Long-serving defender set to quit Newcastle
The Newcastle United defender had a spell on loan at the Championship club late last year.
But Williamson, signed six years ago from Portsmouth, was recalled amid an injury crisis at St James's Park.
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Hide AdThe 32-year-old then succumbed to an injury himself, but he is now ready to head back to Wolves on a permanent deal.
Williamson impressed in his five loan appearances for Kenny Jackett's side.
Speaking about his time at Wolves, Williamson said: "My time at Wolves was fantastic.
"It was a good opportunity and it was a very good fit.
“I was really enjoying myself, it is a great club, players are very good – a real togetherness, and I like the manager who was fantastic – to work with him and learn from him."