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The best time to visit Ha Long Bay
March, April, September and October — daytime highs around 27°C. Every number on this page is measured, not guessed.
Ha Long Bay month by month
| Month | Day | Night | Wet days | |
|---|---|---|---|---|
| January | 20°C | 14°C | 9 | |
| February | 21°C | 15°C | 9 | Shoulder |
| March | 24°C | 18°C | 11 | Best |
| April | 27°C | 22°C | 14 | Best |
| May | 29°C | 25°C | 21 | Shoulder |
| June | 31°C | 27°C | 23 | |
| July | 31°C | 27°C | 25 | |
| August | 31°C | 26°C | 27 | Shoulder |
| September | 30°C | 25°C | 22 | Best |
| October | 28°C | 22°C | 12 | Best |
| November | 26°C | 20°C | 9 | Shoulder |
| December | 21°C | 15°C | 6 |
The short version
Warmest: June, around 31°C by day. Coolest: January, around 20°C by day and 14°C at night. Wettest: August with about 27 wet days. Driest: December with about 6.
If you want fewer people: February, May, August, November sit right beside the best months. The weather is close and the crowds are not.
Book it for those months
Prices climb as the good months fill up.
Common questions
When is the best time to visit Ha Long Bay?
The best months are March, April, September and October, when daytime highs sit around 27°C.
What is the hottest month in Ha Long Bay?
June, with daytime highs around 31°C.
What is the wettest month in Ha Long Bay?
August, with about 27 wet days. The driest is December with about 6.
When is the cheapest time to visit Ha Long Bay?
Prices follow the weather. The months either side of the best ones — February, May, August, November — are usually cheaper with similar conditions.
Temperatures and wet days are measured, not estimated: ERA5 reanalysis for 2021-2023, at Ha Long, Quảng Ninh. Source: Open-Meteo. Hotel and activity links are partner links — the price you pay is the same.