The ban comes as firefighters continue to battle a bushfire that is still raging through the Royal National Park along Sir Bertram Stevens Drive between Garie Beach and Wattamolla Beach.
In the Southern Tablelands of NSW, a bushfire has burnt more than 1600 hectares at Bannaby, with firefighters working overnight to establish and strengthen containment lines.
The national park will remain closed today as conditions are forecast to worsen.
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"That smoke has been affecting south-western Sydney, the Illawarra and further south along the coast but there's no threat to properties at this stage", a NSW Rural Fire Service spokesman told AAP.
"Their objectives are to protect properties, attack and contain the main fire and contain spot fires", the ACT Emergency Services Agency said.
Scores of visitors to the Royal National Park were rescued by boat from beaches after becoming stranded, according to the RFS.
Boats from Marine Rescue NSW, NSW Police, NSW Maritime and Surf Life Saving NSW evacuate people from the Royal National Park.
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The fire had increased in activity earlier on Sunday but conditions eased into the evening, allowing firefighters to downgrade the blaze.
Helicopters that can drop water have also been deployed to aid firefighters in their efforts to control the blazes.
NSW RFS Commissioner Shane Fitzsimmons said it appeared the blaze was deliberately lit.
A TOTAL fire ban has been declared for the Greater Hunter, Southern Ranges, Central Ranges, and North Western regions as the state prepares for another week of scorching temperatures.
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