"Grant" operated in Manila Bay until 27 June, when she got underway for Balikpapan, Borneo. From 30 June to 9 July, the destroyer covered operations against Balikpapan. She was back at Manila on 14 July. "Grant" then moved to the Marshalls and, upon her arrival at Eniwetok on 3 August, joined TF 49 for duty in the North Pacific. She sailed to Adak, Alaska, and the day before she arrived there, received word of the Japanese capitulation on 15 August, and sortied with TF 49 for Ominato, Japan. The task force arrived off Honshu on 8 September and anchored at Ominato on the 10th.