If you plan your Vietnam tours in 2025, Halong Bay is a must-see destination. To have the best experiences in this UNESCO World Heritage Site, it’s essential to understand the diverse weather conditions that shape the bay’s beauty throughout the year. This travel blog gives you the characteristics of Halong Bay weather in different seasons to help you choose the best time to visit it.
Halong Bay weather throughout the year
Halong Bay weather in Spring
Spring in Halong Bay (March, April, May) is a transition period from the cooler winter months to the hotter summer months.
- Weather: milder, and the region experiences occasional rain showers.
- Temperature: Average temperatures range from 19°C to 24°C (66°F to 75°F).
- Pros: Spring is the best time to visit Halong Bay. In this region, Halong Bay invites you to explore its enchanting caves, kayak through tranquil waters, and embrace the landscape’s blossoming beauty and lush greenery.
- Cons: The weather can be unpredictable, with intermittent rain showers. Packing an umbrella or raincoat and preparing for the occasional wet weather is advisable.
Halong Bay weather in Summer
With the arrival of summer (June, July, August), Halong Bay comes alive in all its splendor.
- Weather: Summer is characterized by hot and humid weather. The skies are generally clear, with plenty of sunshine.
- Temperature: Average temperatures range from 28°C to 35°C (82°F to 95°F).
- Pros: Summer offers ideal conditions for water activities such as swimming, snorkeling, and cruising. The long daylight hours provide ample time for exploration and relaxation.
- Cons: The high temperatures and humidity levels can be challenging for some visitors. Additionally, occasional heavy rain showers and storms may occur during this season. Staying updated with weather forecasts and prepared for sudden changes is essential.
Note: In contrast to international travelers, the locals tend to set off their cruises around Halong Bay from June to August as a way to escape from the scorching weather of the summer months. As a result, the number of domestic excursionists reaches its peak. Therefore, if you want to enjoy your trip without so much noise, it’s advisable to have a perfect plan when taking a Halong cruise in the summer.
Halong Bay weather in Autumn
The weather in Autumn (September, October, November) has become more stable compared to the preceding months.
- Weather: Autumn brings pleasant weather to Halong Bay, with mild temperatures and lower humidity levels.
- Temperature: Average temperatures range from 24°C to 30°C (75°F to 86°F).
- Pros: Autumn offers comfortable temperatures for outdoor activities such as hiking, boating, and exploring the local fishing villages. The scenery is adorned with beautiful autumn colors, creating stunning landscapes.
- Cons: Although autumn generally experiences more stable weather, occasional drizzles and changing weather patterns can still occur. It’s advisable to pack a light rain jacket or umbrella.
Halong Bay weather in Winter
Winter (December to February) unveils a different side of Halong Bay, one of serene solitude and mystical charm.
- Weather: Winter brings cooler temperatures and drier conditions to Halong Bay. Mist and fog might envelop the bay, creating a mystical atmosphere.
- Temperature: Average temperatures range from 15°C to 20°C (59°F to 68°F).
- Pros: Winter offers a serene and peaceful ambiance, with fewer tourists than other seasons. It’s an excellent time to explore the limestone caves, enjoy fresh seafood, and experience the festive atmosphere during Lunar New Year celebrations.
- Cons: The cooler temperatures might limit swimming opportunities, and it’s advisable to pack layers of clothing to stay warm. Another disadvantage during this time is that services are expensive as January is among the months attracting the most foreign travelers.
Halong Bay weather by month
The weather in Halong Bay is influenced by a tropical monsoon climate, resulting in four distinct seasons. Let’s break down the conditions month by month:
| Halong Bay weather in month | Temperature | Overview | Best activities |
| Halong Bay in January | 14°C to 20°C (57°F to 68°F) | January is cool and dry, making it a comfortable time to visit. Fog is common, adding a mystical atmosphere to the bay. | This is ideal for sightseeing and cruising, but swimming might not be suitable due to the chilly water. |
| Halong Bay in February | 15°C to 21°C (59°F to 70°F) | The weather is similar to January, with slightly warmer temperatures and occasional light drizzles. | Perfect for boat tours and exploring caves. Remember to pack a light jacket. |
| Halong Bay in March | 18°C to 23°C (64°F to 73°F) | Spring starts in March, bringing mild weather and longer days. Some light rain may occur, but it won’t disrupt activities. | Excellent for hiking and kayaking. |
| Halong Bay in April | 20°C to 26°C (68°F to 79°F) | April offers warm and pleasant weather, with fewer rainy days. This is one of the best months to visit Halong Bay. | Ideal for all activities, including swimming, cruising, and photography. |
| Halong Bay in May | 24°C to 31°C (75°F to 88°F) | The summer begins in May, with warmer temperatures and occasional rain. | Good for beach outings and water sports. |
| Halong Bay in June | 26°C to 33°C (79°F to 91°F) | June is hot and humid, with frequent rain and thunderstorms. | Good for beach outings and water activities. |
| Halong Bay in July | 26°C to 34°C (79°F to 93°F) | July is the hottest month, with high humidity and a significant chance of tropical storms. | If weather permits, enjoy beach days and island excursions. Be prepared for sudden weather changes. |
| Halong Bay in August | 25°C to 33°C (77°F to 91°F) | Similar to July, August experiences heavy rainfall and potential typhoons. Crowds remain sparse, and prices are lower. | Indoor activities or visits to nearby cities like Hanoi may be better options. |
| Halong Bay in September | 24°C to 31°C (75°F to 88°F) | Rainfall decreases in late September, signaling the start of the autumn season. The weather is cooler and more stable. | Ideal for cruises and photography as the landscape looks lush and vibrant. |
| Halong Bay in October | 22°C to 28°C (72°F to 82°F) | October is one of the best months to visit Halong Bay. The weather is mild, with little rain and clear skies. | Perfect for all activities, especially cruising and exploring. |
| Halong Bay in November | 19°C to 26°C (66°F to 79°F) | November offers similar conditions to October, with slightly cooler temperatures. The bay is peaceful and picturesque. | Great for sightseeing, hiking, and photography. |
| Halong Bay in December | 15°C to 22°C (59°F to 72°F) | December marks the start of winter. The weather is cool and dry, with little rain and fewer tourists. | Ideal for relaxing cruises and enjoying the serene atmosphere. |
So, when is the best time to visit Halong Bay?
