On 1 February, "Lewis", along with , and , formed Task Unit 50.7.2, an anti-submarine reserve unit assigned to the Logistics Support Force for the invasion of Iwo Jima. The destroyer escorts also provided screening services for Task Force 58 during air strikes against Japan in mid-February. The same task unit left Ulithi on 21 March for the Okinawa operation, screening Task Group 50.8 at sea in between escort and replenishment trips to Ulithi and Guam. During these operations "Lewis" was caught in the heavy typhoon of 2 June, at one point heeling over to 67 degrees. "Lewis" continued screening operations until 2 July when she was assigned to the Ulithi Surface Patrol and Escort Group, which was responsible for radar and anti-submarine services at Ulithi and providing escort services to periodic Okinawa-bound convoys.