Climate and region of Halong Bay
Northern Vietnam, including Halong Bay, experiences distinct seasonal shifts, unlike the year-round tropical warmth of central and southern Vietnam. The dry season runs from November to April, bringing cooler and drier conditions, while the rainy season lasts from May to October, with higher temperatures and increased rainfall. While Sapa, due to its high altitude, can experience very cold winter temperatures, Halong Bay remains relatively mild but noticeably cooler than other regions of Vietnam. Since December falls deep into the dry season, understanding these climate trends provides helpful context for comparing the weather to other months.
Weather in Halong Bay in December
December brings cooler temperatures to Halong Bay, with daily averages ranging from 15°C to 22°C (59°F – 72°F). The air feels much fresher compared to the humid summer months, and rainfall remains minimal, with an average of 20 mm (0.8 inches). This makes December one of the driest months of the year. Humidity is still relatively high, but the cooler air makes it feel much more comfortable. Mist and fog are common in the mornings, creating a scenic and mysterious atmosphere over the limestone formations.
Being deep into the dry season, December offers stable weather conditions, making it an ideal time for cruising. However, temperatures can feel cooler on the water, especially with the sea breeze. Compared to the warmer months, the weather in December is noticeably milder, though it never reaches extreme cold. If you are looking for different weather conditions, read our guide to best time to visit Halong Bay.
Halong Bay cruise in December, is it worth it?
A cruise in Halong Bay in December is a unique experience, offering cooler weather, minimal rain, and an atmospheric mist that gives the bay a mystical feel. As one of the driest months, there is little chance of rain disrupting cruise schedules. However, temperatures can be chilly, especially on the water, so it is not the best time for swimming. December is also a popular travel month due to the holiday season, meaning cruise prices can be higher, especially around Christmas and New Year.
Pros of a December cruise
- Very little rain, making for stable cruise conditions.
- Calm waters, with almost no risk of storms.
- Misty landscapes, creating a scenic and unique atmosphere.
- One of the best months for photography, due to the soft light.
Cons of a December cruise
- Cool temperatures, which can feel chilly on the water.
- Overcast skies are common, with fewer sunny days.
- Higher cruise prices, especially around the holidays.
Cruise activities in Winter
December brings cooler weather to Halong Bay, with temperatures ranging from 15°C to 22°C (59°F – 72°F). The sea temperature drops further to 22°C (72°F), making swimming less popular. While some travelers may still take a dip, most prefer to enjoy the scenery from the cruise rather than enter the water.
Kayaking is still an option, especially for those who enjoy paddling in cooler weather. The misty atmosphere in December creates a unique and peaceful experience on the water. However, strong sea breezes can make it feel colder, so wearing warm layers is recommended. Beach visits are not ideal for sunbathing, but they can still be enjoyable for a scenic walk.
Trekking on Cat Ba Island is one of the best activities in December, as the cooler air makes hiking much more comfortable than in the hot and humid months. Cycling in Viet Hai village is also a great way to explore the island without worrying about overheating. Visiting caves is a must-do in December, as they remain warm compared to the cooler outdoor temperatures, making them a great year-round attraction.
Events and festivals in December
December brings festive decorations and seasonal celebrations to Halong Bay, but the nature of these events is quite different from traditional Vietnamese holidays. While Christmas and New Year’s Eve are not official Vietnamese holidays, their influence can still be seen, especially in the tourism industry.
- Christmas (December 24th–25th) – Vietnam is not a Christian country, but the commercial aspect of Christmas has been widely embraced, especially in major cities and tourist areas. Many Halong Bay cruises decorate with Christmas lights and ornaments, and some may offer special Christmas-themed meals. While you won’t find religious celebrations, the festive decorations add to the charm of a December cruise. It is also worth noting that some cruise prices increase around Christmas due to higher demand.
- New Year’s Eve (December 31st) – Vietnamese people do not celebrate the Western New Year as their main holiday, as Tet (Vietnamese Lunar New Year) in January or February is more important. However, New Year’s Eve is still integrated into the tourism industry, and nearly all Halong Bay cruises host a countdown party on the boat. Compared to large public events in cities like Hanoi, the New Year’s Eve celebrations on a cruise are more intimate, with onboard entertainment and drinks rather than massive fireworks displays.
With cooler weather and a festive atmosphere, December is a special time for a Halong Bay cruise, even though the celebrations are more about decorations and themed meals rather than traditional Vietnamese holidays.
Tips for visiting Halong Bay in December
Visiting Halong Bay in December can be a great experience, especially if you plan ahead for cooler temperatures and the festive holiday season. Here are some useful tips for your trip.
What to bring
Since temperatures are cooler in December, packing appropriately will make your cruise more comfortable. If you’re coming from Hanoi, leave unnecessary luggage at your hotel and bring:
- A warm jacket or sweater, as it can get chilly on the water
- Comfortable shoes, for island visits and cave exploration
- Moisturizer and lip balm, as the air can be dry
- A camera, to capture the misty, atmospheric landscapes
- A festive outfit, if traveling around Christmas or New Year’s Eve
Cruise availability
December starts relatively quiet, but as Christmas and New Year’s Eve approach, demand rises sharply, leading to higher prices and busier cruises. If traveling in the last two weeks of the month, booking in advance is highly recommended.
Many cruises decorate for Christmas and New Year’s Eve, with some offering special meals or countdown parties. While these celebrations are not as lively as in big cities like Hanoi, they create a cozy and intimate atmosphere on the boat.
Complete Halong Bay travel guide
Halong Bay in December offers a unique experience, with cooler weather and a festive atmosphere. If you’re interested in alternative bays like Bai Tu Long or Lan Ha Bay, exploring Cat Ba Island, or taking a scenic flight over Halong Bay, there are many ways to customize your trip. For a full overview, check out our Halong Bay travel guide.
