Weather in Swansea in June

A good month. June works. It is not the peak, but nothing about it fights you. Highs average 17.4 °C, lows 12 °C, and rain falls on 13 days — nothing in the month is working against you.

June ranks 3 of 12 in Swansea. Only July scores clearly higher, and the difference is small enough to be settled by price rather than weather.

Rain on 13 days, 2 of them heavy. Enough to need a plan B, not enough to need a plan around it. Pack for 17.4 °C days and 12 °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: the day barely swings — 5.4 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest June day reached 25.8 °C and the coldest night fell to 7.5 °C, and the wettest single day dropped 36 mm — roughly 47% of the month's rain in one day.

June is moderately variable: 22 mm in the driest year against 164 mm in the wettest, around an average of 77 mm. Roughly two Junes in three land near that average, and the third does something else entirely.

Wind is light at 13.1 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 84%, high enough to notice on the warm days without dominating them.

How June sits in the year

The month is on the way up: 2.6 °C warmer than May, and July adds another 1.6 °C. Late in the month feels noticeably different from the start of it, which is worth knowing if the trip is short.

Daylight in June

June is at or near the longest days of Swansea's year: 16.6 hours of daylight, holding steady all month. Evenings are the real gain — dinner outdoors still happens in full light.

An inland climate

Despite being inland, the year stays fairly even: 14.8 °C between the year's warmest afternoons and coldest nights.

How busy it gets

Peak season. Expect the highest prices of the year and to be booking well ahead.

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

June in Swansea versus nearby

If Swansea is one option among several, the nearby comparison is worth making. Birmingham is close enough to be a coin toss — within a degree on temperature, the same number of rain days. Manchester is close enough to be a coin toss — within a degree on temperature, 2 days more rain.

So: June is effectively as good as it gets here — 2 points behind July, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Swansea

See all twelve months in Swansea, or where else to go in June.