After the Casablanca landings, "Swanson" returned to Atlantic convoy duty until July 1943, when she joined the Sicily invasion force. She and were assigned as fire support ships for the landings at Licata, Sicily; but, on 10 July, the night before the landings, she collided with "Roe" while investigating suspicious radar contacts and went dead in the water with a flooded fire room; nevertheless, she was able to control further flooding, beat off an enemy attack, and retire to Malta for temporary repairs before proceeding home later in July to the Brooklyn Navy Yard.