Weather in Ha Long + The Best Time to Visit

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What is the weather in Halong Bay in Quang Ninh province? The best time to visit Halong Bay.

☀️ Weather in Halong Bay
👍 When to go to Ha Long
🔎 Weather in Months
Questions + Answers
🎫 Excursion + Tickets
🎫 Book Tickets Online


What is the weather in Ha Long Bay, Vietnam?

Ha Long Bay is renowned for its unique landscape, featuring thousands of limestone islands and rock formations that create a surreal scenery. When it comes to weather, Ha Long Bay experiences a typical tropical climate, meaning warm temperatures almost year-round. Average temperatures range between 20 and 30 °C, providing a pleasant environment for visitors. In the winter months, temperatures may occasionally be a bit lower.

Although occasional brief rain showers can bring refreshment, most days offer sunny and clear weather. Due to this warm atmosphere and calm waters, Ha Long Bay is an ideal place for exploring on traditional wooden boats or embarking on adventurous trips among cliffs and caves. This tropical climate also influences the surrounding fauna and flora. Visitors can observe various bird species, including herons and seagulls, and the waters of Ha Long Bay are home to many marine life species, such as fish, crabs, and corals.


☀️ Dry Season in Ha Long Bay:

    • The Dry Season in Ha Long Bay represents a period with lower rainfall and favorable weather conditions for visitors. This period usually lasts from November to March, with temperatures ranging from a pleasant 15 to 25 °C. The Dry Season brings sunny and clear days, allowing for maximum enjoyment of Ha Long Bay’s beautiful natural scenery. During the dry season, you can expect calm seas, ideal for boat cruises and exploring the surrounding islands and rock formations. Additionally, temperatures are more comfortable, making it easier to enjoy beach activities and explore fascinating caves and bays that Ha Long Bay offers. This period also provides optimal conditions for witnessing the sunrise and sunset over this breathtaking landscape.

⛈️ Rainy Season in Ha Long Bay:

    • The Rainy Season in Ha Long Bay usually occurs from May to October and brings higher rainfall and occasional stormy conditions. During this period, higher temperatures can be expected, ranging from 25 to 35 °C, depending on the specific month. This season brings more intense green shades to the landscape but also higher humidity. The Rainy Season can bring regular short-term showers and storms, impacting the possibility of boat cruises or visiting some areas in Ha Long Bay. On the other hand, it also brings refreshment to the tropical environment and helps maintain the landscape rich and fertile. Some tourists prefer the rainy season for its lower number of visitors and the opportunity to experience Ha Long Bay in a more authentic setting.

🎫 Book tickets / car from Hanoi to Ha Long + Schedule:

(You can change your departure, arrival, e.g. Ha Long to Ninh Binh, Ha Long to Hanoi…)


What is the best time to visit Halong Bay in Vietnam?

    • The best time to visit Halong Bay in Vietnam is during the autumn months from September to November. During this time, the weather is mild with low rainfall and clear blue skies, making it perfect for outdoor activities such as cruising, kayaking, hiking. The temperatures range from 20°C to 28°C (68°F to 82°F), making it comfortable to explore Halong Bay and its surroundings. In addition to the pleasant weather, visiting Halong Bay during the autumn months also offers the opportunity to witness the stunning foliage colors that come with the changing of the season.
    • While the winter months from December to February can also offer clear blue skies and lower rainfall, the temperatures can drop significantly, making it uncomfortable for some travelers. The summer months from June to August are hot and humid, with frequent showers and thunderstorms, making it less desirable for outdoor activities. However, regardless of when you plan to visit, be sure to check the weather forecast and pack appropriate clothing to ensure a comfortable and enjoyable trip. If you want to relax on the beach and enjoy the scenery without too many crowds, the shoulder seasons of April-May and September-October may be good options.
      You can also check ➜ Current weather in Ha Long.

