After repairs, she joined Task Group 51 under Rear Admiral Harry W. Hill for an attack on Darrit, steaming for that island on 23 January and arriving 30 January. After shelling the island for 30 minutes, it was discovered no Japanese were ashore. She then moved to support operations on Eniwetok Atoll on 8 February, providing shore bombardment on Parry Island ahead of landings which took place on 19 February. She then screened carriers conducting airstrikes at Palau, Yap, Ulithi, and Woleai between 30 March and 1 April. She then joined with a carrier force assigned to cover the landings around Hollandia and Tanahmerah on New Guinea, which took place from 21 to 24 April. She steamed northward with the carrier force and struck Truk with five other cruisers and destroyers. "Portland" then bombarded Satawan in the Nomei Group. Following this series of operations, "Portland" returned to Mare Island for a more extensive overhaul, which was completed in August. She returned to the western Pacific for shore bombardments of Peleliu from 12 to 14 September. The cruiser supported the landing on Peleliu on 15 September, providing artillery to support the advance of Allied forces. She provided gunfire support at Peleliu through 29 September, and then steamed for Seeadler Harbor, Manus Island in the Admiralties.