In addition to Sunderby SK, 124 other teams from 11 different countries played in Girls 15. They were divided into 31 different groups, whereof Sunderby SK could be found in Group 31 together with Tölö FF, Kongsvinger IL and Rödsle BK. Sunderby SK continued to Play off A after reaching 1:st place in Group 31. In the playoff they made it to 1/4 Final, but lost it against Bollstanäs SK 1 with 0-3. In the Final, LB07 won over Eskilstuna United DFF and became the winner of Play off A in Girls 15. Sunderby SK also participated in Girls 14 during Gothia Cup 2013. They reached the 1/16 Final in G14 Play off A, but lost it against Tingsryd United FC with 4-5.