While a summer-themed game mode named Beach Blast is also planned from xingwang's blog

The developer describes the new map as its "sunniest map to date," saying "Salty Shores should keep the summertime vibes going year-round as a permanent addition to all online Playlists!" While a summer-themed game mode named Beach Blast is also planned, the studio is keeping details quiet for now. Possibly beach volleyball-based, the mode is set to  Crates Rocket League launch on June 11 and run through July 2.

Meanwhile, the new Battle-Car that the update has in its innards, Twinzer, will only be available through the Impact Crate that Salty Shores will be introducing. Psyonix has confirmed that Twinzer will use the popular Battle-Car Octane's hitbox.

Developer Psyonix has released their Summer 2018 roadmap for all the upcoming content coming to Rocket League over the next few months. As detailed on the game’s official blog, the Summer 2018 season starts later this month to coincide with the start of competitive PvP Season 8. Players can expect to receive their Season 7 rewards as well as a brand new arena, new in-game music, a new summer-themed event in June, and new licensed DLC packs.