He spent the 2007–08 season on loan at Championship side Southampton. Hammill hoped joining Southampton could benefit him for first team experience, as well as making a breakthrough. While in his first two months at Southampton, Hammill signed a three-year contract with his parent club, Liverpool, keeping him until 2011. Hammill made his Southampton debut, where he came on as a substitute for Jhon Viáfara, in the 63rd minute, in a 4–1 loss against Crystal Palace. By November, Hammill made two starts and came on from the substitute bench six times, and as a result he was sent to the reserves or remained on the substitute bench. Having regained his first team place, Hammill then provided two assists for the club, as Southampton beat Hull City 4– 0 on 8 December 2007. Throughout the season, Hammill remained in the first team spotlight at Southampton, as he made 28 appearances in total.