Climate and region of Halong Bay
Halong Bay, like the rest of northern Vietnam, follows a seasonal climate that differs from the more tropical conditions of central and southern Vietnam. The rainy season lasts from May to October, bringing higher temperatures, increased humidity, and frequent showers, while the dry season begins in November and lasts until April, offering cooler and more stable weather. Unlike Sapa, which experiences harsher winter conditions due to its altitude, Halong Bay’s climate is milder but still goes through noticeable seasonal changes. Since October marks the transition from the rainy season to the dry season, understanding the regional climate helps put the month’s weather into perspective.
Weather in Halong Bay in October
October marks the end of the rainy season in Halong Bay, bringing a noticeable shift in weather conditions. Temperatures start to cool down slightly, ranging from 23°C to 30°C (73°F – 86°F), making it more comfortable compared to the peak summer months. Rainfall decreases to an average of 130 mm (5.1 inches), significantly lower than in previous months, but occasional showers and lingering humidity are still present, especially in the first half of the month. The risk of tropical storms declines, though some may still occur early in the month.
As October progresses, the skies become clearer, and dry, sunny days become more frequent. The weather is more stable than in previous months, and cruise conditions improve as the seas become calmer. With the shift from the rainy season toward the dry season, October offers a good balance of warmth, fewer storms, and increasingly better conditions for visiting the bay. You can also read our full overview of weather throughout the year in Halong Bay, in our guide what to expect in Halong Bay per month.
Halong Bay cruise in October, is it worth it?
A cruise in Halong Bay in October is a great choice, as the weather begins to transition from the rainy season to the drier months. The first half of the month can still see occasional showers, but rainfall decreases significantly compared to September. Temperatures remain warm but are more comfortable than in the peak summer months. Humidity also starts to drop, making time on the cruise deck more pleasant. October is not yet at its busiest, so you can enjoy relatively stable weather without the peak-season crowds or prices.
Pros of an October Cruise
- Less rain compared to previous months, with more stable weather.
- Comfortable temperatures, not too hot or too cold.
- Calmer seas, making for smoother cruising conditions.
- Fewer tourists than peak season, leading to a more relaxed experience.
Cons of an October Cruise
- Rain is still possible early in the month, though less frequent.
- Humidity is still present, though lower than in summer.
- Not the absolute driest month, but a good balance between seasons.
Cruise activities in Autumn
October marks the transition from the rainy season to the dry season, bringing a mix of sunny and cloudy days with occasional rain showers. Temperatures are comfortable, ranging from 23°C to 30°C (73°F – 86°F), and the sea remains warm at around 28°C (82°F), making swimming still a great option. Rainfall decreases throughout the month, and outdoor activities become more enjoyable as humidity levels drop.
Kayaking in October is one of the best experiences, as the weather is cooling down, making paddling around the limestone formations more pleasant than in the humid summer months. Beach visits are also more enjoyable, as the sun is not as intense, yet the water remains warm enough for swimming. Ti Top Beach and Soi Sim Beach are still good choices, though the transition to the drier season means they start seeing more visitors.
Trekking on Cat Ba Island becomes a much better option in October, especially in the second half of the month when the weather is drier. Cycling through Viet Hai village is also a comfortable activity, with less intense heat compared to previous months. Visiting caves remains a fantastic choice, especially on cloudy or drizzly days when outdoor activities may be less ideal.
Events and festivals in October
October is a month with cultural significance in Vietnam, featuring one of the most well-known traditional celebrations. While Halong Bay cruises do not offer direct experiences of these festivals, visitors may still notice some small festive touches on their boat.
- Mid-Autumn Festival (dates vary, usually late September or early October) – This festival is a beloved holiday for children, celebrated with lantern displays, lion dances, and mooncakes. While it is a major event in cities and towns across Vietnam, it is not heavily observed on a Halong Bay cruise. However, many cruises decorate with lanterns, and some may offer mooncakes as part of the dining experience. To fully enjoy the lively celebrations, it is best to visit a city like Hanoi before or after your cruise.
- Halloween (October 31st) – Halloween is not a traditional Vietnamese holiday, but it has gained popularity in recent years, especially in tourist areas. Some Halong Bay cruises may have Halloween-themed decorations, but there are no official Halloween parties or large-scale celebrations on the boats. Travelers should not expect much beyond some decorative touches on international-focused cruises.
While October has these small festive elements, it does not impact cruise schedules or pricing. Travelers can enjoy a typical Halong Bay experience without the disruptions that major Vietnamese holidays can bring.
Tips for visiting Halong Bay in October
Preparing for your trip to Halong Bay in October ensures a smoother experience, as weather and tourist numbers start shifting. Here are some useful travel tips to keep in mind.
What to bring
If you’re heading on a short cruise from Hanoi, you can store large luggage at your hotel and bring just the essentials. Pack:
- Light, breathable clothing, as temperatures remain warm
- A light rain jacket, since occasional showers are still possible
- Comfortable walking shoes, for island visits and cave exploration
- Sunscreen and sunglasses, as sunny days increase
- A camera, to capture clear skies and scenic views
Cruise availability
October is a great time to visit Halong Bay, with moderate tourist numbers and improving weather. While not a peak month, international travelers start returning, and availability can begin tightening toward the end of the month.
If the Mid-Autumn Festival falls in early October, some cruises may feature small themed decorations, but this does not significantly affect travel plans. Overall, October offers steady availability and good prices, though it’s always smart to book in advance for mid-range and luxury cruises.
Complete Halong Bay travel guide
We’ve shared key travel tips for October, but there is much more to explore in Halong Bay. From discovering alternative bays like Bai Tu Long and Lan Ha Bay, visiting Cat Ba Island, or taking a scenic flight, to exploring hidden caves and floating villages, there are many ways to experience the bay. For a complete guide, check out our Halong Bay travel guide.
