Halong Bay Weather in December 2025: Temperature and Travel Guide

Halong Bay in December: Weather Highlights and Temperature

December is quite good for traveling to Halong Bay. It is winter time, but not as freezing as you may think.

Halong Bay in December is peaceful and perfect for boat trips and sightseeing

Average Temperature (day & night)

December brings the start of winter to Halong Bay, with temperatures staying mild at 19°C (66°F) on average. The weather changes quite a bit during the day as mornings feel fresh and cool at 14°C (57°F), then warm up to 24°C (75°F) in the afternoon. 

This comfortable range makes December perfect for visitors who enjoy cooler weather instead of hot summer days. It is also nice for people coming from chilly countries, giving them a relaxing break without dealing with tropical heat.

December marks a mild winter in Halong Bay with temperatures ranging from 14°C to 24°C

Rainfall Statistics

December is one of the driest months in Halong Bay, with little rain over the period. You can expect only 22mm of rain, which is much lower than the hot, humid summer season. 

The month sees around 7 rainy days, but these usually are light showers rather than heavy storms. Most days feature clear skies with occasional drizzles that will not spoil your plans. The light rainfall rarely disrupts outdoor adventures, so December becomes a good choice to participate in various activities without weather concerns.

In December, Halong Bay receives only 22mm of rain across 7 days, mostly as light showers

Humidity Levels

One of the most notable features of December weather in Halong Bay is the significant drop in humidity. With an average humidity of about 66%, this is a stark contrast to the muggy 80 - 90% levels experienced in the summer. The lower humidity not only makes the air feel more likable but also creates a more pleasant environment for traveling. Explorers will find it easier to take in the sights of the natural beauty of the bay.

Air Quality & UV Index

December offers the gentlest solar exposure of the year, matching January's levels at index 4. However, sunscreen is still highly recommended for any plan that takes place outdoors.

As for the air, it remains breathable for comfortable exploration. Particulate matter readings (PM2.5: 17µg/m³, PM10: 47µg/m³) stay within reasonable ranges for Southeast Asia and should not impact most visitors during brief stays.

Typical Weather Patterns

Since it is wintertime, daylight hours in Halong Bay are shortened. Sunrise happens around 06:30, and sunset is by 17:30. So, planning your excursions early is key to making the most of each day.

Additionally, mornings often greet visitors with a veil of fog. When cold air touches warmer water, a light mist forms and floats over limestone islands. By late morning, it disappears and reveals beautiful scenery in full clarity. 

Although the sea cools to an average of 21°C, which may not be a good time for swimming, there is no dearth of ways to entertain. Kayaking, visiting fishing villages, or climbing rocks are all wonderful options for killing time here.

Though the 21°C sea may be too cool for swimming, kayaking and village visits offer plenty to enjoy.

Pros and Cons of Visiting Halong Bay in December

Pros

Low humidity levels, long sunshine hours, and warm Halong Bay December weather are suitable for exploring and taking part in outdoor activities. At the same time, low precipitation, dry atmosphere, and no storms make the bay calm, allowing you to confidently book cruises without worries about weather-related cancellations. 

Because December is the favorite time for Western tourists but not domestic tourists, you can avoid crowds of local people. You are also given a special opportunity to celebrate Christmas in a unique way at a UNESCO World Natural Heritage site.

Cons

Halong Bay temperature in December can drop to 15°C on some days, and there can be heavy fog and drizzle, requiring you to pack warm clothing such as jackets or sweaters. 

Furthermore, Christmas and New Year fall in December, which means there will be surcharges on accommodation, cruises, and tours.

December in Halong Bay is peaceful but 15°C chills and fog call for warm clothes

Best Things to Do in Halong Bay in December

Relaxing on a cruise

• Best for: Rejuvenators

For relaxation lovers, relaxing on board and admiring the stunning beauty of Halong Bay nature is a perfect choice. Even if it is foggy in the early morning or late afternoon, you can see a mystic bay which people can never have that view on sunny days.

Mysterious islands are hidden under thin fog when the boat is cruising slowly, passing towering limestone pillars and revealing breathtaking scenery. Moreover, Halong Bay Cruise is among the best choices for special occasions like Christmas & New Year's Day.

