The cruiser departed Sydney on 26 August in the company of twelve other ships from Task Forces 74 and 75; the combined force reached Seeadler Harbour on 1 September. Collins reembarked on 3 September, and "Australia" was assigned to the Morotai landings as lead ship of Task Group 75.2, part of the escort and bombardment force. The cruiser shelled the area around the landing site on Cape Gila from 06:50 to 07:40 on 15 September; this was cut short by ten minutes, as shell fragments from "Australia" were reported as falling close to the destroyer , which was positioned to cover the landings from the other side of the cape. The cruiser remained on station to provide fire support until the evening of 16 September, when "Australia" and the other ships normally assigned to Task Force 74 were permitted to withdraw to Mios Woendi. "Australia" remained there until 27 September, when Task Forces 74 and 75 sailed for Manus Island, where they were involved in exercising. During this time, the cruiser was visited by British Admiral of the Fleet Lord Roger Keyes.