- Best time to visit: If you’re looking for the best weather and fewer crowds, consider visiting during the shoulder seasons from March to April and September to October. These months offer pleasant weather, affordable prices, and a balance between tourist traffic and service availability.
- For budget travelers: the best time to visit Halong Bay is between May and September. During this period, you can enjoy discounts of 10-20% compared to peak season rates. However, be mindful of the rainy season, especially in June, July, and August, when storms might disrupt plans.
Things to do in Halong Bay
Depending on the Halong Bay weather when you arrive, you can take part in one of these recommended activities:
- Take a cruise: On a cloudy day, just with an excursion on a ship, you can explore the beauty of the bay’s many islands. The good news is that you have a wide range of options about which islands to visit.
- Try a seaplane tour: Another way to discover the bay is to take a seaplane tour on a sunny day. A tour like this will give you a good overview of Halong from above.
- Go diving: If the weather is nice, this is a way to enjoy the world under the water of Halong Bay. It is also one of the most popular activities among travelers.
- Kayak: this activity offers you a unique and deeper connection to this UNESCO World Heritage site.
- Go night squid fishing: Don’t spend all your night just sleeping; use it to join this interesting activity, and you can likely have a barbecue with the fish you have caught.
- Go shopping: If you are interested in shopping, Cat Ba Island Market and Bai Chay Market are your answers.
- Taste local food: Since the site is located by the sea, seafood can be seen everywhere. So if you are a big fan of seafood, your thirst will surely be satisfied!
Tips on visiting Halong Bay
For Summer Travel (May to September):
- Bring essentials like sunglasses, sunscreen, insect repellent, swimsuits, hats, and waterproof sandals.
- Stay updated with your tour operator regarding weather conditions and potential cancellations.
For Winter Travel (October to April):
- Pack warm clothes, including sweatshirts and jackets, as mornings can be chilly.
Insider tips:
- There is no bad time to visit Halong Bay, as each season offers a unique charm.
- Always check the weather forecast and book in advance for the best experience.
- If bad weather disrupts your plans, consider visiting nearby attractions like Hanoi, which is just a 2-3 hour drive away.
- To avoid crowds completely, avoid Vietnamese public holidays such as Labor Day (May 1st) and book cruises or accommodations well in advance to secure the best deals.
Suggested Halong Bay Cruises
FAQs
What is the coldest month in Halong Bay?
The coldest month in Halong Bay is typically January, with average temperatures ranging from 14°C to 20°C (57°F to 68°F). While it’s too cold for swimming, the cool weather is perfect for sightseeing and enjoying the misty scenery.
What is the hottest month in Halong Bay?
July is the hottest month, with temperatures soaring between 26°C and 34°C (79°F to 93°F). Be prepared for high humidity and occasional thunderstorms.
What month has the least rain in Halong Bay?
December typically has the least rain, making it an excellent time for a dry and comfortable visit. The clear skies are ideal for cruises and photography.
What month has the most rainfall in Halong Bay?
August experiences the most rainfall, with frequent showers and potential typhoons. It’s important to monitor the weather and have flexible plans during this month.
Which month has the most daylight in Halong Bay?
June offers the longest daylight hours, making it great for exploring the bay. However, the hot and humid weather might require careful planning.
When you step foot on Halong Bay, you will be offered many other entertainment activities. With the information about Vietnam Halong Bay weather in different stages and major activities, we hope you will have a perfect plan for your trip.
Mo Nguyen – From Halong Junk Cruise
