Pacific War

Formoe arrived at Manus from the U.S. East Coast 15 January 1945, and ten days later sailed for Morotai to join a troop convoy bound with reinforcements for Lingayen. She entered Lingayen Gulf 10 February, and for the next month and a half operated in the Philippines, guarding minecraft and exploding the mines they swept in Baler Bay and Casiguran Sound, and sailing as escort from Lingayen to Leyte. From 21 to 30 March, Formoe patrolled off Panay in a picket line covering landings there, then continued her Philippine escort duty, making one voyage to Manus to bring landing craft north.

The escort departed Subic Bay 18 April 1945 to stage at Morotai for the invasion of Borneo. She arrived at Tarakan 1 May escorting the amphibious force, and from 3 to 30 May off Borneo, acting as headquarters ship for Captain Charles Gray, the officer commanding all naval activities at Tarakan. In addition to driving off several Japanese air attacks, she fired in four separate shore bombardments to support the troops advancing ashore. Between 2 June and the close of the war, Formoe ranged widely on escort duty, calling at Leyte, Hollandia, Ulithi, Manila, and Okinawa.

At Manila at the close of hostilities, she began occupation duty with a return voyage to Okinawa, then served as escort for the flagship of Fleet Air Wing 1 for most of the remainder of her career, calling at Shanghai and Hong Kong, as well as in Tokyo Bay. She returned to San Francisco, California, 20 January 1946, and was decommissioned and placed in reserve at San Diego, California, 27 May 1946.

Cold War

Recommissioned 27 June 1951, Formoe sailed from San Diego, California, 5 October 1951 for Newport, Rhode Island, her home port. For the next year she trained in New England and Caribbean waters, then served from October to December as training ship at the Fleet Sonar School, Key West, Florida. She had similar duty the next autumn, otherwise continuing her east coast and Caribbean operations until sailing from Newport 13 September 1954 to rejoin the U.S. Pacific Fleet.

From February through June 1955, and again from October 1955 to March 1956, Formoe carried out tours of duty in the Far East, taking part in hunter-killer operations and serving as station ship at Hong Kong.