BOOK a TOUR / TICKETS in Ha Long

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Weather in Halong Bay throughout the year:

Month Weather Description
January in Ha Long In January, Halong Bay experiences cool and dry weather conditions. The average temperature ranges from 14°C to 20°C (57°F to 68°F), and it can get quite chilly at night. However, there are still occasional sunny days with temperatures reaching up to 25°C (77°F). The humidity is low during this time of the year, and rainfall is also low, with only about 30mm of precipitation expected over the month. The sea water temperature is also quite cool, around 20°C (68°F), which may be too cold for swimming for some. Overall, January is a good time to visit Halong Bay if you prefer cooler and drier weather, and want to avoid the hot and humid conditions of the summer months. However, it is still recommended to bring warm clothing for the cooler temperatures, and to check the weather forecast before planning any outdoor activities.
February in Ha Long February in Halong Bay still experiences cool weather, with the average temperature ranging from 15°C to 20°C (59°F to 68°F). However, the weather begins to get warmer towards the end of the month. The humidity remains low, and there is very little rainfall, with an average of only 20mm of precipitation expected over the month. The sea water temperature remains around 20°C (68°F), which may be too cold for swimming for most people. February is a good time to visit Halong Bay if you want to avoid the crowds and enjoy the cooler temperatures.
March in Ha Long March in Halong Bay marks the beginning of the warmer weather, with temperatures ranging from 18°C to 24°C (64°F to 75°F). The humidity and rainfall begin to increase, with an average of 50mm of precipitation expected over the month. The sea water temperature also starts to rise, reaching around 22°C (72°F) by the end of the month. March is a good time to visit Halong Bay if you want to experience the warmer weather but still want to avoid the peak tourist season.
April in Ha Long April in Halong Bay is the start of the peak tourist season, with temperatures ranging from 20°C to 28°C (68°F to 82°F). The weather is warm and humid, with occasional rain showers and thunderstorms, with an average of 90mm of precipitation expected over the month. The sea water temperature also continues to rise, reaching around 25°C (77°F) by the end of the month, making it ideal for swimming and water activities. April is a good time to visit Halong Bay if you want to experience the warmer weather and enjoy the water activities.
May in Ha Long May in Halong Bay is the hottest and most humid month, with temperatures ranging from 24°C to 32°C. The humidity is high, and there is a higher chance of rainfall, with an average of 150mm of precipitation expected over the month. The sea water temperature continues to rise, reaching around 28°C (82°F) by the end of the month, making it perfect for swimming and other water activities. May is a good time to visit Halong Bay if you don’t mind the heat and want to enjoy the water activities during the tourist season.
June in Ha Long June in Halong Bay is the start of the summer season, with temperatures ranging from 25°C to 33°C (77°F to 91°F). The weather is hot and humid, with frequent thunderstorms and occasional typhoons, with an average of 220mm of precipitation expected over the month. The sea water temperature is around 30°C (86°F), making it ideal for swimming and water activities. June is a good time to visit Halong Bay if you don’t mind the heat and humidity and want to experience the peak of the summer season.
July in Ha Long July in Halong Bay is the hottest and most humid month, with temperatures ranging from 27°C to 34°C (81°F to 93°F). The weather is similar to June, with frequent thunderstorms and occasional typhoons, with an average of 290mm of precipitation expected over the month. The sea water temperature remains around 30°C (86°F), making it perfect for swimming and water activities. July is a good time to visit Halong Bay if you are comfortable with the heat and humidity and want to experience the peak of the summer season.
August in Ha Long August in Halong Bay is still hot and humid, with temperatures ranging from 27°C to 33°C (81°F to 91°F). The weather is similar to July, with frequent thunderstorms and occasional typhoons, with an average of 310mm of precipitation expected over the month. The sea water temperature remains around 30°C (86°F), making it perfect for swimming and water activities. August is a good time to visit Halong Bay if you don’t mind the heat and humidity and want to experience the peak of the summer season.
September in Ha Long September in Halong Bay is the end of the summer season, with temperatures ranging from 25°C to 31°C (77°F to 88°F). The weather is still warm and humid, but the frequency of thunderstorms and typhoons decreases, with an average of 230mm of precipitation expected over the month. The sea water temperature remains around 28°C (82°F), making it ideal for swimming and water activities. September is a good time to visit Halong Bay if you want to avoid the peak tourist season and enjoy the warm weather before the onset of autumn.
October in Ha Long October in Halong Bay marks the beginning of autumn, with temperatures ranging from 21°C to 28°C (70°F to 82°F). The weather is comfortable with less humidity, and the chance of typhoons decreases. There is an average of 100mm of precipitation expected over the month. The sea water temperature starts to cool down, reaching around 25°C (77°F) by the end of the month, but still suitable for swimming and water activities. October is a good time to visit Halong Bay if you want to avoid the peak tourist season and enjoy the comfortable weather.
November in Ha Long November in Halong Bay is the start of the cool and dry season, with temperatures ranging from 16°C to 23°C (61°F to 73°F). The weather is dry with low humidity, and there is very little rainfall, with an average of only 30mm of precipitation expected over the month. The sea water temperature continues to cool down, reaching around 22°C (72°F) by the end of the month, which may be too cold for swimming for most people. November is a good time to visit Halong Bay if you want to avoid the crowds and enjoy the cool and dry weather.
December in Ha Long December in Halong Bay is the start of the winter season, with temperatures ranging from 13°C to 20°C (55°F to 68°F). The weather is cool and dry, with occasional light rain showers, with an average of 30mm of precipitation expected over the month. The sea water temperature continues to drop, reaching around 19°C (66°F) by the end of the month, which may be too cold for swimming for most people. December is a good time to visit Halong Bay if you want to avoid the crowds and enjoy the cool and dry weather, but be prepared for cooler temperatures and less water activities.


