Halong Bay Rainy Season: Should You Travel or NOT?

Consider visiting Halong Bay between July and September? Many travelers usually have second thoughts about traveling during the rainy season, which might spoil their experience. But is it really as bad as it sounds? From what the weather conditions are to how they affect, we’ll uncover whether this rainy season is worth the trip, and how to make the most of it.

About the Rainy Season in Halong Bay

When does the rainy season happen?

Halong Bay's rainy season typically occurs during the summer months, from July to September, as high temperatures are usually the primary reason for rainfall. During August, precipitation is expected to reach its peak, with the number of rainy days increasing dramatically compared to other months, up to 25.

What kind of weather should you expect?

During the rainy season, showers are most frequent in the afternoon to early evening, typically between 15:00 and 19:00. There may also be occasional rain at night, but mornings (6:00 to 11:00) are generally drier and sunnier, making them ideal for outdoor activities and sightseeing on deck.

Rain makes the air more humid and the bay mistier, creating lower visibility.

Most rainfall comes in short, heavy bursts, usually lasting 1 to 3 hours of downpour rather than long, all-day drizzles. That means you can still enjoy plenty of sunshine between the showers. After the rain, the skies often clear up beautifully, creating dramatic scenery that many travelers find breathtaking. 

In addition,  the temperature in July and August is pretty high, usually from 28 to 34°C (82 - 93°F), even up to 38ºC (100°F), plus the humidity level can be up to 86%. The air can feel heavy and muggy from noon on. You may feel oppressive dampness, especially before rain showers.

Any risks to know?

According to the National Centre for Hydro-Meteorological Forecasting, most storms in Halong Bay occur around this time of year, about 2 to 4 storms annually. Hot weather and high humidity also bring other tropical phenomena, such as cyclones, thunderstorms, and circular storms.

These severe weather conditions may sometimes cause cruise delays or cancellations. To stay safe, it’s best to keep in touch with your travel consultant and regularly check weather updates.

Heavy storms may affect cruise schedules, with occasional delays or cancellations for safety.

Is It Worth Visiting Halong Bay in the Rain Season?

The answer is YES. Despite common worries, Halong Bay’s monsoon season isn’t nearly as bad as many expect and is still worth booking a cruise tour.

On the bright side

Aside from occasional showers or storms, the overall weather during the rainy season is still hot, sunny, and humid, ideal for relaxing and enjoying water-based activities. In fact, the mix of misty skies, fresh rain, and dramatic light often transforms Halong Bay into an even more magical and cinematic landscape.

The sunny weather during the day still makes it a great time for water activities.

Plus, this is off-peak season, which means fewer tourists, more privacy, and a peaceful atmosphere where you can fully enjoy the scenery without the crowds. Many cruises also offer seasonal promotions and discounts, making this a more affordable time to enjoy a luxury experience.

On the downside

Sudden showers are common, which can interrupt outdoor activities, and the rain often reduces visibility. In some cases, severe weather conditions, such as strong winds or approaching storms, may lead to cruise delays, shortened itineraries, or even last-minute cancellations, as safety is always the top priority.

Who should consider going

Still, sightseeing can be surprisingly rewarding once the rain passes, and booking a quality Halong Bay cruise during this season may be ideal for these types of travelers below:

• Budget travelers: Many cruise promotions and lower prices.
• Romantic couples, off-season explorers: Low season, more peaceful and exclusive.
• Families with teenage kids: Cave visit, indoor cruise activities, and squid fishing season.
• Photographers: Capture rare moments of Halong Bay’s hidden charm, from misty rain to glowing golden hours.

Ready to embrace Halong Bay's rainy charm? Check out our top-rated cruises with flexible itineraries and wet-season perks.

July to September is still a good time to enjoy the most beautiful sunsets in Halong Bay.

>> Wondering when is the best time to visit Halong Bay? Here’s what you should know.

