Jannali station opened on 7 February 1931.[3][4] The development was requested and largely funded by Sutherland Shire Council. The road bridge over the railway at Jannali was constructed at the same time as the station.
A minor upgrade was completed in April 2013. Improvements included redesigning and rebuilding the ramp on the western side of the station and upgrading the footpath on the eastern side of the station.[5]
The station received a more substantial upgrade in 2017, when a footbridge with lifts was built.