Jarratt was born and grew up in Wongawilli, a small rural town near Wollongong, New South Wales and later in the Snowy Mountains area. Jarratt’s father was a coal miner and later a concreter, who worked on the Snowy Mountains hydroelectric scheme. His 5x great-grandfather, George Jarratt, born 1833, came from Croxton in Cambridgeshire, England; his son, John, married a Mary Kelly from Ireland. While in high school, Jarratt directed and acted in a school play which was a great success and led to
