The station was opened on 1 May 1907[2] by the London and South Western Railway (LSWR) to serve Knowle Hospital, then known as the Hampshire County Lunatic Asylum.

From the beginning, this simple halt was fitted with electric lights, powered from the nearby hospital's generators.

The station was originally closed on 12 August 1963, but was re-opened the following day due to objections from trade unions.

[3] The concrete supports of the former platform still exist alongside the now single track of the Eastleigh to Fareham Line.

Due to the provision of much new housing on and around the former hospital site, on the outskirts of Fareham, it has been suggested that the station should be considered for reopening.