Harewood has started just one Premier League game for Villa since his £4million move from West Ham in 2007.
Chris Hughton says and sees the striker as a replacement for Shola Ameobi, who is sidelined by a broken foot.
Newcastle also have an interest in Wolves striker Sam Vokes, the youngster who snubbed the Toon two years ago to sign for the Midlands club.
But Wolves are not expected to agree to any deal.