Relax on the cruise and take in the stunning views of Halong Bay

Kayaking

• Best for: Active travelers

If you are looking for some interesting outdoor activities to explore the Halong Bay landscapes thoroughly, kayaking through the hidden caves is a perfect choice for you.

After a few movements, you will get warm and get used to the water. The humidity level this month is quite low, so you can ease your mind due to the less possibility of rain affecting your activity.

To participate in this activity, consider booking our best Halong Bay cruise 1 night in December.

Explore the beauty of emerald waters by kayaking

Beach Sunbathing

• Best for: Chill-out retreaters

Halong Bay weather in December is suitable for chill-out retreaters to join a lot of chilling activities, especially beach relaxation.

Have an enjoyable beach holiday in Halong Bay

You can just relax on the pristine white sand and admire the unspoiled landscape if there is a low chance of rain, the weather is dry with lots of sunshine.

There are several cruises ideal for a wonderful beach vacation you can consider:

Visit Fishing Villages in Ha Long

• Best for: Travelers looking for an authentic cultural experience.

Exploring traditional fishing villages like Cua Van and Ba Hang offers an immersive look into the daily lives of local fishermen. You'll see floating houses, fishing boats, and even get a chance to interact with the villagers, which allows you to learn about their customs and traditions. In December, the cooler weather makes exploration through the villages more comfortable, allowing you to engage with local culture and interact with residents. 

Discover the daily local life of fishing villages

Try Rock Climbing

• Best for: Adventure seekers and outdoor enthusiasts

Halong Bay is famous for its stunning limestone cliffs, which make it an ideal spot for rock climbing. The best climbing areas are around Lan Ha Bay and Cat Ba Island, featuring a range of routes suitable for beginners and advanced climbers alike. The cooler temperatures in December enhance the climbing experience, allowing for more comfortable and enjoyable ascents amidst the breathtaking scenery.

Conquer the towering limestone cliffs in Halong Bay

Discover the Natural Caves  

• Best for: Nature lovers and explorers

Halong Bay is home to some incredible caves like Sung Sot Cave (Surprise Cave) and Thien Cung Cave, where various stunning stalactites and stalagmites will blow your mind. December offers clearer views inside the caves due to the dry conditions, making it the perfect time to capture breathtaking photos of these natural wonders.

Unveil the hidden beauty of natural caves

Go Swimming

• Best for: Relaxation lovers and water enthusiasts

While swimming is possible year-round, Halong Bay December is less ideal for these activities due to cooler water temperatures, averaging around 20°C. However, if you're eager to experience the bay’s waters, Cat Ba Island and Lan Ha Bay are great options. These areas feature beautiful beaches and calm waters, providing a picturesque setting for a swim.

Immersed in the emerald waters of Halong Bay

Outstanding Halong Events & Festivals in December

Chrismas & New Year's Eve

• Time: 25th December - 1st January

December, the last month of the year celebrates the world's biggest holidays: Christmas & New Year. If you are on a cruise during this time, there may be an interesting activity on board to celebrate these occasions. The cruise will be decorated with a lot of beautiful lights and ornaments, you can join the BBQ dinner, sing, dance, and drink.

Immerse in joyful activities on board during Christmas

Top 3 Iconic Dishes in Halong Bay During December

Here are the top 3 dishes to try in Halong during winter:

1. Chao Ha

One standout dish you should not miss is Chao Ha, acorn barnacle porridge. Acorn barnacles are small shellfish that cling tightly to rocks and ship hulls, living in one place for life. Locals carefully harvest these barnacles and simmer them in a fragrant broth made from fresh herbs, aromatic spices, and a mix of seafood.

The result is a velvety porridge with an ocean-fresh flavor that highlights the natural sweetness of barnacles. Each bowl is served hot, topped with a sprinkle of black pepper, fresh herbs, and crispy fried dough twists.

• Where to eat: Co Hang Restaurant, 42 Tran Hung Dao Street, Ha Long City
• Price: US $1.54

Chao Ha is a flavorful porridge of acorn barnacles simmered with herbs and seafood

2. Bun Be Be

When the air turns crisp in Ha Long, there is nothing more comforting than a steaming bowl of Bun Be Be, or mantis shrimp noodles. This local favorite is popular for breakfast and lunch, warming both body and soul in the chilly season.

