Climate and region of Halong Bay
Halong Bay, located in northern Vietnam, follows a distinct seasonal climate pattern similar to Hanoi but without the altitude effects of places like Sapa. The region has two main seasons: a dry season from November to April, with cooler and drier conditions, and a rainy season from May to October, characterized by high humidity, frequent showers, and occasional storms. Unlike central and southern Vietnam, where temperatures remain consistently warm, Halong Bay experiences significant seasonal shifts, including a cool winter and a hot, humid summer. Since July falls in the heart of the rainy season, understanding these broader climate trends helps put the weather into perspective.
Weather in Halong Bay in July
July is one of the hottest months in Halong Bay, with temperatures ranging from 26°C to 34°C (79°F – 93°F). Humidity remains high, often exceeding 85%, making the air feel even warmer. Rainfall is significant, averaging 270 mm (10.6 inches) for the month, with frequent short but heavy showers, usually in the afternoon or evening. This is also the peak of the summer storm season, meaning occasional tropical storms or typhoons can impact cruise schedules. While there are still many sunny hours, cloudy days are common, and the mix of heat, humidity, and rain defines July’s weather.
The rainy season is now in full swing, making July one of the wettest months of the year. Rain rarely lasts all day, but sudden downpours and occasional storms can lead to temporary disruptions. Despite this, Halong Bay still offers dramatic scenery, especially when mist lingers over the limestone formations after a summer rain. If you are looking for different weather conditions, read our guide to best time to visit Halong Bay.
Halong Bay cruise in July, is it worth it?
A cruise in Halong Bay in July can be a good choice, but travelers should be prepared for unpredictable weather. July falls in the peak of the rainy season, meaning hot temperatures, high humidity, and frequent rain showers. While there are still plenty of sunny hours, heavy downpours and occasional storms can affect cruise schedules. This is also the time when tropical storms or typhoons are most likely, which can cause cancellations or delays. However, since July is not a peak travel month, cruise prices are often lower, and fewer tourists mean a quieter experience.
Pros of a July cruise
- Lower prices, as it is not a high-season month.
- Fewer tourists, making cruises feel more private.
- Still many dry hours, as rain often comes in short bursts.
- Warm temperatures, ideal for swimming and water activities.
Cons of a July cruise
- High chance of rain, with frequent downpours.
- Humidity is very high, making it feel hotter.
- Risk of storms or typhoons, which can disrupt cruise schedules.
- Cloudy days are common, with fewer guaranteed sunny periods.
Cruise activities in peak Summer
July is one of the hottest months in Halong Bay, with temperatures ranging from 26°C to 34°C (79°F – 93°F) and high humidity. The sea temperature stays around 30°C (86°F), making swimming one of the best activities during a cruise. However, since July falls in the rainy season, occasional downpours or storms can affect outdoor activities, though there are still plenty of dry periods throughout the day.
Kayaking remains a great experience, but due to the heat, it’s best to do it in the morning or late afternoon when temperatures are lower. Strong sun exposure can make midday paddling uncomfortable, so sunscreen and a hat are essential. Beach visits are perfect in July, with hot temperatures making a swim refreshing. However, some beach visits may be affected by sudden rain showers, so flexibility is needed.
Trekking on Cat Ba Island is not ideal, as the heat and humidity make hiking exhausting. If you do go, early morning is the best time. Cycling in Viet Hai village is also possible but can feel challenging in the humid conditions. Cave visits are highly recommended in July, as the cool interior provides a welcome break from the heat, and since they are weather-independent, they remain accessible even on rainy days.
Still unsure about visiting Halong Bay in July? Find out if Halong Bay in rainy season is worth it.
Events and festivals in July
July is one of the quietest months for events in Halong Bay, with no major national or regional festivals. Unlike earlier months that feature national holidays, July is largely free from major celebrations, meaning there are no disruptions to cruises.
However, July is right in the middle of Vietnam’s summer school holiday, meaning more local families travel during this time. While this doesn’t relate to festivals, it does mean busier cruises on weekends, especially with domestic tourists. International travelers may notice more Vietnamese families on board, but this does not impact the cruise experience significantly.
For those looking for a peaceful experience, weekdays are often less crowded than weekends, making July a good time for mid-week cruises.
Tips for visiting Halong Bay in July
July is one of the hottest months in Halong Bay, with high humidity and frequent rain showers. However, with the right preparation, you can still enjoy your cruise, as the warm sea makes swimming and kayaking ideal activities.
What to bring
If you are taking a short trip from Hanoi, you can leave excess luggage at your hotel and bring only what you need for the cruise. Essentials for July include:
- Light, breathable clothing, as temperatures are hot and humid
- High SPF sunscreen, since the sun is strong when it’s not raining
- A rain jacket or poncho, for sudden rain showers
- Swimwear, as the sea is warm and perfect for swimming
- Bug repellent, since mosquitoes are more common in humid weather
- A dry bag, to keep valuables safe from rain and splashes
Cruise availability
July is not the busiest month for international travelers, but it is a peak month for domestic tourism, as Vietnamese families take summer vacations. This makes weekends particularly busy, while weekdays tend to be a bit quieter.
Since July is right in the middle of the rainy season, there is a higher chance of cruise cancellations due to storms. If you are traveling in July, it’s best to book with a flexible cancellation policy in case of unexpected weather changes. The upside is that cruise prices are lower than in peak international months, making it a good time for budget-conscious travelers.
Complete Halong Bay travel guide
Even in the rainy season, Halong Bay has plenty to offer. If you’re considering alternative bays like Bai Tu Long or Lan Ha Bay, exploring Cat Ba Island, or taking a scenic flight over the bay, there are many ways to enjoy your trip beyond a traditional cruise. For a full overview, check out our Halong Bay travel guide.