The Current weather in Halong Bay:

HẠ LONG WEATHER

Max, Min and Average Temperature in Ha Long:

Max Temperature in Ha Long: From May to August, Ha Long experiences its peak temperatures during the summer months. Daily highs soar between 30°C to 35°C (86°F to 95°F), creating a warm and inviting atmosphere. These balmy conditions make it the ideal time to explore Ha Long Bay’s iconic landscapes, embark on leisurely cruises, and indulge in water sports. However, be prepared for the influx of tourists, as this period coincides with the peak travel season.

Min Temperature in Ha Long: As winter descends upon Ha Long from December to February, temperatures take a dip, particularly during the nighttime hours. Expect lows ranging from 10°C to 15°C (50°F to 59°F), offering a refreshing respite from the summer heat. While cooler, this time of year unveils a quieter side of Ha Long, perfect for those seeking solitude and tranquility. It’s an opportune time to explore the region’s famed caves, such as Thien Cung and Sung Sot, or embark on off-the-beaten-path adventures to lesser-known islands.

Average Temperature in Ha Long: Throughout much of the year, Ha Long maintains a comfortable average temperature, making it an inviting destination for travelers year-round. Daytime temperatures typically hover between 20°C to 25°C (68°F to 77°F), offering pleasant conditions for outdoor activities and exploration. Whether you’re hiking to panoramic viewpoints, sampling delectable seafood cuisine, or immersing yourself in local culture, Ha Long’s temperate climate ensures an enjoyable experience for all.

Month Max Temp (°C) Min Temp (°C) Aver. Temp (°C)
Jan 19 15 17
Feb 19 15 17
March 21 17 19
April 25 21 23
May 29 24 27
June 31 26 28
July 32 26 28
Aug 31 25 27
Sep 30 24 27
Oct 27 22 24
Nov 24 19 22
Dec 21 17 19


Rainfall and Rainy Days in Ha Long:

Rainfall in Ha Long: Ha Long experiences a distinct wet season from May to September, characterized by frequent rainfall. During these months, the region receives a significant amount of precipitation, often ranging from 150mm to 300mm per month. July and August typically see the highest rainfall, with occasional heavy downpours. Despite the rain, Ha Long’s landscapes transform into lush greenery, adding to its natural charm.

Rainy Days in Ha Long: On average, Ha Long encounters approximately 15 to 20 rainy days per month during the wet season. These rainy days are marked by intermittent showers, thunderstorms, and overcast skies. While they may disrupt outdoor activities, they also offer a unique opportunity to witness Ha Long’s beauty in a different light. The rain creates a mystical atmosphere, shrouding the limestone karsts in mist and enhancing the allure of the bay.