The dish includes mantis shrimp, a seafood delicacy known not only for its distinctive look and powerful claws but also for its sweet, firm, and protein-rich meat. Vendors take great care in selecting plump shrimps of equal size, peeling them with skill to keep the flesh intact.

• Where to eat: Huy Chien Restaurant, Thuc Thoai, Hong Hai, Ha Long City
• Price: US $1.93 - US $2.70

Bun Be Be is a comforting favorite in Ha Long’s chilly weather

3. Banh Cuon Cha Muc

If you are in Ha Long in December, do not miss the chance to try Banh Cuon Cha Muc, a beloved local breakfast featuring silky steamed rice rolls filled with minced pork and mushrooms. What makes it special in Ha Long is the signature pairing with Cha Muc - crispy grilled squid cake. The contrast between the soft rolls and chewy squid creates a flavorful, comforting dish ideal for chilly mornings. Its light yet satisfying, and a true taste of local culinary tradition.

• Where to eat: Banh Cuon Ba Yen - 36 Doan Thi Diem, Bach Dang, Halong
• Price: From US $2

In Ha Long this December, try Banh Cuon Cha Muc - soft rice rolls paired with crispy squid cake

What to Wear in Halong Bay in December?

Casual clothes

Typically, you will travel from Hanoi to Halong Bay, so preparing comfortable clothing is essential. Opt for everyday wear like hoodies and casual jeans or pants:

• Waterproof jacket
• Sweater and cardigan
• Hoodies, sweatshirts
• Sneakers and flip-flops

Halong Bay Cruise Clothes

On the cruise, temperatures can drop even more, especially in the evening. In addition to your casual clothes, you should bring these items:

• A lightweight waterproof hooded jacket
• Comfortable indoor footwear like flip-flops
• Boots or sports shoes for exploring caves
• A swimsuit (preferably a one-piece) to stay warm while kayaking  
• A fancy outfit or dress for onboard parties

3-Day Halong Bay Itinerary for December: Cruise & Culture Highlights

December's cool weather and clear skies create the ideal backdrop for exploring limestone caves, soaking in hot springs, and indulging in local delicacies. Here's how to make the most of your winter getaway to Ha Long:

Day 1 - Arrive in Ha Long & Board the Cruise

Start your journey with a scenic morning transfer from Hanoi or Noi Bai Airport to Ha Long Bay. The cool December air and clear skies make the ride more pleasant, offering glimpses of the northern countryside. Upon arrival, check in to your cruise and enjoy a delicious lunch on board while the ship gently glides through the limestone karsts.

In the afternoon, visit eitherSung Sot (Surprise) Cave orThien Cung (Heavenly Palace) Cave. These dry caves are easy to explore in winter, with fewer crowds and more comfortable conditions. The combination of dramatic stalactites and tranquil bay views sets the tone for a relaxing evening.

As night falls, savor a romantic dinner under the stars on the cruise deck. Decembers calm waters and mild breezes also make it an ideal time to try squid fishing, a fun and peaceful activity before heading to your cabin for a restful night on board.

Sung Sot Cave is a peaceful winter stop, with fewer crowds and stunning stalactites

Day 2 - Morning Cruise & Back to Land (Overnight in Ha Long)

Wake up to the stillness of the bay and join a gentleTai Chi session on the sundeck, set against a glowing winter sunrise. Make sure to wear a light long-sleeved shirt to stay warm. After breakfast, explore a nearby floating fishing village or enjoy a short kayak ride - perfect for soaking in the serene scenery if the weather permits.

By midday, return to the harbor and transfer to your hotel in the Bai Chay area of Ha Long. After checking in and resting, head to Yoko Onsen Quang Hanh in the afternoon. The hot mineral springs and Japanese-style wellness facilities provide the ultimate relaxation in December's cool climate. It's a rejuvenating way to end a day of exploration.

Unwind at Yoko Onsen Quang Hanh, where hot springs and Japanese-style wellness soothe December’s chill

Day 3 - Leisure Time & Local Flavors Before Departure

Spend your final morning immersing yourself in local life. Visit the bustling Ha Long Market, where you can try authentic Cha Muc (grilled squid cake) and Banh Cuon Cha Muc - a specialty pairing unique to the area. These dishes are particularly satisfying on chilly mornings.

