Castle Field, adjacent to Southsea Castle part of the Southsea Common area, is often used to host concerts and events taking place in Southsea, such as the Race For Life, Victorious, Fetes and other shows.

Castle Field was part of the defences of Southsea Castle, having a large open area surrounding the castle provided the castle defenders with a field of fire, any attcking forces were forced to approach across this open ground at the mercy of the castle archers or artillery.

The banked section at the coastal end of Castle Field, known as East Battery, is an earthwork battery where artillery was positioned, to protect the castle from a sea bourne attack.

Parking is available at the nearby D-Day Museum car park, the Pyramid Centre car park and along the seafront.