Halong Bay Weather in April
April is a good month to visit Halong Bay as there are few risks of storm and the weather is very accommodating for an outdoors trip.
- April signals the end of the peak season so it will be less busy than previous months.
- The weather is much warmer with higher temperatures and humidity.
- This is a perfect time for water-based and outdoor excursions.
Halong Bay's weather in April 2025 continues a familiar comfortable pattern from March, marking the onset of summer. Expect warmer average temperatures along with increased humidity and rainfall during this month.
Despite the seasonal shift, this weather is still quite favorable for a cruise vacation and outdoor exploration of Halong Bay. However, the number of tourists typically begins to decline gradually as the month progresses.
Halong Bay's weather in April
April is considerably warmer than the preceding months. The average temperature reaches 24°C (75°F), with highs reaching 29°C (84°F) and lows of 21°C (70°F). Sea temperatures also rise, averaging 30°C (86°F), making it a perfect time to don your shorts and flip-flops to fully enjoy the sun and sea.
This month boasts one of the highest amounts of daily sunshine, rivaling May, June, November, December, and March. Humidity remains around 75%, similar to March, which is manageable compared to the summer months when humidity can exceed 90%.
Rainfall increases in April, particularly towards the end. Expect about 14 rainy days with total precipitation around 60 mm (2.36 inches). However, these rains typically do not cause significant disruptions, so don’t let this deter your travel plans!
April weather averages in recent years:
| Month | High / Low (°C/°F) | Average rainfall (MM) | Days with rain |
|---|---|---|---|
| April (2021) | 28.5°C (83.3°F) / 21.1°C (70°F) | 78.4mm / 3.08in | 13 days |
| April (2022) | 31°C (87.8°F) / 23.5°C (74.3°F) | 65mm / 2.56in | 10 days |
| April (2023) | 29°C (84.2°F) / 22.0°C (71.6°F) | 50mm / 1.97in | 09 days |
| April (2024) | 30°C (86°F) / 21°C (69.8°F) | 57mm / 2.24in | 10 days |
| April (2025) | 30°C (86°F) / 22°(71.6°F) | 60mm / 2.36in | 14 days |
Weather in Halong Bay in April (Summary of the last 3 years)
Pros & Cons of visiting Halong Bay in April
Pros
- Sunny days and warm sea temperatures create the perfect conditions for enjoying Halong Bay. Most activities are viable in April, with minimal weather-related disruptions.
- This is an excellent time to engage in water sports and snorkeling, as the air and water temperatures are ideal.
- The end of the peak tourist season means popular sites in Halong Bay become less crowded compared to the earlier months.
Cons
- Despite pleasant weather, April still draws a sizable number of visitors, so it’s advisable to book tours and accommodations well in advance.
- Some services and shops may close during national holidays.
Events in Halong Bay in April
April is a vibrant month filled with traditional festivals and public holidays.
Visitors can take part in the Yen Tu Festival, held at the base of Yen Tu Mountain. This festival occurs on the 10th day of the first lunar month, lasting for three months. Another significant event is the Cua Ong Festival, celebrated from the 2nd day of the first lunar month through the 30th day of the third lunar month.
1Additionally, April features the Hung Kings Commemoration, which is a national holiday occurring on the 10th day of the third lunar month. Many Vietnamese take time off work and school, so be prepared for larger crowds at popular sites.
Hùng Kings' Festival in Phu Tho, Vietnam (Photo: Shutterstock)
Hung Kings Festival by year:
- Mon, April 7, 2025
- Sun, April 26, 2026
Additionally, Reunification Day on April 30 offers a chance to learn more about local traditions, with various fireworks shows and celebrations in major Vietnamese cities.
Best things to do in Halong Bay in April
Overnight cruise
Cruising is an essential experience when visiting Halong Bay. The journey promises numerous exciting activities aboard the ship and at various attractions. While options range from day cruises to 2-day cruises and 3-day cruises, opting for a 3-day cruise allows for a deeper immersion into the bay's beauty and more exhilarating experiences.
Squid fishing
April marks the beginning of the squid season, making it an excellent time to engage in this unique nighttime fishing experience aboard your cruise ship.
Biking and mountain climbing
The pleasant weather in Halong Bay during April is conducive to outdoor adventures. You can enjoy biking around Viet Hai fishing village, climb to scenic mountain tops, or trek through Cat Ba National Park.
Water-based activities
With warm weather and low rain chances, conditions are ideal for various water activities. In addition to swimming, you can try kayaking, snorkeling, and canoeing in stunning locations like Luon Cave, Dark & Bright Cave, and the Ao Ech region.
Seaplane tours
For a truly spectacular experience, consider taking a seaplane tour for breathtaking aerial views of Halong Bay. A 25-minute journey generally costs around $75, offered by Hai Au Aviation.
What to pack when traveling Halong Bay in April
As April can reach highs of 29°C, bring summer attire such as shorts, t-shirts, dresses, and skirts. Swimwear is essential for enjoying the warm waters.
Given the strong sun, it's wise to pack a hat and sunscreen to protect your skin. While cold days are rare, if you're sensitive to cooler temperatures, consider bringing a light sweater for evenings.
Local tips
April provides perfect weather for exploring Halong Bay, but here are a few tips to enhance your visit:
- Due to several national holidays, Halong Bay can become quite crowded in April. Check your travel dates early to avoid potential overcrowding and price increases.
- Pack appropriate summer clothing and essential items, including sunscreen, to protect your skin from sunburn.