Month Rainfall (mm) Rainy Days
January 38 10
February 50 12
March 81 14
April 150 15
May 237 17
June 305 17
July 305 17
August 305 17
Sep 290 16
October 180 13
Nov 65 10
Dec 42 9


Max and Average Wind Speed and Wind Gust in Ha Long:

Max Wind Speed in Ha Long: Throughout the year, Ha Long encounters varying maximum wind speeds, influenced by seasonal changes. Typically, the highest wind speeds occur during the transitional months of March and April, and also from October to December. Gusts can reach up to 20-25 kilometers per hour (12-15 miles per hour) during these periods, particularly around coastal areas. Visitors should be mindful of these conditions, especially when engaging in outdoor activities such as boat tours or hiking along the cliffs.

Average Wind Speed in Ha Long: Ha Long generally experiences moderate average wind speeds, creating a pleasant atmosphere for exploring its landscapes and attractions. On average, wind speeds range from 10-15 kilometers per hour (6-9 miles per hour) throughout much of the year. These gentle breezes provide a refreshing sensation, especially during the warmer months, enhancing the overall experience of visiting Ha Long Bay and its surrounding areas.

Wind Gusts in Ha Long: While average wind speeds remain relatively steady, occasional gusts can occur, particularly during periods of weather changes or passing storms. Gusts may reach up to 30-35 kilometers per hour (18-22 miles per hour) during these instances, adding a dynamic element to Ha Long’s environment. Travelers should remain cautious, especially when exploring elevated areas or engaging in water-based activities.

Month Max Wind Speed (km/h) Average Wind Speed (km/h) Wind Gust (km/h)
January 13.6 2.5 20.6
February 14.0 2.6 21.1
March 14.3 2.7 21.4
April 12.7 2.3 19.0
May 11.3 2.0 17.3
June 10.4 1.8 16.2
July 9.7 1.7 15.5
August 9.8 1.7 15.7
September 10.6 1.9 16.7
October 11.8 2.3 18.3
November 12.7 2.5 19.2
December 13.3 2.5 19.8


Cloud and Humidity in Ha Long:

Cloud Cover in Ha Long: Ha Long encounters varying degrees of cloud cover, influenced by seasonal changes. During the dry season, from October to April, skies are generally clear, offering uninterrupted views of the breathtaking scenery. This period provides optimal conditions for exploring Ha Long Bay’s iconic attractions and enjoying outdoor activities such as kayaking and hiking. However, during the wet season, from May to September, cloud cover becomes more prevalent, especially before or after rainfall. While this may obscure some views, it also adds a mystical ambiance to the landscape, creating dramatic scenes that are equally captivating. Travelers can still appreciate the beauty of Ha Long’s surroundings, albeit in a different light.

Humidity in Ha Long: Ha Long experiences a tropical climate, characterized by high humidity levels, particularly during the wet season. From May to September, humidity levels can soar, reaching upwards of 80% or more. While this may create muggy conditions, it also sustains the lush vegetation and vibrant ecosystems that thrive in Ha Long’s environment. Despite the humidity, travelers can still enjoy their time in Ha Long by staying hydrated, seeking shade during the hottest parts of the day, and taking advantage of cooling sea breezes. Embracing the tropical climate adds to the overall experience of immersing oneself in Ha Long’s natural beauty.

Month Cloud Cover (%) Average Humidity (%)
January 66 83
February 67 85
March 71 86
April 75 86
May 77 86
June 78 86
July 78 86
August 79 86
September 79 85
October 75 83
November 70 81
December 67 80


Sun Hours and Sun Days in Ha Long:

Sun Hours in Ha Long: Ha Long encounters fluctuating sun hours, influenced by seasonal changes. During the dry season, from October to April, the region typically enjoys longer periods of sunshine. Clear skies illuminate the stunning scenery, making it an ideal time for outdoor activities and exploration. However, during the wet season, from May to September, sun hours may be more limited due to increased cloud cover and occasional rainfall. Despite this, travelers can still expect moments of sunshine amidst the tropical showers.

