The concerts will support her coming album, 30, which is set for release on November 19. The album is about her divorce from American charity executive Simon Konecki, according to the singer.
Of the album, Adele says she wrote it as she “painstakingly rebuilt my house and my heart” and “this album narrates it”.
“I was certainly nowhere near where I’d hoped to be when I first started  nearly three years ago. Quite the opposite actually. I rely on routine and consistency to feel safe, I always have. And yet there I was knowingly – willingly even – throwing myself into a maze of absolute mess and inner turmoil.”
Adele last released music in 2015, with the album 25, which included singles Hello, When We Were Young, Send My Love (To Your New Lover) and Water Under the Bridge. Adele described 25 as a "make-up" album, a contrast to her previous releases about heartbreak.