Weather in Haiphong in March

Prime time. March is about as good as Haiphong gets. Highs average 25.3 °C, lows 17.9 °C, and rain falls on 10 days — nothing in the month is working against you.

March ranks 5 of 12 in Haiphong: past the worst of the year but short of December, which is the month to book if the dates are open.

Rain on 10 days, 1 of them heavy. Enough to need a plan B, not enough to need a plan around it. Nothing specialised needed — this is the month you pack for the trip rather than for the weather.

What the averages hide

The averages here are honest — no hidden extremes worth planning around. Across the twenty years measured, the hottest March day reached 32.7 °C and the coldest night fell to 8.2 °C, and the wettest single day dropped 45 mm — roughly 90% of the month's rain in one day.

March is moderately variable: 6 mm in the driest year against 119 mm in the wettest, around an average of 50 mm. Roughly two Marchs in three land near that average, and the third does something else entirely.

Wind is light at 8.9 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 82%, high enough to notice on the warm days without dominating them.

How March sits in the year

The month is on the way up: 2.6 °C warmer than February, and April adds another 3.4 °C. Late in the month feels noticeably different from the start of it, which is worth knowing if the trip is short.

Daylight in March

12 hours of daylight, gaining 0.6 hours across the month. That is between Haiphong's extremes of 13.4 and 10.9 hours, so days are long enough not to constrain the plan.

Sea temperature

The sea sits at about 21.3 °C in March — comfortable for a proper swim. The sea peaks at 29.9 °C in August and bottoms out at 20.4 °C — water lags the air by a month or two, which is why the best swimming often comes after the best weather.

How busy it gets

Busy. Popular without being frantic; book the things you care about, improvise the rest.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

March in Haiphong versus nearby

If Haiphong is one option among several, the nearby comparison is worth making. Hanoi is close enough to be a coin toss — 2.5 °C warmer, the same number of rain days. Thanh Hóa is close enough to be a coin toss — 2 °C warmer, 1 day less rain.

So: March works, with December the better month by 8 points if the dates can move. If they cannot, nothing here should stop you booking.

Every month in Haiphong

See all twelve months in Haiphong, or where else to go in March.