Haiphong (Hai An) weather by month & the best time to visit
Vietnam · major coastal city · humid subtropical climate
The best time to visit Haiphong (Hai An) is February — its sunniest month (Sunshine Score 82/100), with December and January close behind. Haiphong (Hai An) averages about 1,414 hours of sunshine a year. Daytime highs around 22°C / 72°F and roughly 25 mm of rain in February.
When is the best time to visit Haiphong (Hai An)?
For sunshine, the best time to visit Haiphong (Hai An) is February, then December and January. The dullest month is May (59/100, 168 mm of rain). The full month-by-month picture is in the table below.
How sunny is Haiphong (Hai An)?
Haiphong (Hai An) isn't a sunny place by world standards: about 1,414 hours of sunshine a year. February (82/100) is noticeably better than May (59). It ranks #19 of 22 destinations in Vietnam for annual sunshine, below the national median of 2,124 hours. Rain has a clear season: the wettest stretch, around August, carries about 53% of the annual 1,645 mm.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 79 | 20° / 68°F | 13° / 55°F | 39 mm | 4 | 20° / 68°F |
| February | 82 | 22° / 72°F | 14° / 57°F | 25 mm | 5 | 20° / 68°F |
| March | 77 | 25° / 77°F | 17° / 63°F | 50 mm | 5 | 21° / 70°F |
| April | 74 | 28° / 82°F | 21° / 70°F | 69 mm | 6 | 27° / 81°F |
| May | 59 | 30° / 86°F | 25° / 77°F | 168 mm | 8 | 30° / 86°F |
| June | 59 | 31° / 88°F | 27° / 81°F | 213 mm | 9 | 32° / 90°F |
| July | 59 | 31° / 88°F | 27° / 81°F | 302 mm | 9 | 32° / 90°F |
| August | 59 | 31° / 88°F | 26° / 79°F | 338 mm | 8 | 32° / 90°F |
| September | 59 | 30° / 86°F | 25° / 77°F | 240 mm | 8 | 31° / 88°F |
| October | 64 | 28° / 82°F | 22° / 72°F | 122 mm | 7 | 29° / 84°F |
| November | 77 | 25° / 77°F | 18° / 64°F | 51 mm | 6 | 26° / 79°F |
| December | 81 | 21° / 70°F | 14° / 57°F | 28 mm | 4 | 22° / 72°F |
Sea temperature in Haiphong (Hai An) by month
The sea off Haiphong (Hai An) is warmest in June at around 32°C / 90°F, and coolest in January at 20°C / 68°F. The water sits at a comfortable 21°C or warmer roughly 10 months a year. Month-by-month sea-surface temperatures are in the Sea column of the table above.
Nearest destinations
Head-to-head
How Haiphong (Hai An) compares month by month: Haiphong (Hai An) vs Hanoi (Soc Son) · Haiphong (Hai An) vs Nanning (Jiangnan) · Haiphong (Hai An) vs Thanh Hóa · Haiphong (Hai An) vs Vinh · all comparisons
Haiphong (Hai An): questions and answers
What kind of destination is Haiphong (Hai An)?
Haiphong (Hai An) is a major coastal city in Vietnam with a humid subtropical climate — the sea reaches 32°C at its warmest and is swimmable (21°C+) about 10 months a year.
How many hours of sunshine does Haiphong (Hai An) get a year?
Haiphong (Hai An) gets about 1,414 hours of sunshine a year, at its best around February.
When is the best time to visit Haiphong (Hai An)?
The sunniest time to visit Haiphong (Hai An) is February, when the Sunshine Score peaks at 82/100 (with December and January close behind). Expect daytime highs around 22°C / 72°F.
What is the least sunny month in Haiphong (Hai An)?
May is the least sunny month in Haiphong (Hai An), scoring 59/100 with about 168 mm of rain.
What is the sea temperature in Haiphong (Hai An)?
The sea in Haiphong (Hai An) ranges from about 20°C (January) to 32°C (June). Month-by-month sea temperatures are on this page.
How strong is the sun in Haiphong (Hai An)?
The typical midday UV index in Haiphong (Hai An) peaks around 9 (very high) in June, easing to about 4 (moderate) in January. Month-by-month midday UV values are in the UV column of the table on this page.
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