Duncan, converted to a radar picket destroyer during her post-shakedown overhaul, sailed from Norfolk on 2 June 1945 for the Pacific, and after touching at San Diego and Pearl Harbor, joined Cabot (CVL-28) for screening and plane guard duty during the strikes on Wake Island of 1 August. After calling at Eniwetok, she continued to Okinawa to join the 7th Fleet for patrol duty off the Chinese and Korean coasts during the landing of occupation troops at Tsingtao, Taku, and Incheon. Duncan served in the Far East on occupation duty until 25 March 1946 when she sailed for the west coast, arriving at San Diego on 28 April.