Sunny Days in Ha Long: Throughout the year, Ha Long experiences a significant number of sunny days, particularly during the dry season. From October to April, visitors can anticipate a higher frequency of clear, sunny days, perfect for cruising through Ha Long Bay or lounging on the beaches. During the wet season, sunny days may be interspersed with cloudy or rainy periods. However, travelers can still enjoy outdoor adventures and cultural experiences amidst the changing weather conditions.

Month Sun Hours Sun Days
January 2.0 2
February 2.0 2
March 3.0 3
April 6.0 5
May 6.0 5
June 6.0 6
July 6.0 6
August 6.0 6
September 6.0 6
October 5.0 5
November 3.0 3
December 2.0 2


Visibility in Ha Long:

Ha Long’s visibility varies depending on several factors, including weather and environmental conditions. Generally, during the dry season from October to April, visibility tends to be clearer. This period offers expansive views of the limestone formations and pristine waters, ideal for cruising and exploring. However, during the wet season from May to September, visibility may be reduced due to increased humidity, fog, and occasional rainfall. Despite this, the misty atmosphere adds a mystical quality to the landscape, creating enchanting scenes that are equally captivating.

To maximize visibility during your visit to Ha Long:

Timing: Plan your outdoor activities during the dry season to take advantage of clearer visibility.
Early Mornings: Schedule activities for early mornings when visibility tends to be at its best, with less haze and fog.
Weather Awareness: Keep an eye on weather forecasts and be prepared for changes in visibility, especially during the wet season.
Elevated Views: Consider visiting elevated viewpoints or attractions to gain panoramic views of Ha Long’s landscapes, even on days with reduced visibility at ground level.

Month Average Visibility (km)
January 9.7
February 10.4
March 10.1
April 9.4
May 9.3
June 9.2
July 9.1
August 8.9
September 8.9
October 9.0
November 9.4
December 9.7


What is the sea temperature in Halong Bay:

The sea temperature in Halong Bay varies throughout the year depending on the season. In the winter months of December to February, the sea temperature can drop to around 15-18°C (59-64°F), while in the summer months of June to August, the sea temperature can rise to around 30-31°C (86-88°F). In the spring and fall months, the sea temperature is generally around 22-28°C (72-82°F). However, these are just general temperature ranges, and actual temperatures can vary depending on weather patterns and other factors.

Month Aver. Sea Temp. (°C) Aver. Sea Temp. (°F)
January 17-19°C 62-66°F
February 17-19°C 62-66°F
March 20-24°C 68-75°F
April 24-26°C 75-79°F
May 27-29°C 81-84°F
June 30-31°C 86-88°F
July 30-31°C 86-88°F
August 30-31°C 86-88°F
September 27-29°C 81-84°F
October 22-24°C 72-75°F
November 19-22°C 66-72°F
December 15-18°C 59-64°F

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Frequently Asked Questions – Weather in Ha Long:

1. When is the best time to visit Ha Long Bay?

    • The best time to visit Ha Long Bay is from March to May and from September to November. During these months, the weather is mild and pleasant, and there is little to no rainfall. The temperatures are also comfortable, ranging from around 20°C to 30°C. This is the perfect weather for taking a cruise and exploring the limestone formations and islands. However, it is important to note that this is also peak tourist season, so expect larger crowds and higher prices.

2. Is it safe to travel to Ha Long Bay during the rainy season?

    • While it is possible to travel to Ha Long Bay during the rainy season, it is not recommended as the weather can be unpredictable and the seas can be rough. You can read this article: How to go to Ha Long from Hanoi?

3. What is the average temperature in Ha Long Bay?

    • In the winter months from December to February, the average temperature is around 16-19°C (61-66°F), while in the summer months from June to August, the average temperature is around 28-30°C (82-86°F). During the transitional months of March, April, May, September, October, and November, the average temperature is around 20-25°C (68-77°F). However, it’s important to note that the temperature can vary depending on the day and time of year, and it can also feel hotter or cooler depending on the humidity level and other factors.

