bà National Park while also taking care of practical needs. Chilly brings energy and humor, while Moka is noted for a more sensitive and quiet style.

This range is useful to know. The guide may be lively and talkative, or calm and discreet, depending on who leads your group. In either case, the English-speaking guide is not only there to direct the kayak. Good explanations help you understand why the fishing village exists, how local families live, and what you are seeing beyond the photo opportunity.

The small-group format is another strong point. You are less likely to feel packed into a large party with loud music. The boat gives you space to sit on deck, talk with the group, or enjoy the view in silence. If you want nightlife, parties, or a luxury cruise atmosphere, this is probably too quiet.

Who should book this two-day excursion?

I would recommend it to you if you want active days, simple accommodation, and a close look at Lan Hạ Bay. It suits couples, friends, and independent-minded people who enjoy kayaking, swimming, cycling, and trying something unusual after dark.

It also suits vegetarians and anyone who values good food on a group trip. The combination of local meals, village contact, and time on the water gives you more variety than a standard one-day bay cruise.

You should think twice if you need a guaranteed Hạ Long Bay route, a private modern bathroom, or a carefully fixed beach schedule. Weather can change the itinerary, and the sleeping arrangements may be more basic than the promotional wording suggests.

Bring swimwear, sunscreen, and a way to protect your phone. Also provide your phone number and email when booking so the operator can contact you. The activity is not suitable for people over 95 years old. You can reserve and pay later, and cancellation is allowed up to 24 hours before departure for a full refund.

Should you book Cat Ba’s Lan Hạ Bay plankton trip?

Book it if your ideal bay trip includes quiet water, active outings, local food, and a little uncertainty. The kayaking through caves, Việt Hải Village, excellent meals, and possible plankton sighting make the $110 price reasonable, especially with transport and activities included.

Before booking, confirm the overnight room, bathroom arrangements, entrance fee, and weather plan for Hạ Long Bay. If you accept basic accommodation and flexible routing, this is a memorable way to see the calmer side of northern Vietnam. If you want comfort above all else, choose a more conventional cruise.

FAQ

Where does the tour start and finish?

It starts at the Cat Ba Smile Tours office at 204, 1/4 Street, Cát Bà Town, or with pickup from a hotel in Cát Bà Town. It finishes back at the same meeting point at about 3:30 PM on the second day.

What is included in the $110 price?

The price includes hotel pickup and drop-off in Cát Bà Town, all meals, bottled water, kayaking, squid fishing, the chance to watch bioluminescent plankton, and an English-speaking guide.

Is the entrance ticket included?

No. The entrance ticket costs $16, or 400,000 Vietnamese dong. Drinks such as wine, beer, and soft drinks are also not included.

Can I see bioluminescent plankton?

The tour includes kayaking to look for bioluminescent plankton at night. The activity depends on natural conditions, so seeing a strong glow cannot be guaranteed.

What should I bring?

Bring swimwear and sunscreen. You should also provide your phone number and email when booking so the operator can contact you.

Can the itinerary change because of weather?

Yes. Weather can prevent the boat from reaching Hạ Long Bay or affect planned stops such as Dau Bê Island and the beach. One departure reached Lan Hạ Bay but could not continue to Hạ Long Bay because of conditions.