From 2.20am to 11.50am, buses replace trains between Bomaderry, Port Kembla and Wollongong.
Trains run between Wollongong and Bondi Junction, some to a changed timetable.
The 02:39 Kiama to Bondi Junction service will run up to 20 minutes earlier than the normal timetable from Kiama to Coniston, then run to the normal timetable from Wollongong to Bondi Junction.
The first train leaves Wollongong at 11:05, arriving Kiama at 11:47.
The 05:19 Central to Kiama service starts from Waterfall at 06:02.
Use T4 Illawarra Line trains from Central to Hurstville, then a bus from Hurstville to Waterfall.