Western Australia is set to open its border to South Australia from midnight on Christmas morning despite the growing cluster in Sydney’s Northern Beaches.

WA Premier Mark McGowan confirmed that plans to allow people to enter the state from SA have not changed.

The news means that people will be allowed to enter Western Australia from Christmas morning onwards, without being subject to a mandatory 14-day quarantine period.

South Australia will reach the milestone of 28 days without a case of community transmission on Christmas Day, with WA using that number as a benchmark for reopening state borders.

The news will come as a welcome relief to those who had been planning on travelling to WA for the Christmas break, but feared that the growing cluster in NSW could lead to Mark McGowan pulling the trigger on tough border restrictions once again.