Now in its fourth year, the event will feature performances from local musicians as well as a variety of art and craft activities.
Local children will also take to the stage to perform in a ‘junk orchestra’, using instruments they have made from recycled items.
Entry to the festival is free, although donations to support the event are welcome.
Paul Knight, Head of Avenue Services, said: “Glastonvenny has been getting more and more popular each year and is always one of the highlights of the summer calendar here in Blacon.
“We’re looking forward to welcoming residents of all ages to the Adventure Playground for another fun-filled community occasion.”