Halong Bay Weather in July: Complete Guide for a Smooth Summer Visit

Halong Bay Weather & Temperature in July

Halong Bay weather July

Average Temperature (Day & Night)

In July, Halong Bay experiences peak summer heat. Daytime temperatures typically range from 32°C to 33°C (90 - 91°F), with occasional spikes reaching 35 - 37°C during heat waves. At night, the mercury dips slightly to around 25 - 26°C (77 - 78°F), offering some relief from the daytime heat.

However, the “real-feel” temperature, factoring in humidity and wind, can climb up to a sweltering 48°C (118°F) at midday. These conditions make outdoor activities most comfortable in the early morning or late afternoon. Travelers should stay hydrated, wear lightweight clothing, and limit prolonged sun exposure during the hottest parts of the day.

Halong Bay in july is hot and humid with daytime highs around 32–33°C

Rainfall Statistics

July is one of the wettest months in Halong Bay, with average rainfall between 230mm and 287mm. Visitors can expect 22 - 28 rainy days throughout the month. However, the rain typically falls as short, intense showers, often in the late afternoon or evening.

Storms may develop quickly but usually pass just as fast, making it possible to resume outdoor activities shortly after. It’s wise to carry a compact umbrella or raincoat when exploring, and to allow flexibility in your itinerary. Rainy spells also bring lush greenery to the bay’s limestone cliffs, creating moody, photogenic landscapes for nature lovers.

July is one of Halong Bay’s wettest months with frequent showers mostly in the late afternoon

Humidity Levels

Humidity levels in Halong Bay during July are extremely high, ranging from 81% to 90%. This contributes significantly to the oppressive heat, making the actual conditions feel hotter than what the thermometer shows. Such high humidity can lead to sticky, uncomfortable days and affect physical stamina, especially during hikes or kayaking trips.

Travelers prone to dehydration or heat exhaustion should take frequent breaks, drink water often, and avoid strenuous activity during peak hours. Booking accommodations or cruise ships with air conditioning and access to pools or indoor lounges can make the humid climate much more manageable.

Air Quality & UV Index

Air quality in Halong Bay during July is generally moderate, though it may decline slightly during rainy periods due to increased moisture and haze. The UV index regularly peaks at level 7 (high), with occasional midday spikes reaching 12 - 13, especially on sunny days. This means sunburn can occur in just 10 - 20 minutes of direct exposure.

Visitors should wear broad-spectrum sunscreen (SPF 50+), sunglasses, and wide-brimmed hats when out on deck or the beach. UV-protective clothing is also recommended for sensitive skin. Always check daily weather apps or cruise updates for UV and air quality alerts before setting out.

Typical Weather Patterns

Halong Bay’s July weather is characterized by daily tropical showers and high humidity, often paired with clear blue skies in the morning. Sudden rainstorms are common in the afternoons, typically followed by short periods of sunshine and calm. Mornings tend to be clearer and more suitable for excursions, while evenings may bring thunderstorms.

Despite the rainfall, the sea temperature stays invitingly warm at around 30 - 31°C (86 - 88°F), perfect for swimming, kayaking, and snorkeling. Lightning and high winds may occasionally delay or cancel cruise activities, so it's essential to maintain a flexible schedule and monitor local forecasts regularly.

Despite the rain, Halong Bay’s warm waters in July are great for swimming and kayaking

For up-to-date insight into Hanoi weather near Halong Bay, refer to the forecast above.

Is July Worth Visiting Halong Bay? Let’s Break It Down

Yes, July can be a rewarding time to visit Halong Bay if you're prepared for the summer elements. The hot weather makes it ideal for water activities like swimming, kayaking, and snorkeling, with warm sea temperatures enhancing the experience. Fewer tourists also mean more peaceful scenery, better photo opportunities, and access to off-peak cruise and hotel discounts.

However, travelers should be mindful of the season's unpredictability. Sudden storms, heavy rainfall, and occasional typhoons may lead to cruise delays or cancellations, requiring flexibility in plans. The combination of high heat and humidity can also be intense during midday, so pacing your activities and staying hydrated is essential.

July is a great time to visit Halong Bay if you enjoy serene views and don’t mind the heat and rain

>> For those who may concern Halong Bay Rainy Season: Should You Travel or NOT?

