Both lines were electrified in 1967 by British Rail using the 25 kV AC system, with the branch partially singled as part of the modernisation work.

A (now disused) connection to the former Glasgow and South Western Railway station at Greenock diverged from the branch line a short distance west of the junction.

The platform was located on the south side of the line and is now infilled – prior to electrification, it was used for carriages which were added to (and on return detached from) Wemyss Bay trains.

Port Glasgow is one of only two stations on the Inverclyde line at which all passenger services stop, the other being Bishopton.

During the evenings and on Sundays, the service between Glasgow Central and Wemyss Bay is reduced to hourly.