Halong Bay in September: Weather and best things to do 2025
The best months to visit Halong Bay Vietnam are from October to December but what if you only have time to travel in September? Are you worried about what the weather is like and what activities to try? Ha Long Bay Cheers Tours will provide all the necessary information to help you decide on your trip to Halong Bay in September.
1. The weather of Halong Bay in September
Halong Bay in September marks a welcome shift from the summer heat. You can look forward to gradually cooling temperatures and a slight dip in rainfall, creating a more comfortable and inviting atmosphere for discovering all the beauty the bay has to offer.
Key features of Halong Bay weather in September:
| Temperature | 23.3°C – 31°C (~ 73.9°F – 87.6°F) |
| Average sea temperature | 29.3°C (84.7°F) |
| Humidity | September marks the highest humidity in Halong Bay, with an average of 83% |
| Rainfall | Approximately 22.9 days of rainfall, accumulating up to 232 millimeters (9.13″) |
| Sunshine & UV index | Average of 8.1 hours of sunshine daily |
So, September in Halong Bay is still warm, but it’s definitely a step down from the really intense heat of summer, so it feels much more comfortable. While the temperature can occasionally peak at 31°C, you can generally expect an average of around 27°C. And the evenings are particularly pleasant, cooling down to about 25°C.
One of the nice things about September in Halong Bay is that the humidity eases off a bit from the summer, averaging around 83%. This makes a real difference when you’re out exploring, making outdoor activities much more enjoyable. And for swimmers, the sea temperature is still a delightful 29°C, offering that perfect balance – warm enough for a great swim, but not too hot like in the peak of summer.
The weather of Halong Bay in September
2. Is it worth going to Halong Bay in September?
Traveling to Halong Bay in September offers the benefits of less crowded, good cruise tour deals, and breathtaking scenery, but travelers should be mindful of the possibility of occasional light rain.
Visiting Halong Bay in September comes with some wonderful perks:
- The weather is just right for all sorts of outdoor fun like swimming, snorkeling, kayaking, and exploring those charming floating villages.
- The scenery is absolutely stunning in the fall – think clear blue skies and sparkling seawater making for truly breathtaking views.
- You’ll usually find fewer local tourists in September, which often means great deals, better service, and a much more peaceful atmosphere to enjoy it all.
Just a couple of things to keep in mind if you’re planning a September trip to Halong Bay. While the rainy season is easing off, there’s still a chance of occasional showers. Usually, though, these aren’t too frequent or heavy, so they shouldn’t disrupt your plans too much.
Also, while it’s not very common, there’s a small possibility of a cruise being canceled due to unexpected bad weather. However, by planning ahead and being a little flexible, you can usually work around any minor hiccups like this.
Overall, September is a good time to visit Halong Bay Vietnam. If you are still concerned about the weather, consider booking your trip from mid-September onward to make sure your trip will be perfect.
Is it worth going to Halong Bay in September?
3. Best experiences to try in Halong Bay in September
Explore exciting things to do at Halong Bay, where adventurous water sports, pristine landscapes and cultural encounters await worldwide travelers seeking unforgettable experiences. Here are some activities to try in Halong Bay in September.
3.1. Go kayaking and chill
Looking for a fantastic way to experience Halong Bay up close? Try kayaking! This incredible spot is recognized by National Geographic as one of the top 25 kayaking destinations worldwide. You’ll have the chance to gently paddle through the stunning emerald waters, navigate around those amazing limestone karsts, discover natural caves, and even observe the daily life of local fishermen.
And don’t worry if you’re new to kayaking, Halong Bay’s calm waters make it perfect for beginners of all ages. You can marvel at the beautiful limestone islands and serene waters regardless of your swimming skills. There are so many captivating places waiting to be explored, like the Vung Vieng and Ba Hang Fishing Villages, and the mystical Luon Cave and Trinh Nu Cave, each offering its own unique geological charm and beauty.
