There is reportedly an increase in fire activity at Royal National Park due to wind.
According to the NSW Rural Fire Service, aircraft and firefighters are working in the area.
It is understood that the wind will cause an increase in smoke, but there is currently no immediate threat to homes.
This comes after large fires broke out over the weekend.
Firefighters worked to control the blaze overnight, with efforts concentrated on the northern side of the fire.
Today, crews are patrolling containment lines and will blackout any hotspots.
The strengthening north easterly winds may prove a challenge with the fire burning remaining pockets of bush behind containment lines.
The smoke is expected to continue to drift over South Western Sydney, the Illawarra and South Coast.
Advice remains to avoid the area, with the Royal National Park closed today.
If you are in the Royal National Park, follow the advice of emergency services.
Earlier on Hit
The Royal National Park has been closed as firefighters are attempting to tame two large bushfires that are burning out-of-control.
Multiple crews of fight fighters were called to attend to a large bushfire near Bundeena in Sydney's south this morning before a second blaze erupted in the early afternoon.
The NSW Rural Fire Service has alerted owners of properties on Long Gully Rd, Alders Road, Crees Road and Bennaby Road to be prepared to evacuate as one bushfire edges closer to the area.
The NSW Rural fire services also told those who were already at the park at the time the blaze started, to only exit if the path ahead is clear or they have been directed to do so by emergency services.
Water bombs are currently being used to tame the blaze.