Abraham was part of the England squad that lost the European U21 Championship semi-final to Germany last month, and spent last season on loan in the Sky Bet Championship with Bristol City. On the same day that he put pen to paper on a new five-year contract at Stamford Bridge, his temporary switch to the Swans was confirmed, as he teams up again with head coach Paul Clement.
It is normal practice for Chelsea's talented young players to sign contract extensions before departing on season-long loans.
Abraham said he had sought advice from Swansea defender Alfie Mawson, an England Under-21 team-mate in Poland, before committing himself to the club. Hopefully I can do the same at Swansea.
"I'm really excited. I enjoyed my time at Bristol City last season, playing regular first-team football and scoring goals".
Topeka forecast for coming days includes multiple chances of rain
A trailing disturbance could bring a few more showers or brief rumbles on Monday , but most of the day looks dry. Maybe a little lower rain chance on Sunday with more sunshine and afternoon readings rising into the lower 90s.
Swansea are also closing in on Las Palmas midfielder Roque Mesa, with the player set to undergo a medical on Wednesday.
The 19-year-old, an England U21 worldwide, has appended his signature to a five-year deal that will keep him at Stamford Bridge until June 30, 2022.
His arrival is likely to pave the way for Borja Baston to leave Swansea following his dismal first season in south Wales.
Abraham becomes Swansea's second summer signing after they completed the deal for former Heerenveen shot-stopper Erwin Mulder.