Go kayaking in Halong Bay in September
3.2. Marvel at the magnificent caves and grottos
When traveling to Halong Bay in September, tourists should not miss marveling at the magnificent grottos and caves.
Sung Sot Cave (Surprise Cave): Get ready to be amazed at Sung Sot Cave, it’s the biggest cave found in Halong Bay and is really important geologically and scientifically. The name actually comes from how many visitors are just wowed as they explore it, with one surprising sight after another.
Luon Cave: For a bit of adventure, try visiting Luon Cave when the tide is high. You’ll have the fun experience of ducking down in your boat to pass through the flooded entrance and discover a hidden lake inside. Plus, you can even take a rowboat here and often see playful monkeys around the lake.
Trong Cave (Drum Cave): Step inside Trong Cave, which covers a pretty large area of about 300 square meters. Right as you enter, you’ll be struck by the beautiful arch of the cave and the limestone formations hanging down. Listen closely, and you might hear the wind whistling through the cracks, echoing off the walls and creating a sound that’s said to be like a drum.
Hon Trong Mai (Fighting Cock Islets): Hon Trong Mai is made up of two small islets, about 12 meters tall, standing face-to-face like a pair of roosters. These islets seem to be leaning affectionately towards each other and have inspired countless artists over the years with their unique and charming.
Hon Cho Da (Stone Dog Islet): Right at the base of the mountain, close to the water, you’ll find Hon Cho Da. It’s about 8 meters high and looks just like a giant dog sitting there. Locals used to see it as a special symbol that protected the peace and safety of the fishermen living in the bay.
Marvel at the magnificent caves and grottos
3.3. Spend overnight on a Halong Bay cruise
With that lovely September weather in Ha Long Bay, booking an overnight cruise is the perfect way to really soak in all its enchanting beauty. These cruises usually take you to charming, rustic fishing villages dotted around the bay, let you explore famous caves, and offer all sorts of fun water activities.
Plus, you’ll be treated to some seriously luxurious accommodation on board, with spacious cabins, high-end suites, and more. And the perks don’t stop there – think amazing amenities like restaurants, relaxing lounges with those incredible panoramic views of Ha Long Bay, swimming pools, jacuzzis, poker rooms, bars, gyms,…
Spend overnight on a Halong Bay cruise
3.4. Chilling on a seaplane
For a truly exhilarating perspective of Halong Bay in September, consider a seaplane tour soaring over 300 meters above the water. This unique experience offers breathtaking aerial views of many iconic attractions, including Tuan Chau Island, Reu Island, Dinh Cave Island, Ba Hai Island, and more.
Each seaplane is designed for privacy and an exclusive feel, accommodating a maximum of 12 passengers along with two pilots. The pilots will provide live commentary on the tour and the stunning sights below. What’s more, you’re welcome to capture the incredible scenery through photography, filming, or even live streaming throughout your flight.
Chilling on a seaplane to see incredible views
3.5. Visit fishing villages
The serene weather in Halong Bay in September creates ideal conditions for visiting the picturesque fishing villages that dot its waters:
- Vung Vieng Fishing Village is particularly noteworthy, offering visitors a chance to experience its unique lifestyle firsthand by participating in fishing activities with the local community and enjoying the freshest seafood.
- Cua Van Floating Village, home to approximately 300 families, provides a tranquil retreat amidst the breathtaking scenery of Halong Bay. The mild September climate enhances the village’s appeal, allowing tourists to comfortably explore local artifacts, observe the daily routines of the residents, and immerse themselves in the stunning, postcard-worthy landscapes.
- Cong Dam Village is another excellent destination for an authentic fishing village tour, where visitors can engage in fishing excursions with the villagers, listen to their engaging stories, and appreciate the peaceful natural environment. All made more enjoyable by the pleasant September weather.
