Despite not being one of the favourites to lift the trophy on October 7, Clarke believes that George Bailey will captain a side full of potential.
The 31-year-old said: "I think we can win the Twenty20 World Cup for sure.
"We've got the talent and I think we showed that in our last game against Pakistan in the UAE.
"We've showed it in patches over the last couple of years and we made the final the last time around, and I hope we can go one better."
Australia's first match of the tournament will be against Ireland on September 19, in Colombo.