When "Sigourney" was released from the Mariana Islands campaign, she sailed for Purvis Bay, Solomon Islands, arriving on 25 August. There, she was attached to TF 32 which sortied on 8 September for the Palau Islands operation. From 15 to 30 September, the destroyer worked in conjunction with the aircraft carriers which launched attacks in support of the amphibious assault on Peleliu. "Sigourney" was in Seeadler Harbor, Admiralty Islands, from 3 to 12 October. Then she got underway for Leyte, Philippines, with TG 77.2, the Bombardment and Fire Support Group.