Swansea weather in June 2025

Expect 18°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Swansea in June. Check more long-term weather averages for Swansea in June before you book your next holiday to Wales in 2025/2026.

  • 18°C maximum daytime temperature in June in Swansea18
    18°C max day temperature
  • 7 hours of sunshine per day
  • 15 days with some rainfall in June in Swansea15
    15 days with some rainfall
  • 11°C minimum night-time temperature in June in Swansea11
    11°C min night temperature
  • 17 hours of daylight per day in June in Swansea17
    17 hours of daylight per day
  • No heat & humidity in June in Swansea0
    No heat & humidity
  • 78 mm monthly rainfall in June in Swansea78
    78 mm of monthly rainfall
  • UV (maximum) index 6 (High) in June in Swansea6
    6 (High) UV index
  • 14°C sea temperature in June in Swansea14
    14°C sea temperature

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The June weather guide for Wales (Swansea) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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More about Wales

How hot is it in Swansea in June?

Daytime temperatures usually reach 18°C in Swansea in June, falling to 11°C at night.

How sunny is it in Swansea in June?

There are normally 7 hours of bright sunshine each day in Swansea in June - that's 40% of daylight hours.

How warm is the sea around Swansea in June?

The average sea temperature around Swansea in June is 14°C.

Does it rain in Swansea in June?

There are usually 15 days with some rain in Swansea in June and the average monthly rainfall is 78mm.

Swansea June sunrise & sunset times

Browse the sunrise and sunset times for Swansea in June 2025. Select a month to view Swansea sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Sunday, 1st June 2025 04:04 20:24
Sunday, 15th June 2025 03:57 20:35
Monday, 30th June 2025 04:02 20:37

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