Best Time to Visit Halong Bay: Weather and Tips

Every year, as October approaches, Halong Bay welcomes a large number of tourists who come to enjoy its stunning scenery and tranquil atmosphere. Why is this time of year so popular? 

These visitors have discovered that autumn is the best time to explore Halong Bay when the weather is ideal for cruising and outdoor activities. If you're still unsure about when to plan your trip, keep reading this Halong Bay travel guide! Halong Bay Cruise Trip is here to guide you on when to visit Halong Bay.


1. Halong Bay Weather Overview

Halong Bay Complex

The weather in Halong Bay closely mirrors the northern regions of Vietnam, which has 4 distinct seasons including spring, summer, autumn, and winter. Each season has its pros and cons, depending on what you like to do and the kind of weather you enjoy. Here's a quick rundown to help you decide when to visit:

  • Spring (February - March): It's mild and pleasant, with beautiful flowers in bloom.
  • Summer (April - August): Warm and sunny, but it can get pretty crowded with local tourists and there's a chance of tropical storms.
  • Autumn (September - October): This is the best time to visit Halong Bay because the weather is just perfect for dry and cool!
  • Winter (November - January): It's cool and misty, which creates a peaceful and calming atmosphere. However, it's not the best time for swimming.

Knowing about these seasonal changes will help you plan an amazing trip to Halong Bay that's just right for you.

2. Halong Bay Weather by Month

When is the best time to go to Halong Bay? To give you a clearer idea of what to expect, here’s a detailed breakdown of Halong Bay’s weather by month, along with the pros and cons of visiting during each period.

2.1. Spring in Halong Bay (Feb - March)

Flowers blooming in Halong Bay

Spring is a suitable time to plan a trip to Halong Bay, especially in March when the Halong Bay weather starts getting milder. The temperatures range from 18°C to 25°C, so it’s just perfect for outdoor adventures like hiking and Halong Bay cruising.

In February, you might still feel the chill of winter, but it adds a mystical touch with occasional mist covering the bay. It's almost dreamlike, especially during early morning cruises. As March rolls in, the weather becomes even more pleasant, and you'll begin to see more greenery and blooming flowers all around. It's a great time for capturing stunning photos!

Tips for visiting in spring:

  • You can take advantage of the cooler weather and fewer tourists for a more relaxed experience at this springtime.
  • This is an ideal time for trekking on nearby islands like Cat Ba and exploring the caves and grottoes of Halong Bay without large crowds.
  • While the sea might still be a little cold for swimming, kayaking and cruising are perfect spring activities.

2.2. Summer in Halong Bay (April - August)

Summer in Halong Bay is a great time to swimming

Summer is the busiest season in Halong Bay, especially from May to August when domestic tourists flock to the area for the summer holiday. Temperatures during summer can range from 28°C to 38°C with hot and humid feelings. This season is perfect for enjoying water-based activities like swimming and kayaking around Halong Bay limestones.

However, it’s important to note that summer in Halong Bay can appear with the rainy season, particularly in July and August. Tropical storms are common during these months, which can lead to cruise cancellations or delays, so be sure to keep an eye on the weather forecast if you plan to visit in the summer.

Tips for visiting in summer:

  • April to June is ideal for those who want hot weather for a Vietnam beach getaway and clear skies before the rains become too frequent.
  • Be sure to book your cruise in advance as this is the high season for domestic tourists, especially during holidays and weekends.
  • If visiting in July or August, check the weather forecast closely and have backup plans in case your cruise is postponed due to storms.

2.3. Autumn in Halong Bay (September - October)

Autumn is a favorable time to cruising Halong Bay

Autumn is widely regarded as the best time to visit Halong Bay. The temperatures drop to a comfortable range of 20°C to 28°C, and the skies are clear which is the best time of year to visit Halong Bay for sightseeing, photography, and outdoor activities.

This season is particularly popular among international tourists, and many find that the natural beauty of Halong Bay is at its peak during autumn. The iconic limestone karsts look even more stunning under the golden autumn light, while the calm waters are ideal for a smooth Halong Bay overnight cruise.

Tips for visiting in autumn:

  • October and November are considered the perfect months for cruising, kayaking, and exploring the caves and islands of Halong Bay.
  • The weather is also great for outdoor activities like rock climbing on Cat Ba Island or exploring the nearby fishing villages.

2.4. Winter in Halong Bay (December - January)

Halong Bay in winter is more cloudy

Winter in Halong Bay brings cooler temperatures, ranging from 10°C to 15°C. It's not the best time for water activities, but it features a peaceful and quiet atmosphere with fewer tourists and lower prices. The bay often gets covered in mist, creating a mysterious and romantic atmosphere that makes cruising through Halong’s limestone islands feel like stepping into a fairytale.

Even though the cool weather may not be great for swimming, the calm waters and tranquil scenery are perfect for cruising. Many people find the misty atmosphere to be a unique and enchanting experience such as Christmas and New Year celebrations.

