Halong Bay Weather
& Best Time To Visit | 2018 Guide

Halong Bay is no exception to the rule. Hence, to get the most out of your trip and admire the amazing beauty of Halong Bay, you should know the best time to make a move on your holiday plan. And this blog would help you figure it out.

Halong Bay is located in the North of Vietnam – 165 km away from Hanoi capital. That’s why the weather in Hanoi and Halong Bay is kinda similar to each other: they both have typical tropical monsoon climate. While the South of Vietnam has only two seasons (which are rain and dry season). Halong Bay has 4 seasons: spring, summer, fall and winter with its own weather features. Take a look at the following table and charts for an overview of the weather conditions in Halong:

  • Best weather
  • Good weather
  • Average weather

DESTINATION

HALONG BAY

AVERAGE TEMPERATURE (Centigrage)

17%

17oC

AVERAGE RAINFALL (mm)

1.1%

3 mm

AVERAGE SUNSHINE HOUR (h)

7%

7 h

AVERAGE SEA TEMPERATURE (Centigrade)

29%

29oC

Average weather in February

DESTINATION

HALONG BAY

AVERAGE TEMPERATURE (Centigrage)

18%

18oC

AVERAGE RAINFALL (mm)

8.3%

22 mm

AVERAGE SUNSHINE HOUR (h)

7%

7 h

AVERAGE SEA TEMPERATURE (Centigrade)

29%

29oC

Average weather in March

DESTINATION

HALONG BAY

AVERAGE TEMPERATURE (Centigrage)

20%

20oC

AVERAGE RAINFALL (mm)

20%

53 mm

AVERAGE SUNSHINE HOUR (h)

8%

8 h

AVERAGE SEA TEMPERATURE (Centigrade)

29%

29oC

Average weather in April

DESTINATION

HALONG BAY

AVERAGE TEMPERATURE (Centigrage)

23%

23oC

AVERAGE RAINFALL (mm)

22%

57 mm

AVERAGE SUNSHINE HOUR (h)

8%

8 h

AVERAGE SEA TEMPERATURE (Centigrade)

29%

29oC

Average weather in May

DESTINATION

HALONG BAY

AVERAGE TEMPERATURE (Centigrage)

28%

28oC

AVERAGE RAINFALL (mm)

66%

175 mm

AVERAGE SUNSHINE HOUR (h)

8%

8 h

AVERAGE SEA TEMPERATURE (Centigrade)

28%

28oC

Average weather in June

DESTINATION

HALONG BAY

AVERAGE TEMPERATURE (Centigrage)

29%

29oC

AVERAGE RAINFALL (mm)

65%

172 mm

AVERAGE SUNSHINE HOUR (h)

8%

8 h

AVERAGE SEA TEMPERATURE (Centigrade)

27%

27oC

Average weather in July

DESTINATION

HALONG BAY

AVERAGE TEMPERATURE (Centigrage)

29%

29oC

AVERAGE RAINFALL (mm)

76%

201 mm

AVERAGE SUNSHINE HOUR (h)

7%

7 h

AVERAGE SEA TEMPERATURE (Centigrade)

27%

27oC

Average weather in August

DESTINATION

HALONG BAY

AVERAGE TEMPERATURE (Centigrage)

29%

29oC

AVERAGE RAINFALL (mm)

100%

265 mm

AVERAGE SUNSHINE HOUR (h)

6%

6 h

AVERAGE SEA TEMPERATURE (Centigrade)

26%

26oC

Average weather in September

DESTINATION

HALONG BAY

AVERAGE TEMPERATURE (Centigrage)

28%

28oC

AVERAGE RAINFALL (mm)

72%

190 mm

AVERAGE SUNSHINE HOUR (h)

7%

7 h

AVERAGE SEA TEMPERATURE (Centigrade)

27%

27oC

Average weather in October

DESTINATION

HALONG BAY

AVERAGE TEMPERATURE (Centigrage)

25%

25oC

AVERAGE RAINFALL (mm)

