Sunny Summer is a special extended play (EP) by South Korean girl group GFriend. The album is marketed as their first special "summer" EP. It was released by Source Music on July 19, 2018, and distributed by kakao M (formerly LOEN Entertainment).
The album contains five songs, including the eponymous title track, "Sunny Summer," described by Billboard as having "airy, exuberant vocals that bounce along over the melody, [the song] is driven by the group's refreshing vocals tones as they sing about having a memorable summer together."