"Karmichael's going to be out for six to eight weeks", Australia head coach Michael Cheika said.
Hunt, who played rugby league for Australia and had a stint in the Australian rules Australian Football League before converting to rugby union, made his test debut for the Wallabies last month and was one of the best players in a June series against Fiji, Italy and Scotland.
The Wallabies will depart for South Africa in eight weeks time and Hunt will be eyeing off that two-match tour in Bloemfontein and Mendoza against the Springboks and Pumas.
"He's very disappointed but there's nothing you can do about it when the injury happens, you've got to get on with it".
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Cheika hasn't replaced Hunt in his Wallabies squad.
"We're just taking the precautions to get him back into the right condition and I'd say after this week he'll be back in full training".
THE Wallabies have suffered an injury blow with Karmichael Hunt ruled out of the Bledisloe Cup Tests in August - but Quade Cooper still has not been recalled to the squad.
Cheika is putting an emphasis on physical and mental conditioning in the next couple of weeks in preparation for the games against New Zealand he predicts will be the most intense his players will experience.