20%

54 mm

AVERAGE SUNSHINE HOUR (h)

7%

7 h

AVERAGE SEA TEMPERATURE (Centigrade)

29%

27oC

Average weather in November

DESTINATION

HALONG BAY

AVERAGE TEMPERATURE (Centigrage)

5%

22oC

AVERAGE RAINFALL (mm)

3%

12 mm

AVERAGE SUNSHINE HOUR (h)

8%

8 h

AVERAGE SEA TEMPERATURE (Centigrade)

28%

28oC

Average weather in December

DESTINATION

HALONG BAY

AVERAGE TEMPERATURE (Centigrage)

19%

19oC

AVERAGE RAINFALL (mm)

9%

23 mm

AVERAGE SUNSHINE HOUR (h)

8%

8 h

AVERAGE SEA TEMPERATURE (Centigrade)

29%

29oC

From May to September the weather tends to be hot and humid with sporadic summer storms, and from October until April it is mainly dry and cool.

To give you a more detailed insight into the Halong Bay weather, this article will go through all four seasons.

1. From JANUARY to MARCH – Mystical Halong Bay

halong bay weather from January to March

Overall weather: Foggy, Drizzle, Cooler than usual – but still relatively warm, clear skies

Weather breakdown:

  • Temperature: Average of 18.3 celsius degrees, with the warmest in March at 20 celsius degree and the coolest in January at 17.
  • Rainfall: The winter months are the driest months of the year, which is one of the main reasons this is considered to be “high season”. Rain at this time of year is minimal (3 – 53 mm).
  • Sunlight: Average of 7.3 hours of direct sunlight.
  • Humidity: Humidity levels are at their lowest in the winter months thanks to the infrequent rains and plentiful sunshine. Averages linger from 65-70%.

Tourist season: High season but it’s your chance to experience Tet Holiday – Vietnamese New Year

Halong Bay weather on Tet holiday
Vietnamese New Year - Tet Holiday
Halong bay weather during Tet holiday
Flower market during Tet Holiday
Halong bay Vietnam weather during tet holiday
Lion Dance in Tet Holiday

Recommendations:

  • January to March is the best time of the year to enjoy swimming in Halong Bay thanks to the high average sea temperatures (29 degrees Celsius).
  • Only pack light clothes and of course – don’t forget your swimsuit and sun cream. Sun will be surprisingly strong in March.
  • If you travel in January, some cardigan would be better in case of some strong wind

2. From APRIL to MAY – Halong Bay say Hello to Spring

halong bay weather from april to may

Overall weather: Not too hot, more rain and humid
Weather breakdown:

  • Temperature: Average Spring temperatures are 25.5 Celsius degrees, with April bringing the coolest temperatures at 23 degrees, and May the highest at 28.
  • Rainfall: April is generally very dry with infrequent rains, while May often represents the beginning of the summer storms, and averages 14 days of rain in the month.
  • Sunlight: Each month brings a respective 8 hours of daily direct sunshine, which is the highest levels of the year.
  • Humidity: Expect moderate humidity in the summer months, with averages of 75-78% (this tends to get higher as the stormy summer months approach).

Tourist season: end of high season, with a few public holidays (Labor Day)

Tips:

  • Actually, Halong Bay celebrates many festivals throughout the year, which is a wonderful way to experience traditional Halong Bay culture. One of the most famous festivals here is the Halong Bay Carnival, which features singing, dancing, parades, costumes, fireworks, and loads of performances put on by the locals. This usually takes place at the end of April or start of May.
Halong Bay Carnival
Halong Carnival
Halong Bay carnival - best time to visit
  • These “spring” months are perhaps the best time to visit Halong Bay, because you avoid the peak season, but the weather is still pretty good and there are so many things for you to explore and enjoy your holiday.
  • Try to avoid coming on the last weekend of April which is still on Vietnamese national holiday. It tends to be super crowded at this time, and the price will raise up (not just a bit).
  • Halong Bay weather in May may bring storms. Make sure to check with your cruise director if bad weather is on the forecast.
  • Don’t forget to bring Swimsuit and Sun cream to enjoy plenty of time under the water.

