Danny Jones told fans: “We promised the best night ever and when we make promises we don't break promises.
"We only have one night to make that come true!”
Fans enjoyed their explosive performance as Danny and band mates Tom Fletcher, Dougie Poynter and Harry Judd hit the Yorkshire coast.
The 90-minute set featured hits from their latest album Power To Play, including Land Of The Bees and Honey I’m Home, as well as classic fan favourites such as Star Girls, Obviously, Shine A Light, Red and Five Colours In Her Hair.
Rising star Devon kicked off the night before acclaimed rockers Twin Atlantic stormed the stage.
The OAT season continues next Saturday July 19 with Craig David presents TS5 plus Patrick Nazemi.
5. McFly at Scarborough Open Air Theatre
Warm-up act Devon performing on Saturday night. photo: Cuffe & Taylor Photo: submitted
6. McFly at Scarborough Open Air Theatre
McFly fans having a fantastic night at the OAT. photo: Cuffe & Taylor Photo: submitted
7. McFly at Scarborough Open Air Theatre
A great view of the stage from the top of the seated area. photo: Cuffe & Taylor Photo: submitted
8. McFly at Scarborough Open Air Theatre
Devon opens for McFly. photo: Cuffe & Taylor Photo: submitted