Australia has secured a 3-0 clean sweep in their Twenty20 games against South Africa after a Travis Head onslaught inspired them to a five-wicket win in the series finale in Durban.

In reply to South Africa's 8-190 on Sunday at Kingsmead, Head thumped a career-high 91 off 48 balls to help lift Australia to victory with 13 balls to spare.

Josh Inglis (42 off 22 balls) and Marcus Stoinis (37* off 21) joined in on the fun, but Head was an unstoppable force for most of the innings.

Head, whose previous highest score in a T20I was 48 not out, cracked six sixes and eight fours in his blistering knock.

He was given a life on 55 when Temba Bavuma dropped a tough diving attempt.

Bavuma eventually got his man with a catch in the deep, but Australia only needed five more runs for victory by that stage.

Head had posted scores of just 18 and 6 in the first two matches, and his display on Sunday is an ominous warning for South Africa ahead of the upcoming five-match ODI series, starting on September 7.

"It's nice to be back and contributing," Head said.

"There's been limited opportunities in this format for a while. I'd been struggling a little bit to find my tempo and how I wanted to go about it at the top."

Mitch Marsh was named man-of-the-series after plundering 186 runs from 100 balls across his three innings in a stunning start to his reign as captain.

"I'm really proud of a pretty young group coming over here and winning the series 3-0," Marsh said.