While the prime minister has not broken any rules, former Labor leader Bill Shorten doesn't think it's a good look.
"It's not that he doesn't deserve to see his kids, but so does every other Australian," Mr Shorten told the Nine Network on Tuesday.
"When people are doing it tough, you've got to do it tough too.
"You can't have one rule for Mr Morrison and one rule for everyone else. I just think it's appalling judgment."
But the prime minister did not break any rules because he was granted an exemption to return to Canberra after his dash to Sydney for the Father's Day weekend.
Both jurisdictions have shut their borders to each other amid fears the peak of Australia's third coronavirus wave is yet to come despite more than 26,000 active cases nationally.
Infections in NSW continue to surge with health authorities predicting daily cases will hit a high next week after another 1281 on Monday.
Victoria reached another outbreak-high daily increase of 246 new local cases as Melbourne battles an outbreak.
The federal health department estimates active cases have now surpassed 26,000, with the rapid rise of the Delta variant continuing alongside lockdowns.
Concerns southeast Queensland could be locked down are subsiding after there were no new cases of local transmission in Brisbane.
Canberra, which recorded another 11 cases, continues to lead the nation on vaccination rates with 50 per cent double-dose coverage expected this week.
Nationally, almost 36.43 per cent of population aged 16 and above have been fully vaccinated while 63.16 per cent are covered with a single dose.
Vaccine rollout co-ordinator John Frewen is confident supply issues that dogged the program have been conquered after the first shipment of Pfizer doses from a UK swap deal arrived.
"We've got the supply. We've got the distribution networks now," he said.
There are about 9400 places to get vaccinated across Australia with hopes the figure will rise to more than 10,000 in coming weeks.
"Really it all just does come down now to people turning up," Lieutenant General Frewen said.
Tasmania is the latest state government to signal it may retain hard borders with jurisdictions experiencing coronavirus outbreaks even when high immunisation rates are achieved.
WA and Queensland have drawn the ire of the federal government for cautious approaches to the national reopening plan which has vaccine targets of 70 and 80 per cent.
Modelling underpinning the agreement doesn't mention state borders, an increasingly controversial subject as jab rates increase.
The national death toll stands at 1044 after five more people succumbed to the disease in NSW.