Travel to Western Australia from every state will be restricted from midnight on Sunday, as Premier Mark McGowan again tightens the state's border rules.
Queensland will move to medium-risk status at that point, meaning only exempted travellers will be allowed to enter WA.
Tasmania will also move to low risk, forcing any arrivals into self-quarantine for two weeks.
It comes as Queensland recorded 16 new community cases on Friday and after Tasmania reported its first infection since it reopened its borders on Wednesday.
Mr McGowan said the changes were necessary to try to keep WA COVID-free until it reopens its borders on February 5.
"We want to try and get through the Christmas, New Year period without any spread of the virus in Western Australia," he said.
The Premier said the changes would avoid the "pandemonium and chaos" happening in the eastern states.
"We want our small businesses to be successful over the Christmas, New Year period," Mr McGowan said.
"That's why we didn't want to put in place restrictions and limitations on people and businesses over the Christmas, New Year period, and I think our approach is the safest and most secure one for Western Australia."
Premier wants to 'try and hold' COVID-free position
Mr McGowan denied the move to tighten restrictions made him a "Grinch", with the changes coming into effect less than a week before Christmas.
"I'd much prefer to be in our position than the position they're in in the other states," he said.
"We are, at this point, COVID-free.
"We can have a great Christmas with family and friends, our shops and retail and hospitality can all stay open, and we can have a summer holidays which are entirely normal.
"The thing I want to do is try and hold that until at least February 5."
But he admitted that would not necessarily be a popular position.
"It's not an easy thing, and no doubt I'll get lots of people attacking and criticising and so forth," Mr McGowan said.
"But we're doing what we have to do to try and keep the state safe as we get to that very high level of vaccination and reopening on February 5."
Mr McGowan also acknowledged that even with strict border controls, he could not guarantee coronavirus would not reach the state before borders reopen.