Visit picturesque fishing villages
3.6. Explore Titop Island
Situated roughly 12 kilometers from Tuan Chau Port lies Titop Island, a celebrated gem within Halong Bay. Its distinctive form, characterized by a steep incline on one side and a gradual slope on the other, presents a captivating scene amidst the bay’s natural splendor.
Despite its modest size, the island’s beach offers a tranquil and pristine environment, ensuring consistently clean and smooth sand, which is particularly inviting during the pleasant Halong Bay weather in September. Visitors to Titop Island can enjoy a range of exciting water activities, including kayaking, jet skiing, and beach volleyball.
A key highlight of any visit is the opportunity to ascend the mountain to the 100-meter-high observation point. From this vantage, you can take in the expansive and majestic panorama of the bay, creating a truly memorable experience amidst the serene beauty of Ha Long Bay.
Explore Titop Island in Halong Bay in September
3.7. Devour delectable local dishes
With that lovely weather in Halong Bay in September, it’s the perfect time to dive into some of the region’s amazing seafood. Get ready for incredibly fresh razor clams, scallops, shrimp, crabs, squid – all bursting with the taste of the bay.
If you’re a seafood lover, you’re in for a real treat, but that’s not all. Halong Bay also has some iconic local specialties you absolutely have to try, like squid cake with steamed rice rolls, delicious stir-fried snails, and refreshing yogurt with tapioca pearls. You can easily find these tasty dishes and treats at little eateries all along the sidewalks, just waiting to tempt your taste buds with their unique flavors and textures.
Devour delectable Halong local dishes
4. Packing tips for a trip to Halong Bay in September
Wondering what to pack for Halong Bay in September? Here are some handy tips based on the weather:
- Think lightweight summer clothes to stay cool during the day, and maybe a light cardigan or jacket for those slightly cooler evenings.
- Definitely bring your swimsuits so you can enjoy all the water activities.
- Even though the heat might not be scorching, it’s still important to pack sunscreen and sunglasses to protect yourself from the sun.
- Just in case of unexpected showers, a light raincoat and a waterproof bag for your electronics are a good idea.
- Don’t forget some mosquito repellent to keep those little buggers away, especially with the changing weather and the tail end of the monsoon season.
Packing tips for a trip to Halong Bay in September
5. More tips for traveling to Halong Bay in September
To really make the most of your September trip to Halong Bay, here are a few helpful pointers:
- Remember that September 2nd is Vietnam’s Independence Day, which means it’s a public holiday and a popular travel time. You might encounter more crowds, so it’s good to factor that into your plans.
- Keeping an eye on the weather forecast is always a smart move too, so you can plan your activities around any potential storms or heavy rain.
- When you’re choosing where to eat in Ha Long, look for restaurants with displayed prices or just ask before ordering. And if you’re dining out on a weekend, booking ahead or going during less busy hours can help you avoid the crowds.
More tips for traveling to Halong Bay in September
In conclusion, with pleasant weather of Halong Bay in September, visitors can fully immerse themselves in the emerald waters, majestic limestone karsts, and vibrant fishing villages that define this UNESCO World Heritage Site. Whether engaging in water activities, embarking on cultural excursions or savoring delicious seafood, Halong Bay offers endless opportunities for a memorable adventure during this time of the year.
6. FAQ
What is the Halong Bay Vietnam weather September?
Halong Bay Vietnam weather September offers a good balance of warm weather, comfortable humidity, and fewer crowds compared to the peak summer months, though you should still be prepared for occasional rain. You can expect milder temperatures, with an average around 27-28°C.
Is there any public holiday in Vietnam in September?
September 2nd commemorates President Ho Chi Minh's declaration of Vietnam's independence from French colonial rule in 1945. Therefore, if you are planning to visit Halong Bay in September, especially around the 1st to the 4th of September, be aware that it will likely be a peak travel period for locals, potentially leading to larger crowds and the need to book accommodations and tours well in advance.
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