As the chill sets in Melburnians are in for another month of rail works and travel disruptions.

With the city's major south-eastern lines all shutting down sections, the Carrum sky rail beginning construction, and a smattering of other closures across the map, this blitz is enough to give even the most seasoned commuter a headache.

Metro's winter construction blitz is set to hit Melbourne's southeast hard. Credit:Simon Schluter

A number of lines have been under construction during June, and the month will be rounded off with buses replacing all city loop trains on Sunday June 30.

Cranbourne, Pakenham and the Frankston/Stony Point lines will be the worst hit in July.