Top 5 Iconic Sites to Visit in Halong Bay in July

Here are the top 5 iconic sites you shouldn’t miss when visiting Halong Bay in July - each offering breathtaking scenery, cultural charm, and unforgettable photo opportunities. These spots are usually included in cruise itineraries!

Hon Trong Mai (Fighting Cock Islets)

These two iconic limestone islets resemble a rooster and a hen facing each other, symbolizing love and fidelity. Their unique shape has made them one of Halong Bay’s most photographed landmarks. You’ll spot them on nearly every standard cruise route.

• Location: Near the center of Halong Bay

These iconic limestone islets symbolize love and are among Halong Bay’s most photographed sights

Hang Sung Sot (Surprise Cave)

Hang Sung Sot, also known as Surprise Cave, is the most famous and spacious grotto in Halong Bay. Located on Bo Hon Island, the cave features two vast chambers filled with spectacular stalactites and stalagmites. A short climb leads you to its entrance, where stunning views of the bay await.

• Location: Bo Hon Island

Sung Sot Cave has two large chambers and offers stunning bay views

Ti Top Island

This island is famous for its crescent-shaped beach with powdery white sand and clear, shallow waters. A short but steep climb leads to a panoramic viewpoint overlooking Halong’s emerald seascape. It’s ideal for both relaxation and photography.

• Location: East of Dau Go islet

Titop Island is known for its white sand beach and a short steep hike to a panoramic view

Lang Viet Hai (Viet Hai Fishing Village)

Hidden in the heart of Cat Ba Island, Viet Hai is a peaceful village surrounded by jungle and limestone mountains. Visitors can bike through rice fields, interact with locals, and enjoy traditional meals. It offers a cultural escape from Halong’s usual cruise routes.

• Location: Northern Bay Area

Viet Hai is a quiet village surrounded by jungle and limestone peaks on Cat Ba Island

Hang Dau Go (Wooden Stakes Cave)

Hang Dau Go is steeped in legend, believed to be the hiding place of wooden stakes used by Vietnamese forces in battle. The cave’s towering rock formations resemble mushrooms and mythical creatures. It’s often accessed by bamboo boat, adding to its tranquil appeal.

• Location: Central Halong Bay

Hang Dau Go is believed to have hidden wooden stakes used by Vietnamese Forces in an ancient battle

Your Ideal Itineraries to Visit Halong Bay in July

2‑Day, 1‑Night Land‑Based Flexible Trip

Perfect if you're looking for a more flexible and budget-friendly experience. This option focuses on land-based activities, avoiding the risk of overnight cruise cancellations due to bad weather while still letting you enjoy the bay’s highlights.

Day 1: Arrival & Local Exploration

• Morning: Start your journey with a comfortable limousine bus transfer from Hanoi to Ha Long City, which takes about 3 hours. Upon arrival, treat yourself to a delicious seafood lunch at a local restaurant near Bai Chay Beach.
• Afternoon: Spend the afternoon relaxing at Bai Chay Beach, ideally after 16:00 to avoid the intense heat. If you're up for more activity, consider visiting Ha Long Sun World or riding the Queen Cable Car for a stunning panoramic view of the bay.
• Evening: Enjoy dinner at a beachfront restaurant or local eatery serving fresh seafood. Afterward, take a leisurely walk along the Bai Chay promenade or explore the lively night market before checking into a 3 - 4 star hotel near the beach.

Relax at Bai Chay Beach in the late afternoon to recharge for your next adventure

Day 2: Day Cruise & Return to Hanoi

• Morning: Embark on a 4 - 5 hour shared cruise around Halong Bay, where you’ll visit the famous Sung Sot (Surprise) Cave and paddle through the tranquil waters of Luon Cave by bamboo boat or kayak. A light Vietnamese lunch will be served on board as you cruise through the bay's scenic limestone landscape.
• Afternoon: After returning to the port, begin your journey back to Hanoi in the early afternoon.

3‑Day, 2‑Night Cruise + Local Exploration

Best suited for Western travelers seeking a balance of nature, culture, and relaxation, this itinerary combines a night on land with an overnight cruise for maximum flexibility.

Tips: BestPrice recommends staying at a hotel on the first night and boarding the cruise on the second day. This option allows you to better monitor weather conditions and adjust your schedule if needed, ensuring a smooth and stress-free experience even if rain or storms occur.

