The most comfortable time to visit Hạ Long is from late November to mid March. For sun, aim for late October to early November; for walking, go from December to early February.
When to go five ratings · thirty-six ten-day sections · click a cell to read it
For sun, go from late October to early November. It peaks in early November, at 61. That is a short window, about three weeks a year. Avoid June to early August for this: it falls to 8, mostly because it is too hot. The clearest skies come in September, when the sky is typically 65% covered at midday (often cloudy).
The being outside season here runs from late November to mid March. It peaks in early December, at 76. The weakest stretch is from late May to September, when it drops to 0, mostly because it is too hot.
For walking, go from December to early February. It peaks in mid January, at 67. Avoid late April to early October for this: it falls to 0, mostly because it is too warm.
The year, measured
The average temperature in Hạ Long over the whole year is 24°C. June is the hottest month, with highs of about 32°C; January is the coldest, with lows of about 16°C. The rainy (wet) season in Hạ Long runs from May to October, peaking in August with a 62% chance of rain on a given day. The dry season is November to April; December is the driest month, at 24%. Winds in Hạ Long are highest in May, averaging 2.7 m/s (10 km/h), and lightest in March, at 2.2 m/s (8 km/h). The prevailing wind is from the E. The clearest skies in Hạ Long come in September, when the sky is typically 59% covered; March is the cloudiest month, at 86%.
Month by month Hạ Long climate by month: average temperatures year round · click a month to read it
| Month | High | Low | Feels like | Chance of rain | Cloud | Wind | Being outside | Sun | Walking |
|---|---|---|---|---|---|---|---|---|---|
| January | 20°C | 16°C | 19°C | 26% | 79% | 2.3 m/s | 71 | 16 | 62 |
| February | 20°C | 17°C | 20°C | 25% | 84% | 2.3 m/s | 69 | 21 | 55 |
| March | 23°C | 20°C | 25°C | 25% | 86% | 2.2 m/s | 63 | 41 | 31 |
| April | 26°C | 23°C | 29°C | 32% | 82% | 2.4 m/s | 30 | 47 | 11 |
| May | 30°C | 26°C | 34°C | 46% | 70% | 2.7 m/s | 7 | 29 | 1 |
| June | 32°C | 28°C | 37°C | 58% | 64% | 2.7 m/s | 1 | 10 | 0 |
| July | 32°C | 28°C | 37°C | 57% | 63% | 2.5 m/s | 0 | 9 | 0 |
| August | 31°C | 27°C | 37°C | 62% | 64% | 2.3 m/s | 1 | 14 | 0 |
| September | 31°C | 26°C | 35°C | 59% | 59% | 2.2 m/s | 3 | 20 | 0 |
| October | 28°C | 23°C | 30°C | 45% | 61% | 2.6 m/s | 25 | 48 | 8 |
| November | 26°C | 21°C | 27°C | 31% | 63% | 2.3 m/s | 44 | 53 | 19 |
| December | 21°C | 16°C | 21°C | 24% | 72% | 2.4 m/s | 71 | 20 | 60 |
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Hạ Long weather by season
Year round, Hạ Long has days of about 20°C at their warmest in January, its coolest month, and 32°C in June, its warmest; the coolest hours of the day run from 16°C to 28°C through the year, and the average temperature over the year is 24°C around the clock. Rain is most likely around August and least likely around December. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Hạ Long weather in winterDecember to February
Winter in Hạ Long has typical daily highs of about 20°C and lows of about 16°C, with a 25% chance of rain on a given day.
Hạ Long weather in springMarch to May
Spring in Hạ Long has typical daily highs of about 26°C and lows of about 23°C, with a 34% chance of rain on a given day.
Hạ Long weather in summerJune to August
Summer in Hạ Long has typical daily highs of about 32°C and lows of about 28°C, with a 59% chance of rain on a given day.
Hạ Long weather in autumnSeptember to November
Autumn in Hạ Long has typical daily highs of about 28°C and lows of about 23°C, with a 45% chance of rain on a given day.
When is the rainy season in Hạ Long?
The rainy (wet) season in Hạ Long runs from May to October, peaking in August with a 62% chance of rain on a given day. The dry season is November to April; December is the driest month, at 24%.
What time of year is Hạ Long windiest?
Winds in Hạ Long are highest in May, averaging 2.7 m/s (10 km/h), and lightest in March, at 2.2 m/s (8 km/h). The prevailing wind is from the E.
What is the average temperature in Hạ Long year round?
The average temperature in Hạ Long over the whole year is 24°C. June is the hottest month, with highs of about 32°C; January is the coldest, with lows of about 16°C.
Where to go instead in early July, the weakest time here for being outside
How this is worked out
Every figure is a decade of weather-station observations blended into one typical year, in ten-day sections. The ratings, the chart and the feels-like column are read at midday local solar time. Being outside is the Easy outdoors rating, Sun is Sunbathing and Walking is Active outdoors, each out of 100: Good from 55, Ideal from 80. They describe what a time of year is usually like here, not a forecast. The dotted links open the map at that time of year; set its time of day to midday to see these numbers.