The UKTV channel will air Syfy's remake of the BBC paranormal drama, which follows a ghost, a vampire and a werewolf living together in Boston.
Watch has acquired the rights to the 13-part first season, which stars Sam Huntington, Sam Witwer and Meaghan Rath.
"The US version of Being Human provides compelling viewing by offering a dark take on an ordinary flat share situation," said Steve Hornsey, General Manager for Watch.
"It is a perfect fit for Watch which puts a new twist on established genres and I am delighted it will premiere on the channel, giving our viewers access to more premium content ahead of other UK broadcasters."
The third season of Being Human is currently airing in the US on cable network Syfy.
Watch also recently picked up the UK transmission rights to US series Beauty and the Beast.
> Being Human season three return date, cast details announced by Syfy
Watch a trailer for Being Human US below: