As the clock ticked down on Tyneside, new boss Matthias Jaissle secured a £51M deal for Matias Fernandez-Pardo from Lille, as Woltemade headed to Turin.
The 24-year-old struggled for consistency following his move to St James’ Park from Stuttgart in a club record £69M switch last summer.
Despite a strong start to life in English football, Woltemade ended the campaign with just 11 goals and four assists across 51 games.
The deal is understood to be a straight loan, with no future transfer option or obligation included, and Juventus will pay a £3.5M fee.
Jaissle admitted it was a delicate decision to let Woltemade go, but he hinted at his fellow German still having a future at the club in 2027.
"I really appreciate Nick as a player for his quality on and off the pitch. We had always good conversations, really honest conversations and he decided now to take another challenge in a top league with a top club.
"We will monitor him closely. I'm really curious how he's doing and I'm sure he will score a lot of goals there for sure. He's still our player, so we will stay in close contact."