Tips for visiting in winter:

  • Winter is a great time for anyone looking for a more serene and peaceful experience in Halong Bay.
  • Pack warm clothes, especially if you're planning an overnight cruise, as the evenings can be chilly.
  • Don't forget to bring your camera to capture the stunning landscapes shrouded in mist.

3. Best Time to Visit Halong Bay for Festivals

When planning the perfect time to visit Halong Bay, most travelers immediately think about the weather, but what many don’t realize is that festivals can play just as important a role in shaping a memorable trip. Let’s look at some of the best festivals in Halong Bay that add a cultural twist to your Halong Bay things to do!

3.1. Carnaval Ha Long (April or May)

Carnaval Ha Long festival in Halong Bay

The Carnaval Ha Long festival in Halong Bay is a wonderful celebration of the bay's beauty and local culture. It's typically held at the end of April or early May, and it's an event not to be missed.

The event is marked by colorful parades, traditional dances, live music, and stunning firework displays. Both locals and tourists gather to witness this large-scale spectacle, which brings the streets alive with vibrant energy.

Note: The exact date of Carnaval Ha Long changes each year, often occurring with Vietnam’s Liberation Day on April 30th.

Note: The exact date of Carnaval Ha Long changes each year, often occurring with Vietnam’s Liberation Day on April 30th.

3.2. Lunar New Year (Tet Holiday) – January or February

Tourists can celebrate Lunar New Year in Halong Bay

Vietnam’s biggest and most important festival, Tet Nguyen Dan (Lunar New Year), falls in late January or February, depending on the lunar calendar. Halong Bay, like the rest of Vietnam, is steeped in festive spirit during this time. 

The streets are adorned with red decorations, locals visit temples, and families come together for feasts. If you visit during Tet, expect to see dragon dances, traditional performances, and many families enjoying cruises in the bay. Keep in mind, however, that some tourist services may be limited during the holiday with higher surcharges.

Note: Tet falls on different dates each year based on the lunar calendar.

  • Tet 2025: January 29th
  • Tet 2026: February 17th

3.3. Yen Tu Festival (January - March)

Yen Tu Festival

The Yen Tu Festival is one of the most important religious events in northern Vietnam and takes place near Halong Bay, in Uong Bi City. The festival occurs from the 10th day of the lunar new year (around February) and lasts until March. 

Pilgrims from all over Vietnam flock to Yen Tu Mountain, which is considered the cradle of Vietnamese Buddhism. Climbing to the top of the mountain is a spiritual journey for many, and the festival period is a great time to experience the serene beauty of this sacred site.

Note: The festival runs for nearly 3 months, but the busiest days are usually around the 10th day of the lunar month.

  • 2025: February 8th – March (expected)
  • 2026: January 28th – March (expected)

3.4. Mid-Autumn Festival (September)

The Mid-Autumn Festival (Full Moon Festival), or Tet Trung Thu, is celebrated in lunar mid-August when the moon is at its fullest. This festival is especially enjoyed by children, with traditional lion dances, lantern processions, and sweet mooncakes as the main attractions. 

If you’re visiting Halong Bay during this time, you can enjoy the local festivities and join in the fun of this family-oriented celebration.

Note: The Full Moon Festival date changes according to the lunar calendar.

  • Mid-Autumn Day 2025: October 6th
  • Mid-Autumn Day 2026: September 25th

4. FAQs about the Best Time to Visit Halong Bay

If you’re planning a trip to Halong Bay, timing is crucial for getting the most out of your experience. Here are some frequently asked questions that will help guide you on when to visit, considering the weather, activities as well as festivals.

Halong Bay cruise experience

Q1: When is the best time to visit Halong Bay Vietnam?

September to November is the best time of year for a Halong Bay visit.

Q2: When is the best time for a Halong Bay cruise?

Autumn and spring are generally considered the Halong Bay cruise best time to visit, as the weather is mild, and the seas are calm for smoother sailing and better sightseeing.

Q3: What is the best time to visit Hanoi and Halong Bay together?

The best time to visit both Hanoi and Halong Bay is during the autumn months of September to October and the spring months of February to March. Both regions experience mild temperatures and lower rainfall during these periods.

Q4: Is it worth visiting Halong Bay in winter?

Yes, visiting Halong Bay in winter (December to January) can be a wonderful experience, especially if you enjoy a more peaceful atmosphere. It’s a quieter time, with fewer tourists, and although it’s not ideal for swimming, you can enjoy luxury Halong Bay cruises and the tranquil beauty of the landscape.

Q5: Are Halong Bay cruises canceled often due to bad weather?

Yes, during the summer months of July and August, cruise cancellations can happen due to tropical storms and high winds. These cancellations are for safety reasons, and while they may cause inconvenience, the cruise operators usually offer refunds or rebooking options. 

Whether you're drawn to Halong Bay's sunny summer vibe or its misty winter atmosphere, choosing the right time to visit is key to having a memorable experience. 

Now that you know the best time to visit Halong Bay, it's time to start planning your adventure! Reach out to Halong Bay Cruise Trip for personalized itineraries and expert advice to make the most of your trip with hot deals.

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