Watson, 24, said he had begun fitness work following surgery on his dislocated left shoulder suffered in Australia's first Test victory over the West Indies in Brisbane a fortnight ago.
He admits he does not know when he will play again and that when he does it will take some time to regain confidence after damaging his shoulder while diving for the ball.
Watson said Australia's South African tour starting on February 24 with the first of six one-day internationals was his goal.
"It (the recovery) is looking like two to three months but I don't know exactly," he said on Tuesday.
"The doctor was happy with the way the surgery went. I'll be able to start doing things in the next four or five weeks skills-wise then build it up."
Australia, in the wake of the 2-1 Ashes series defeat, hope to groom Watson as an genuine all-rounder to rival England's Andrew Flintoff.
Watson has played three Tests and 40 one-day internationals.