There is an option for the deal to be made permanent at the end of the season and De Guzman is looking forward to having more game time with his new club.
He said: "I didn't get much game time when the new coach came in. It was a frustrating time for me. I just want to play football on a regular basis again.
"I am fortunate that I will be working under a good coach at Swansea who lets you be free and allows you to do what you do best.
"I like to attack as a midfielder, box to box, and hopefully I can add my share of goals along the way."