The public has been warned to plan ahead due to huge crowds flocking to the Ayrshire coast.
Travellers have been asked to avoid trains if possible to help key workers and others making essential journeys.
Due to 'extremely high passenger numbers', the national rail operator has warned that non-essential travel may not be allowed.
⚠️ We're seeing extremely high passenger numbers across our network today. If your journey is not essential, you may not be able to travel. pic.twitter.com/6ai4pPLVGZ
— ScotRail (@ScotRail) July 31, 2020
ScotRail reported "exceptionally high numbers of people" heading on trains from Glasgow Central towards Ayr resulting in queues for boarding.
This includes trains stopping at Kilwinning, Irvine, Troon, Prestwick and Ayr.
The train operator warned travellers that they may not be able to take their first choice of service so should allow extra time for travel.
The weather has been extremely warm today and the glorious heat has attracted people to Ayrshire's beaches.
Highs of 24 degrees Celsius have been recorded across Ayrshire.
A ScotRail spokesperson said: "Remember that key workers and other folk making essential journeys still need to travel. Please be considerate and help us make sure they can safely.
"If you can travel another way, we recommend strongly that you do."
NEW: Due to exceptionally high numbers of people heading to the coast, all customers travelling on services towards Ayr from Glasgow Central will need to queue for boarding.
— ScotRail (@ScotRail) July 31, 2020
You may not be able to take your first choice of train, so allow extra time for travel. pic.twitter.com/QiXSH41bM7
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules hereComments are closed on this article