McLaren won the first and last race of 2012 but failed to win either world championship.
"The car was really quick in the last two races and I think we can look forward to some really strong performances next year", he told Sky Sports News.
"We have to make the normal gains you have to do over winter and Red Bull and Ferrari will be flat out doing that, as will the other teams trying to catch up - Lotus and Mercedes".
"But we're pretty confident we can do the right things over the winter and start off strong. We're going to Melbourne to win".
McLaren finished third in the world championship after reliability problems allowed Ferrari to leap ahead of them and finish second.
"It was a fantastic year for the team", he added.
"We obviously wanted to perform better in terms of end result and be there for the championship. But the car was strong at the end and we're really focused on 2013 now."
Michael added that the arrival of Sergio Perez from Sauber will keep the team busy.
"We've got a change to one of the drivers, so that's a big change for the team, and we're doing all the planning for that now. But also putting in place all the changes that we need to make sure that we're successful next year - and that means the whole lot."