December reveals a different side of Halong Bay that many travelers never get to see. The morning mists, comfortable temperatures, and calm waters create perfect conditions for exploring. This complete guide will share local expertise about weather, what to do, cruise and travel tips to help you plan an unforgettable trip to Halong Bay in December.
What is the weather like in Halong Bay in December?
December brings mild and pleasant weather to Halong Bay. You can expect daytime temperatures around 18°C (64°F), which feels just right for outdoor activities. The mornings start cool at 14°C (57°F), but by lunch time, the temperature rises to a comfortable 22°C (72°F).
The weather in December stands out because it’s much less humid than other months. The humidity drops to 70%, which means you won’t feel sticky and uncomfortable like you would during summer. It also rains very little – only about 23mm all month. You’ll mostly see clear blue skies with maybe a light drizzle now and then.
The sun shines for about 4 hours each day, from 6:30 AM to 5:30 PM. While swimming might not be your first choice, the sea stays surprisingly warm at 23°C (73°F). One of the prettiest sights you’ll see is the morning mist over the water, which usually clears up by mid-morning to show off the bay’s famous rocks and islands.
The wind stays gentle most days, blowing at 5 to 10 km/h, though it can pick up to 20 km/h sometimes. Just keep in mind that December can bring sudden cold spells from China, dropping temperatures to 10°C (50°F). Pack a warm jacket just in case!
What to do in Halong Bay in December?
Go kayaking
The calm December waters are great for kayaking. You can paddle around limestone islands and through hidden caves. The water stays warm enough that a few splashes won’t bother you. Many spots like Luon Cave are only accessible by kayak, making the trip extra special.
Visit fishing villages
Take a boat to villages like Vung Vieng where people live right on the water. In December, you can watch fishermen work without the summer heat. The cooler weather lets you spend more time learning about their daily life and culture.
Climb Ti Top island
The cool weather in December makes climbing the 400 steps to Ti Top‘s peak much easier than in hot summer months. At the top, you’ll get amazing views of the bay. The beach below is nice for photos, though it might be too cool for swimming.
Visit the amazing caves
December’s dry weather makes it perfect for exploring caves. Sung Sot Cave (Surprise Cave) shows off huge chambers filled with interesting rock shapes. Dark and Bright Cave is very well-known for its rock formations. The cool air makes walking through these caves very pleasant.
Try local food
December is perfect for trying hot Vietnamese soups and fresh seafood. Many boats offer cooking classes where you can learn to make spring rolls and other local dishes. The cool evening weather makes hot dishes taste even better.
3-day or 2-day Halong overnight cruise: Which is better in December?
It’s recommended to pick the 3-day, 2-night cruise in December. By taking a 3 day 2 night cruise, you get more time to see everything without rushing. The nice weather means you can enjoy outdoor activities longer. With three days, you can visit quiet spots that shorter trips skip. While it costs more, you get to do and see much more. If the weather turns foggy, you still have plenty of time to see everything.
A typical 3-day schedule looks like this:
Day 1:
- Morning: Leave from Halong City
- Afternoon: See Sung Sot Cave, go kayaking
- Evening: Watch the sunset, eat dinner, try squid fishing
Day 2:
- Morning: Do Tai Chi, visit Ti Top Island
- Afternoon: See Bai Tu Long Bay and Vung Vieng village
- Evening: Learn to cook Vietnamese food
Day 3:
- Morning: Visit Trinh Nu Cave
- Afternoon: Head back to Hanoi
If you pick a 2-day trip, you’ll follow day 1’s schedule and mix some activities from days 2 and 3 into your second day. You might focus on Halong Bay, Bai Tu Long Bay or Lan Ha Bay or on closer spots like Ti Top Island.
>>> Maybe you want to read more: Halong Bay Cruise – A complete 2 days 1 night itinerary & Insider tips
Travel tips
- Pack layers – bring both light clothes and a warm jacket
- Bring good walking shoes for cave visits
- Book your cruise ahead – December is popular
- Bring a camera for the misty morning views
- Keep some free time in your schedule in case of weather changes
- Choose a cruise with a covered deck for comfort
- Bring motion sickness pills if you’re worried about the waves day night
December offers some of the best conditions for visiting Halong Bay. The cool, dry weather lets you enjoy outdoor activities comfortably. Whether you choose a 2-day or 3-day cruise, you’ll see stunning views and make great memories. Just remember to pack for changing weather, and you’ll have an amazing trip.
Mo Nguyen – From Vietnam Travels Online
