Services between Ayr and Stranraer, which were also affected by the disruption caused by the fire, are also expected to run normally from mid-morning tomorrow.
It comes less than a week after fire badly damaged station buildings at Troon, causing trains to terminate at Kilwinning.
There will be some cancellations due to the disruption caused by the blaze and Troon station itself will remain closed until at least Monday, July 26.
A shuttle bus service will serve Troon between Irvine/Kilmarnock and Prestwick Town on Friday and Saturday.
A ScotRail spokesperson added: “Due to continuing strike action by RMT union members there will be a reduced service between Glasgow and Ayr on Sunday, 25 July in line with previous strike days and Troon will not be served by rail replacement.
"ScotRail is advising customers to check their journey before they travel, buy their ticket before boarding the train and consult the train operator’s social media channels for up to date information.
“There will be a further update as soon as there is more news about the reopening of Troon station.”
The news comes after Network Rail announced that the railway through train station will reopen on Friday.
Liam Sumpter, Network Rail Route Director for Scotland said: “The damage caused by Saturday’s fire was extensive and we must make sure we have carried out all necessary safety checks, and made vital repairs, before we can run trains through this section of track.”