Favre resides in Mississippi during the off-season. He was originally scheduled to have the surgery on Jan. 1, but decided to wait.
Packers coach Mike McCarthy said on Friday that Favre will have the surgery within the next two weeks and be ready for the team's first full-squad minicamp on May 20.
Favre said during the season that his sore ankle dates back to 1995. He has thought about the surgery since 1999, according to his wife, Deanna, but never went through with the procedure, which is expected to relieve chronic pain and improve his mobility.