Weather in Haiphong in October

A good month. October works. It is not the peak, but nothing about it fights you. Highs average 28.6 °C, lows 22.2 °C, and rain falls on 11 days — nothing in the month is working against you.

October ranks 7 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 11 days, 3 of them heavy. Enough to need a plan B, not enough to need a plan around it. Pack for 28.6 °C days and 22.2 °C nights; the spread matters more here than any single number.

What the averages hide

Averages flatten a month, and this one hides a few things: 8 days top 30 °C — hot spells arrive, but they break. Across the twenty years measured, the hottest October day reached 33.6 °C and the coldest night fell to 13.6 °C, and the wettest single day dropped 255 mm — roughly 209% of the month's rain in one day.

This is the volatile part. October rainfall has ranged from 10 mm to 536 mm across the twenty years measured — a 526 mm spread around an average of 122 mm. The average is real but almost no individual October looks like it, so treat the figure as the middle of a wide range rather than a forecast.

Wind is light at 8.8 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 80%, high enough to notice on the warm days without dominating them.

How October sits in the year

The month is on the way down: 2 °C cooler than September, with November dropping another 2.9 °C. The first week and the last are not the same trip. Rain has already shifted: 8 days fewer than September had.

Daylight in October

11.7 hours of daylight, losing 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 27.8 °C in October — warm enough that the water offers no relief from the heat. 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

Shoulder. The value months — prices ease off and you get the place closer to itself.

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

October 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 — within a degree on temperature, the same number of rain days. Thanh Hóa is the weaker option in October — within a degree on temperature, 4 days more rain.

So: October is a compromise. December is 20 points better and is what Haiphong is actually like at its best — worth moving the trip for if that is possible, and worth adjusting expectations for if it is not.

Every month in Haiphong

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