4. What should I wear when visiting Ha Long Bay?

    • When visiting Ha Long Bay in Vietnam, it’s recommended to wear comfortable and breathable clothing suitable for the tropical climate. This includes light and loose-fitting clothes, swimwear, a sun hat or cap, sunglasses, comfortable walking shoes, a rain jacket or poncho, and insect repellent. It’s also important to pack light and versatile clothing that can be layered, as the temperature and weather can vary.

5. Is it safe to visit Ha Long Bay during the typhoon season?

    • It is not recommended to visit Ha Long Bay during the typhoon season, which is from June to August. The weather can be very unpredictable, and the bay can be closed for safety reasons. It’s best to plan your trip outside of these months.

6. What is the humidity like in Ha Long Bay?

    • The humidity in Ha Long Bay can be quite high, especially during the summer months. The average humidity level in the area ranges from around 75% to 85%, but it can sometimes go higher during periods of heavy rain. The high humidity can make the weather feel hotter and stickier, and it can also lead to increased sweating and dehydration.

7. Does it rain a lot in Ha Long Bay?

    • Ha Long Bay receives an average of 2000 mm of rainfall per year, with the highest rainfall occurring from May to September. It’s important to pack appropriate rain gear if you plan to visit during these months.

8. Are there any weather-related activities to do in Ha Long Bay?

    • Yes, visitors can go kayaking, swimming, or take a cruise to explore the bay’s natural beauty regardless of the weather.

9. How long does the rainy season typically last in Ha Long Bay?

    • The rainy season in Ha Long Bay typically lasts from May to September, with the heaviest rainfall occurring in July and August. During this time, the area can experience frequent and heavy rainfall, as well as occasional typhoons and storms. While it’s still possible to visit Ha Long Bay during the rainy season, it’s important to be prepared for the wet conditions and potential disruptions to travel plans. Some outdoor activities may also be limited.

10. Is there a lot of fog in Ha Long Bay?

    • Yes, fog is a common occurrence in Ha Long Bay, especially during the cooler months from November to February. The fog is caused by the temperature difference between the cool air and the warmer water in the bay, and it can create a stunning and mysterious atmosphere in the area.

11. What is the water temperature like in Ha Long Bay?

    • The water temperature in Ha Long Bay can vary throughout the year. During the winter months from December to February, the water temperature can drop to around 15-18°C (59-64°F), while during the summer months from June to August, it can rise to around 28-30°C (82-86°F).

12. How often do tropical storms occur in Ha Long Bay?

    • Tropical storms, including typhoons and hurricanes, are relatively common in Ha Long Bay during the wet season, which runs from May to September. However, the frequency and severity of these storms can vary from year to year. It is important to stay informed of weather conditions during this time and follow any safety guidelines or evacuation orders issued by local authorities.

13. Can I go swimming in Ha Long Bay?

    • Yes, you can go swimming in Ha Long Bay, but it’s important to do so in designated areas and with caution. The water can be quite choppy and there are jellyfish in the bay during certain months.

14. Is it crowded in Ha Long Bay during peak season?

    • Yes, Ha Long Bay can be quite crowded during peak season, especially from June to August. If you prefer a more peaceful experience, it’s best to visit during the shoulder seasons.

15. What are the most popular and beautiful islands in Vietnam?

    • Vietnam has a lot of beautiful islands also accessible for tourists. One of the most popular is Phu Quoc in southern Vietnam, but you should carefully read this article about 10 Best Islands in Vietnam.

16. How to go to Halong Bay from Noi Bai Airport in Hanoi?

    • Travel from Noi Bai Airport to Halong Bay – the most convenient option is a private transfer via minivan / minibus or taxi / car, offering direct and comfortable transportation. Alternatively, travelers can opt for a combination of train and bus, with the train journey starting from Hanoi Railway Station to Hai Phong City, followed by a bus or ferry to Halong Bay. Choose the option that best suits your preferences, budget, and schedule.

BOOK your HOTEL in Ha Long

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