Frankston line commuters face delays from next month with a large section of the line to close to complete level crossing removals.

Buses will replace trains for 37 days between Caulfield and Moorabbin while a "blitz" is undertaken to finalise three level crossing removals.

Buses will replace trains for 37 days while the work is done. Credit:Justin McManus

When the line reopens the level crossings will be removed at Ormond, McKinnon and Bentleigh stations.

The government also confirmed the new stations at those locations will open progressively from August.