Ha Long Bay Weather
A month-by-month look at temperature, rainfall and what to pack in Ha Long Bay. The annual average is 26°C high / 20°C low — hottest in June (monsoon · cruise risk) (32°C) and coldest in January (cool + dry · low season) (13°C).
Ha Long Bay Weather at a Glance
As of 2026A quick summary of Ha Long Bay's year-round climate and the best time to visit.
- Annual average
- 26° / 20°
- Best time to visit
- April (peak spring · best month), October (peak autumn · second-best month), November (autumn shoulder · ideal)
- Hottest month
- June (monsoon · cruise risk) (32°C)
- Coldest month
- January (cool + dry · low season) (13°C)
- Wettest month
- August (peak typhoon · highest risk) (320mm)
- Driest month
- January (cool + dry · low season) (25mm)
As of 2026, Ha Long Bay's weather averages 26°C high / 20°C low across the year, and the best time to visit for stable temperatures, rainfall and crowds is April (peak spring · best month), October (peak autumn · second-best month), November (autumn shoulder · ideal). The hottest month is June (monsoon · cruise risk) (32°C), the coldest is January (cool + dry · low season) (13°C), and the wettest is August (peak typhoon · highest risk) (320mm).
Best Time to Visit Ha Long Bay
Ha Long Bay's best month — 20/26°C, clear skies, perfect for cruise photography + kayaking + cooking class outdoors. Hotels at peak rates as international + Vietnamese travelers arrive. Book cruises 2-3 months ahead. April 30-May 1 holidays bring big crowds + price spike.
Second-best month after April — 22/27°C, clear skies, low rainfall, perfect for cruise photography. Hotels return to peak rates. Book cruises 2-3 months ahead. The canonical October Ha Long Bay experience: misty mornings clearing into bright afternoons.
Excellent shoulder month — 19/24°C, low rainfall, clear skies most days. Slightly cooler than October but still pleasant. Hotels easing slightly from October peak. Best for travelers who want October weather without October prices.
Ha Long Bay Weather Month by Month
Tap any month for a detailed guide with what to wear, sunrise/sunset and air quality.
| Month | High/Low | Rain | Rainy days | Crowds | |
|---|---|---|---|---|---|
| January (cool + dry · low season) | 19° / 13° | 25mm | 8 | Moderate | Details → |
| February (cool · Tet possible) | 20° / 14° | 30mm | 10 | Moderate | Details → |
| March (warming up · shoulder begins) | 22° / 16° | 35mm | 11 | Busy | Details → |
| April (peak spring · best month) | 26° / 20° | 60mm | 12 | Very busy | Details → |
| May (early monsoon · transitional) | 30° / 23° | 175mm | 14 | Moderate | Details → |
| June (monsoon · cruise risk) | 32° / 26° | 250mm | 15 | Quiet | Details → |
| July (peak monsoon · avoid) | 32° / 26° | 290mm | 17 | Quiet | Details → |
| August (peak typhoon · highest risk) | 31° / 26° | 320mm | 18 | Quiet | Details → |
| September (typhoon tail · improving late) | 30° / 24° | 240mm | 14 | Quiet | Details → |
| October (peak autumn · second-best month) | 27° / 22° | 100mm | 8 | Very busy | Details → |
| November (autumn shoulder · ideal) | 24° / 19° | 50mm | 6 | Busy | Details → |
| December (cool dry · holiday season) | 21° / 15° | 25mm | 6 | Moderate | Details → |
What to Wear in Ha Long Bay by Season
T-shirts + shorts daytime, light jacket evenings. Swimwear for kayaking + Ti Top beach.
Lightest fabrics + rain gear. Sun hat + SPF 50+ for sunny spells.
T-shirts + light layers. Long pants for evenings. Light rain shell occasional.
Light jacket + layers. Slightly warmer than January but still cool over water.
Ha Long Bay Weather FAQ
What is the best time to visit Ha Long Bay? +
For weather, April (peak spring · best month), October (peak autumn · second-best month), November (autumn shoulder · ideal) are the most comfortable months. Highs sit around 26°C with relatively stable rainfall and crowds.
What are the hottest and coldest months in Ha Long Bay? +
The hottest month is June (monsoon · cruise risk) with an average high of 32°C, and the coldest is January (cool + dry · low season) with an average low of 13°C. The annual average is 26°C high / 20°C low.
When does it rain most in Ha Long Bay? +
The wettest month is August (peak typhoon · highest risk) (320mm over about 18 rainy days) and the driest is January (cool + dry · low season) (25mm). Total annual rainfall is roughly 1600mm.
What should I pack for Ha Long Bay? +
Spring (Mar–May) averages 26/20°C — T-shirts + shorts daytime, light jacket evenings. Swimwear for kayaking + Ti Top beach. Summer (Jun–Aug) averages 32/26°C — Lightest fabrics + rain gear. Sun hat + SPF 50+ for sunny spells. Autumn (Sep–Nov) averages 27/22°C — T-shirts + light layers. Long pants for evenings. Light rain shell occasional. Winter (Dec–Feb) averages 20/14°C — Light jacket + layers. Slightly warmer than January but still cool over water.
What is the weather in Ha Long Bay this month (June (monsoon · cruise risk))? +
June (monsoon · cruise risk) averages 32°C high / 26°C low with 250mm rainfall over about 15 rainy days. Crowds are quiet and prices are low.
Keep Planning Your Ha Long Bay Trip
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.