Great British Clean

18 to 27 September

The Great British Beach Clean is a week-long citizen science event taking place between Friday 18th - Sunday 27th September 2026, where hundreds of beach cleans take place up and down the UK.

With the help of supporters, the Marine Conservation Society are working to clean up beaches all around the UK and Northern Ireland. Every year in September, they run their flagship Great British Beach Clean event to encourage people to get involved.

Find out more here!

Location: All Wales

Dates: 18 September 2026, 19 September 2026, 20 September 2026, 21 September 2026, 22 September 2026, 23 September 2026, 24 September 2026, 25 September 2026, 26 September 2026, 27 September 2026