Day 1: Arrive & Explore

• Morning: Begin with a comfortable limousine transfer from Hanoi to Ha Long City. Upon arrival, check into your hotel and enjoy a refreshing welcome drink to settle in.
• Afternoon: After lunch at your hotel or a nearby local restaurant, spend the afternoon exploring Ha Long’s mainland attractions. You can visit Quang Ninh Museum for a cultural insight or enjoy thrilling rides at Sun World Ha Long Park, then unwind with panoramic views at Panorama Café.
• Evening: Dine at a cozy local restaurant and enjoy leisure time afterward. Whether it's live music, a cocktail by the beach, or a night stroll along the promenade, the evening is yours to relax and soak in the coastal charm.

Day 2: Embark on the cruise

• Morning: Have breakfast at your hotel before transferring to the cruise port. Board a mid-range or luxury cruise like Peony, Orchid, or Sena, and savor a delightful lunch while gliding through Halong’s limestone islets.
• Afternoon: Explore Dark & Bright Cave by bamboo boat or kayak and enjoy optional swimming in the calm waters of Lan Ha Bay. The scenery and activities offer the perfect blend of adventure and serenity.
• Evening: Join a sunset party on the sundeck, followed by a Vietnamese cooking class. A seafood dinner awaits you onboard, and you can cap off the night with squid fishing or stargazing from the deck.

Kayak through the serene waters of Lan Ha Bay and admire towering limestone cliffs

Day 3 Cruise & Return

• Early Morning: Start the day with Tai Chi on the sundeck, accompanied by the peaceful sounds of the bay. A light breakfast follows to energize you for the final activities.
• Morning Excursion: Take a short kayaking trip or visit a nearby floating fishing village to experience local life on the water. This gentle adventure wraps up your cruise journey.
• Afternoon: Enjoy a light brunch as the cruise returns to the harbor. After disembarkation, transfer back to Hanoi or continue your trip to destinations like Ninh Binh or Cat Ba Island.

>> Wondering if July is right? Check Halong Bay seasons and weather tips.

Useful Local Tips for Foreign Travellers

Booking tips:

• Halong Bay weather in August and July can experience bad weather like typhoons, or heavy rain. You had better keep an eye on the weather forecast.
• If you may encounter a storm, contact your cruise operator or travel consultant to double-check and have a backup plan.
• If the cruise is allowed to run, just enjoy it. There is no need to worry about the safety of the cruise on Halong Bay.
• Plan to travel to Halong Bay first. If the weather is bad and you have to cancel the cruise trip, pick up other places on your list to travel first, then continue with Halong Bay. Typhoons or heavy rains will not last long.
• If it rains when you are on the cruise. There are still a lot of things for you to do. Below are some recommendations for you:

• Enjoy the spa & massage
• Savour colorful cocktails at the bar
• Join a cooking class on board
• Play games and make new friends on the board

As you plan, also check the Halong Bay September weather, which will give you insight into what to expect in the next month if you're worried about the weather condition in July.

Packing tips:

• Bring light clothes, especially loose-fitting clothing such as wide-leg pants and oversize shirts made from breathable fabrics
• Bring caps, hats, and sunglasses to protect your eyes from the intense sunlight of summertime
• Sunscreen is a must-bring item in July. UV Radiation can cause health effects such as skin cancer, premature aging, and other skin damage.

FAQs About Halong Bay July Weather

1. Does it rain often in July?

Yes. Halong Bay experiences rainfall on approximately 22 - 28 days during July. Most showers are short and occur in the afternoon or evening, often followed by clear skies.

2. Are there any storms or typhoons in July?

Yes. July is part of Vietnam’s typhoon season, so occasional tropical storms may occur. It’s important to check real-time weather updates and stay in touch with your cruise operator for any last-minute changes.

3. Is it windy in Halong Bay in July?

Generally, winds are mild, ranging from 8 to 15 km/h, making it calm enough for cruising. However, during storms or heavy rain, wind speeds can increase temporarily, so always monitor weather conditions if you're planning to sail.

July in Halong Bay brings intense heat, high humidity, and frequent showers, but also warm seas, fewer crowds, and great deals. With careful planning, flexible itineraries, and the right packing, you can enjoy a rewarding summer coastal escape.

Ready to book? Explore cruises now with BestPrice Travel and get your July adventure started!

Jenny Tran

(Image sources: Internet)