NSW Premier Gladys Berejiklian says there have been 13 new cases of COVID-19 identified overnight in NSW.
Three were from overseas travellers and one was found in someone returning from Victoria.
"We're doing okay, we're holding the line, but the next few weeks will be very precarious," Ms Berejiklian said.
"We can't be complacent."
One of the new cases was not linked to any other known cases.
One case attended the Apollo Restaurant at Potts Point, one attended Advance Early Learning Childcare Centre Merrylands and one attended the Mounties Mount Pritchard. Five others were close contacts of known cases.
NSW Health also announced some venues in Newcastle had been put on high alert after a Sydney case who visited Newcastle on July 29 and 30 while infectious.
NSW Health is urging anyone who visited the following venues to strictly isolate at home for 14 days from the date below and get tested regardless of symptoms, but remain in isolation for the full 14 days even if the test is negative.
- Hotel Jesmond on 29 July between 7.30pm and 9.30pm
- Wallsend Diggers on 30 July between 7.30pm and 9.30pm
A person who was infectious with COVID-19 attended Fitness First at Rockdale on 27 July 2020 from 11.25am to 12.30pm, and a person who was infectious attended a yoga studio in Bondi on 23 July 2020 from 12.15 to 1.15pm.
Both cases are associated with the Apollo Restaurant cluster at Potts Point and were previously counted in the public health alert. Close and casual contacts have been individually identified.
There are now 101 cases associated with Thai Rock Wetherill Park cluster, 58 cases associated with the Crossroads Hotel cluster and 35 cases associated with the funeral events in Bankstown and surrounding suburbs, including eleven associated with Mounties in Mount Pritchard.
There are 26 cases associated with the Potts Point cluster, including 20 cases linked to the Apollo Restaurant cluster and 6 cases linked with the Thai Rock Restaurant Potts Point cluster (two cases attended both).
While she was primarily announcing VET funding for a school in Western Sydney at her morning media conference, Ms Berejiklian also reinforced her weekend message about the need to be on high alert and wear masks in certain environments where people are unable to social distance.
On Sunday, Ms Berejiklian and NSW Chief Health Officer Dr Kerry Chant said they recommended wearing a mask in indoor settings where physical distancing is hard to maintain, such as on public transport or in supermarkets,
The also said masks should be worn in indoor settings with a higher risk of transmission, such as for the staff of hospitality and customer-facing venues i.e. cafes, restaurants, pubs and clubs and during attendance at places of worship.
Dr Chant recommended people wear face masks "made from three layers of breathable fabric to ensure adequate protection" and wash reusable masks after each use or at least daily.
Ms Berejiklian said she had witnessed many people wearing masks in supermarkets when doing her own shopping on Sunday.
"I always have a mask in my pocket," she said.
"I recommend everyone have one in their pocket or their bag, and if they feel they are in a situation where they need to wear one, they should."
As it is also education week, Ms Berejiklian thanked the education community of teachers, students and parents, who she said had been "absolutely outstanding" in staying COVID safe in recent months.
"Learning together is the theme for this year, and most appropriate because we are all in this together," she said.
Meantime, according to the ABC, Victorian Premier Dan Andrews is expected to announce 429 new cases in his state. This is significantly down from the average daily numbers which have been announced across the previous week.