Returning to Port Purvis 27 March 1944, "Cony" patrolled along the southwest coast of Bougainville, hunting Japanese barges and submarines, and giving fire support to troops ashore in the Empress Augusta Bay area. She sailed from Port Purvis 4 May for Majuro and Pearl Harbor, where she joined the screen of a transport group bound for Eniwetok and the Saipan landings on 15 June. "Cony" screened the transports as they unloaded and carried out antisubmarine patrol until 14 July, when she sailed to replenish at Eniwetok. Six days later she sailed for preinvasion bombardment on Tinian, remaining to patrol in the antisubmarine screen when the landings on Tinian began on 24 July.