3. From JUNE to SEPTEMBER – Let’s enjoy Summer Fun in Halong Bay

halong bay weather from june to september
Overall weather: Hot, humid, frequent storms

Weather breakdown:

  • Temperature: Average summer temperatures are 29 celsius degree, which is significantly higher than the annual average of 23.7.
  • Rainfall: This season is considered to be rainy season; these four months account for 80-85% of Halong’s entire annual rainfall. August tends to be the wettest month, with an average of 14-16 days experiencing 265 mm of rainfall.
  • Sunlight: The summer months bring an average of 7 hours of full sunlight each day (August is the lowest of the year: only 6 hours).
  • Humidity: Due to the stormy weather and frequent rains, the summer months are the most humid of the year with highs of 90%.

Tourist season: low season

Tips:

  • If you don’t mind the hot weather, the summer months are a great time to visit as they are considered to be “low season”, so you can often avail of significant discounts from some cruises.
  • If you are visiting during the summer months, be aware of the storms. The Southwest monsoon comes along in summer, which has been known to bring wind speeds reaching up to 160 km/hr. Keep an eye on the forecast before making a booking, and make sure to ask your cruise company about it before you set off.
  • Only pack light clothes and of course – don’t forget your swimsuit and sun cream. This season is perfect for swimming and kayaking!
halong bay weather - swimming in summer
halong bay weather for kayaking
  • It’s better to bring some sort of light rain jacket in case that you could get caught in a shower when you’re out off the boat.

4. From OCTOBER to DECEMBER – High Peak Season

halong bay weather from October to December

Overall weather: Warm, less humid and rain, sporadic storms

Weather breakdown:

  • Temperature: Averages of 22 celsius degree (October is the warmest at 25, and December the coolest at 19).
  • Rainfall: Coming out of the stormy summer months, Autumn generally brings a break in the clouds. However, it seems like to start being drier with an average of 29.7 mm of rainfall. .
  • Sunlight: A seasonal average of 7.7 hours of direct sunlight each day.
  • Humidity: Humidity levels drop significantly as we move away from summer and shift into winter mode, with averages around 75%.

Tourist season: lead up to high season

Tips:

  • Squid fishing season in Halong Bay runs from April until December. At the beginning of the season the squid will be smaller, so the biggest catches usually come between September and December. If you visit Halong Bay during this time of year, you’ll have the chance to get in one of the squid fishing workshops offered by many of the cruises.
night squid fishing in Halong Bay
Night squid fishing in Halong Bay
  • Consider bringing a cardigan and a jacket with you, just in case some of those chilly December days turn up while you’re there.
  • Pack swimsuit and sun cream! Even if the air feels cool, the sun is still very strong and it’s easy to get skin burned if you aren’t careful.
halong bay weather and best time to visit halong bay
  • We also recommend bringing a jumper or light rain jacket in case a shower blows through.

5. Which month is cheapest to Fly to Hanoi City?

Peak Season: Summer time beckons tourists from around the world to bask in the sun and sweat with the locals between June and August. Outside of those roasting months though, January offers the celebration of Tet (lunar new year) that dresses the city in a guise of elegance, spirit and parties.

Off-peak Season: Because the city can be considered a year – round location, you can always find cheap flights to Hanoi, depending on your weather preferences. Fewer Tourists seek it out in the winter (except for Tet, in January), and March’s drizzle and chill leave most travelers yearning for the comforts of the indoors.

Credit: Away Lands

However, every season has its distinct charm and advantage. We hope with the guide, we can help you figure it out when is the best time for you to explore our amazing city – Halong Bay. In case you have any concern or problem, don’t hesitate to inbox and let us know.
And if you like our blog and consider it’s useful, please help us to share it. By this way, we can help more and more people answer their tough question also!
 
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