Weather in Busan in April

A good month. April is a solid month to be in Busan. Highs average 16.8 °C, lows 8.9 °C, and rain falls on 8 days — nothing in the month is working against you.

April ranks 6 of 12 in Busan: past the worst of the year but short of October, which is the month to book if the dates are open.

The rain arrives in bursts — 4 of the 8 wet days are heavy ones. Mornings tend to hold; build the outdoor half of each day before lunch and keep the afternoon flexible. Pack for 16.8 °C days and 8.9 °C nights; the spread matters more here than any single number.

What the averages hide

The averages here are honest — no hidden extremes worth planning around. Across the twenty years measured, the hottest April day reached 23.7 °C and the coldest night fell to 1.3 °C, and the wettest single day dropped 86 mm — roughly 63% of the month's rain in one day.

April is moderately variable: 42 mm in the driest year against 254 mm in the wettest, around an average of 137 mm. Roughly two Aprils in three land near that average, and the third does something else entirely.

Wind is light at 13.3 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 75%, high enough to notice on the warm days without dominating them.

How April sits in the year

The month is on the way up: 4.5 °C warmer than March, and May adds another 4.3 °C. Late in the month feels noticeably different from the start of it, which is worth knowing if the trip is short.

Daylight in April

13 hours of daylight, gaining 1 hours across the month. That is between Busan's extremes of 14.5 and 9.8 hours, so days are long enough not to constrain the plan.

Sea temperature

The sea sits at about 15 °C in April — cold — a quick dip rather than a swim, and a wetsuit if you are in for longer. The sea peaks at 26.9 °C in August and bottoms out at 13.9 °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.

April in Busan versus nearby

If Busan is one option among several, the nearby comparison is worth making. Daegu is close enough to be a coin toss — 2 °C warmer, the same number of rain days. Gwangju is close enough to be a coin toss — within a degree on temperature, the same number of rain days.

So: April works, with October the better month by 18 points if the dates can move. If they cannot, nothing here should stop you booking.

Every month in Busan

See all twelve months in Busan, or where else to go in April.