Monthly Weather Breakdown (July - September)

Each month in the rainy season has its own weather patterns that shape your travel experience. In this section, we’ll break down the key features of them, rainfall frequency, suitable activities, and essential travel notes, so you can make the most of your trip despite the wet season.

Particularly, in July and August, the rainfall is supposed to reach its peak, reaching up to 450mm. During this time, the number of rainy days can be counted up to 25. As previously mentioned, the temperature is high and the atmosphere is humid, which makes the rainy season a bit harsh to have a vacation. 

• If there is no storm, rain usually falls at certain times of the day, often in the afternoon or evening.
• If a storm occurs, rainfall becomes much more frequent and can last for 3 - 4 days. This may lead to flooding and unsafe conditions for boats. 

Consequently, itinerary changes and cruise cancellations are most likely during this period, with the highest risk usually in August and September. 

Source: Weather Spark

However, Halong Bay’s rainy season appears to be more pleasant with a considerable decrease in both rainfall and temperature at the end of September. The rainfall remains at average, approximately 250 mm, and the number of rain days decreases to 15, allowing tourist activities to be held normally. 

Source: Weather Spark

Also, the weather is expected to cool down as autumn gradually comes. The temperature is just around 27ºC; plus the humidity level is 75%. The sky of September is a bit brighter than that of the former. Sunshine can be seen everywhere, which makes it really interesting to take part in water activities in Halong Bay.

Overall, late September is considered a shoulder-season sweet spot for scenery & fewer crowds. It is ideal for travelers who want to avoid both peak heat and peak rain in the monsoon season.

Travel Tips During the Wet Season

Traveling to Halong Bay in the rainy season can still be rewarding if you come prepared. Here are some practical tips to help you stay comfortable and make the most of your trip.

• Pack lightweight and breathable outfits, a waterproof bag/ phone pouches, a small umbrella, and quick-dry essentials
• Bring motion sickness and cold/ flu medicines, as sudden wind or temperature changes can catch some travelers off guard
• Look for luxury cruises in Halong that offer flexible plans and many onboard activities to stay comfortable in any weather conditions
• Choose a larger ship to ensure safety and stability during sudden, strong winds or tornado-like conditions
• Book Halong cruises through reputable travel agencies with transparent refund or flexible reschedule policies
• If your cruise is canceled, consider staying overnight in Halong City or visiting nearby attractions like Ninh Binh and Mai Chau
•  Avoid scheduling tight connections right after your cruise

>> For detailed guidance, you can check our article What to Do If Your Halong Bay Cruise Is Cancelled.

If you are looking for a cruise in the rainy season, BestPrice Travel is always here to support you in choosing the most suitable cruise and provide full assistance from A to Z in any case of bad weather.

For more useful information about Halong Bay, please contact us through our website at bestpricetravel.com or our hotline at (+84) 904 699 428.

FAQs

1. Will it rain all day in Halong Bay during the rainy season?

Not usually. Most of the time, rain in Halong Bay comes in short bursts or afternoon showers. All-day downpours are rare, except when a typhoon or major storm passes through.

2. Are outdoor activities like kayaking safe during the rainy season? 

Yes, as long as the weather is stable. Light rain usually doesn’t stop activities, but tours will cancel kayaking or swimming if strong winds or storms make it unsafe.

3. Can I still take nice photos in Halong Bay when it rains? 

Yes! Rainy or misty days create a mystical vibe for unique photos, while most summer days are still sunny and perfect for capturing Halong Bay’s beauty.

4. Are Halong Bay cruises often canceled during the rainy season?

Only about 20% of cruises are canceled during the rainy season, usually when there’s a typhoon or severe weather warning. Heavy rain alone normally doesn’t affect the schedule unless it’s linked to a major storm.

5. Is travel insurance necessary for a rainy season cruise? 

Absolutely. It protects you from unexpected costs due to cancellations, delays, or health issues.

Huan Nguyen

(Image Source: Internet)