
1. How is Lan Ha Bay weather?
Nestled in the south of Ha Long Bay and east of Cat Ba Island, Lan Ha Bay is an emerging travel destination for both local and international tourists. Covering an area of over 7,000 hectares, the bay boasts more than 400 islands, some of which remain untouched and pristine.

The beauty of the bay is breathtaking, no matter the Lan Ha Bay weather (Source: Collected)
Lan Ha Bay experiences all four seasons typical of northern Vietnam. Thanks to its coastal and mountainous surroundings, the weather in Lan Ha Bay is fresh and mild year-round. The average temperature ranges from 25°C to 28°C, reaching up to 30°C in summer while dropping to 15-20°C in winter.
2. Details of Lan Ha Bay weather by season
2.1. In the spring
- Months: February – April
- Average temperature: 18°C – 26°C
Spring is one of the best seasons to visit Lan Ha Bay. Despite the light drizzle, the calm waters, pleasant climate, and blue skies make it perfect for activities like Lan Ha Bay kayaking, sightseeing, and boat tours. The cool yet sunny Lan Ha Bay weather in this season allows visitors to comfortably explore the bay without the intense summer heat.

If you prefer a quieter trip, spring is a good time when Lan Ha Bay weather is mild (Source: Collected)
2.2. In the summer
- Months: May – August
- Average temperature: 26°C – 33°C
Summer is the peak season for domestic tourists. The warm temperature makes swimming, sunbathing, and kayaking incredibly enjoyable. Many travelers opt for one-day cruises to explore Lan Ha Bay’s hidden caves and beaches. However, this season also brings occasional showers and storms, which may cause cruise cancellations.

Many tourists love visiting when the weather in Lan Ha Bay is warm and sunny (Source: Collected)
2.3. In the autumn
- Months: September – October
- Average temperature: 20°C – 32°C
For international visitors, autumn is an ideal time to explore Lan Ha Bay. The pleasant Lan Ha Bay weather allows for kayaking, trekking, and sightseeing without the summer crowds. The tranquil atmosphere makes the bay a romantic getaway or a perfect spot for family vacations. Additionally, this season is great for sampling fresh seafood from the nearby islands.

The mild Lan Ha Bay weather in autumn makes it ideal for a peaceful retreat (Source: Collected)
2.4. In the winter
- Months: November – January
- Average temperature: 12°C – 22°C
Winter in Lan Ha Bay offers a unique travel experience, especially for those seeking a peaceful retreat. Many cruises organize special celebrations during the holiday season. While the tropical climate keeps it warmer than many other countries, December’s frequent fog may reduce visibility. If you prefer a broader exploration, booking a Halong Bay cruise tour can provide breathtaking views despite the winter mist.

Winter Lan Ha Bay weather is cooler but still great for sightseeing (Source: Collected)
Check out Northern Vietnam weather and get useful travel tips
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3. Best time to visit according to Lan Ha Bay weather
Lan Ha Bay experiences all four seasons typical of northern Vietnam. The best time to visit depends on your travel preferences:
- Summer: This is peak tourist season with calm seas, sunny skies, and warm weather, making it ideal for swimming, cruising, and exploring the bay’s limestone islands. However, it can be crowded, and occasional summer storms might disrupt travel plans.
- Autumn: A quieter, more peaceful time for those who prefer a relaxing retreat. The mild weather in Lan Ha Bay is perfect for outdoor activities like kayaking, trekking, and seafood tasting on nearby islands.
- Winter & Spring: While temperatures are cooler, this period offers a serene atmosphere. Winter is particularly attractive to international tourists seeking a mild tropical climate, while spring brings pleasant temperatures and clear skies for sightseeing.

Lan Ha Bay is worth visiting year-round (Source: Collected)
Explore the best time to go to Ha Long Bay
4. How to dress & prepare for weather in Lan Ha Bay?
To enjoy your trip to Lan Ha Bay comfortably, check the weather forecast and pack accordingly. Here are some clothing recommendations for different seasons and activities:
- Summer
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- Lightweight, breathable fabrics like linen, cotton, or chiffon are best for the hot and humid weather.
- Opt for casual wear such as T-shirts, shorts, crop tops, and sundresses for easy movement during outdoor activities.
- Swimwear is a must for water activities like kayaking, snorkeling, and swimming. Bring a beach cover-up or a lightweight kimono for added style and sun protection.
- Sun protection is essential, so pack sunglasses, a wide-brimmed hat, and sunscreen.
- Autumn & Spring
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- The weather is mild, so comfortable clothing like long-sleeve shirts, light sweaters, or jackets is recommended, especially for cooler evenings.
- This is the perfect season for boat cruises and sightseeing, so bring elegant outfits like maxi dresses or smart casual wear for beautiful photos on deck.
- Closed-toe shoes or sandals are ideal for island excursions and trekking adventures.
- Winter
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- Bring warm layers like sweaters, jackets, or scarves to stay comfortable in the chilly breeze.
- A stylish coat or a warm shawl will help keep you cozy while enjoying the scenery on a cruise.
If you visit during the rainy months, keep these tips in mind for a hassle-free trip:
- Check the weather forecast before departure to adjust plans accordingly. If severe storms are predicted, consider rescheduling for safety.
- Bring a raincoat instead of an umbrella, as strong winds can make umbrellas impractical.
- Avoid swimming or kayaking in bad weather, as rough waters can be dangerous.

Before packing, check the Lan Ha Bay weather forecast to plan your outfits (Source: Collected)
What’s the difference between Ha Long Bay vs Lan Ha Bay? Find out in this article!
Lan Ha Bay weather varies by season, offering unique experiences throughout the year. Whether you seek sunny beach days, scenic hikes, or peaceful retreats, planning your visit around the weather will enhance your trip. Prepare accordingly with suitable clothing and travel essentials for a seamless adventure in this breathtaking bay!
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