Australia's all-time top scorer with 69 goals in 128 appearances, Kerr suffered the ACL injury during training with Chelsea in January and missed the Paris Olympics.
She also missed the 2012 London Games due to a similar injury.
"I'm not putting a date on my return, just making sure I get it right and making sure I feel good before I get back on the pitch," Kerr told Optus Sport in an interview published on Monday.
"I mean, it's my second ACL, so I know you need to take the time, you need to make sure it's right and I'm doing everything I can. But definitely no rush for me, I want to make sure I can play for many more years to come."
Kerr, who turns 31 on Tuesday, has signed a contract extension until 2026 with the Women's Super League (WSL) champions.
Since joining Chelsea in the 2019-20 season, Kerr has won five WSL titles, three FA Cups and two League Cups. She also helped them reach the Women's Champions League finals in the 2020-21 season.
Chelsea embark on a fresh start this season under French coach Sonia Bompastor after 12 years under former manager Emma Hayes.
Kerr said their main focus will be to win the Women's Champions League after losing in the semi-finals last season.
"We've fallen short a few years in a row, and hopefully Sonia brings that to this club," she added.
