Haiphong is warmest in July, averaging 31° by day and 27° at night. The wettest month is August with 415 mm, and the year brings about 2114 mm in total.
Month by month
| Month | High | Low | Rain | Sea | Daylight | Good for |
|---|---|---|---|---|---|---|
| January | 21° | 12° | 56 mm | 19° | 10.9 h | Sightseeing |
| February | 22° | 14° | 67 mm | 19° | 11.3 h | Sightseeing |
| March | 25° | 17° | 62 mm | 20° | 11.9 h | Beach weather |
| April | 28° | 21° | 81 mm | 24° | 12.5 h | Beach weather |
| May | 30° | 25° | 205 mm | 28° | 13.0 h | Rainy season |
| June | 31° | 27° | 318 mm | 30° | 13.3 h | Rainy season |
| July | 31° | 27° | 267 mm | 31° | 13.2 h | Rainy season |
| August | 31° | 26° | 415 mm | 30° | 12.7 h | Rainy season |
| September | 30° | 25° | 399 mm | 30° | 12.1 h | Rainy season |
| October | 27° | 22° | 208 mm | 28° | 11.5 h | Rainy season |
| November | 26° | 18° | 30 mm | 25° | 11.0 h | Beach weather |
| December | 21° | 13° | 6 mm | 21° | 10.7 h | Sightseeing |
High and low are average daily maximum and minimum, rain is typical monthly total, sea is the average surface temperature, daylight is the hours between sunrise and sunset mid-month. Climate normals from NASA POWER and NOAA MUR — averages, not promises.
When to go
Beach weather: March, April and November — highs around 26°, nights no colder than 17°, and at most 81 mm of rain in a month. The sea sits at 20–25° then.
Walking the city: January, February and December — highs of 21–22° and no more than 67 mm of rain a month.
Wet season: May, June, July, August, September and October — up to 415 mm in a single month.