Then, unwind with a coffee at a seaside cafe, gazing out at the bay in the soft winter light. Alternatively, enjoy a warm drink at a rooftop bar for panoramic views and a peaceful atmosphere. After a light seafood lunch, begin your journey back to Hanoi, bringing with you memories of misty karsts, cozy meals, and cultural warmth.

Relax with coffee by the bay or sip a warm drink at a rooftop bar with serene winter views

Travel Advice for Halong Bay Trip in December Weather

Booking Tips

• Opt for cruise tours on Christmas and New Year's Eve to save money because the surcharge for hotel accommodation is often higher than a cruise.
• Contact your travel consultant to check carefully before booking due to surcharges for Christmas & New Year's Eve on some cruises.
• If you do not want to pay a surcharge, choose to stay in 3-star hotels or less.
• Book a cruise in advance to avoid disappointment. Though December is not the time when local people travel, the cruises can be fully booked by foreign tourists.

Packing Tips

These are the essential things to pack to visit Halong Bay in winter for the best experience:

• As it can be cold at night, you had better bring warm clothes like a puffer jacket or sweater.
• Prepare a light waterproof jacket in case the weather is foggy.
• Hats, caps, or sunscreen are still necessary for sunny days.  In addition, you may need a pair of athletic shoes for visiting the caves.
• The low humidity level may cause dryness to your skin, so you should bring a moisturizing cream.

FAQs

1. Is December an ideal month for visiting Halong Bay?

Yes, December is a great time to visit Halong Bay due to the dry and cool weather. However, temperatures can drop especially in the mornings and evenings, so it's advisable to dress warmly.

If you're more of a summer-lover person, read more of our guide on What to Expect in Halong Bay on Summer Days.

2. What clothing should I pack for a Halong Bay cruise in December?

You should pack warm, comfortable clothing that allows ease of movement. Don't forget to bring a light jacket, a scarf, and a wool hat to stay warm on colder days. Walking shoes or sneakers are perfect for outdoor activities.

3. Does December fall in the high or low tourist season?

December is generally part of the peak season for foreigners due to the cooler weather. Many travelers seek to escape the heat of summer, and the pleasant temperatures create ideal conditions for outdoor activities such as cruising, hiking, and exploring caves.

Additionally, the festive atmosphere during this month adds to the appeal, with holiday celebrations and events drawing even more tourists.

4. Is it possible to enjoy swimming in Halong Bay during December?

December can be quite chilly, so swimming may not be ideal for everyone. However, some adventurous travelers still take part in these activities despite the lower water temperatures.

5. Is it cold on cruises in December?

Yes, it can feel colder on a cruise due to the sea breeze, especially when compared to onshore activities.

• In the morning, temperatures typically range from 15°C to 18°C, often with fog.
• By the afternoon, the temperature may rise to around 20°C, providing a mild and comfortable climate.
• In the evening and at night, temperatures can drop from 13°C to 16°C. It’s not extremely cold, but you should definitely pack warm clothing just in case.

6. Is it too cold to swim in Halong Bay in December?

Yes, it is quite cold for swimming. Water temperature is 21°C (69°F) and air temperature is 14-24°C (57-75°F). Most people prefer to enjoy the views and activities on the boat instead of going into the water.

7. Are Halong Bay cruises cheaper in December?

Yes, cruise prices are often lower in December. This is because it is not the peak tourist season. You can find good deals and discounts on many cruise options.

8. Are Halong Bay hotels cheaper in December?

Yes, many hotels in Halong Bay offer cheaper rates in December. Since there are fewer tourists, it is a good time to find affordable accommodation, especially if you book early or look for special promotions.

9. Are there fewer tourists in Halong Bay in December?

Yes, fewer tourists visit in December due to cooler weather. This means less crowded boats, easier photo opportunities, and a more peaceful experience. You will have more space to enjoy the limestone cliffs and caves without big crowds.

December is a wonderful time to travel to Halong Bay. While the weather is cooler and a bit foggy, you will enjoy comfortable temperatures that are good for sightseeing. The calm seas make boat trips smooth and relaxing. Plus, you will avoid summer crowds and get better prices on tours and hotels.

Contact BestPrice Travel now if you want to explore the bay this December. Your dream Halong Bay vacation is just one click away!