Weather in Haiphong in June

A hard month. June asks something of you. Go in knowing what. You should expect rain on 23 days of the month, which is more days wet than dry.

June ranks 11 of 12 — near the bottom of Haiphong's year. December is the month that works, and the swing between the two is 50 points, which is a different holiday rather than a slightly better one.

Rain on 23 of the month's 30 days, 7 of them heavy. At that frequency a wet-weather backup is not a contingency, it is the itinerary — book the indoor things first and treat the clear days as the bonus. Natural fibres and a second shirt for the day. At 86% nothing dries, including you.

What the averages hide

Averages flatten a month, and this one hides a few things: 25 days top 30 °C, making the heat continuous rather than occasional; the day barely swings — 4.3 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest June day reached 36.1 °C and the coldest night fell to 21.3 °C, and the wettest single day dropped 81 mm — roughly 38% of the month's rain in one day.

June is one of the reliable ones — rainfall has stayed between 139 mm and 328 mm across all twenty years, a narrow enough band that the 213 mm average is something you can plan against rather than merely quote.

Wind is light at 8.1 km/h, so the temperature on the page is close to the temperature on your skin, and humidity at 86% is the real story though — it is the number that decides how the day feels, not the 31.2 °C.

How June sits in the year

Temperatures hold steady either side: 30.8 °C in May, 31.2 here, 31.2 in July. Nothing about the timing within the month matters much. Rain has already shifted: 5 days more than May had.

Daylight in June

June is at or near the longest days of Haiphong's year: 13.4 hours of daylight, holding steady all month. Evenings are the real gain — dinner outdoors still happens in full light.

Sea temperature

The sea sits at about 29.4 °C in June — 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

Off season. The genuine off season: cheapest by a distance, with the caveat that some tours and restaurants close entirely.

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

June 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, 2 days less rain. Thanh Hóa is close enough to be a coin toss — within a degree on temperature, 5 days less rain.

So: June is a compromise. December is 50 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 June.