A weather warning has been released for Queanbeyan and Canberra on Friday.
The Bureau of Meteorology advises potentially damaging winds are likely to sweep through the region.
Winds averaging above 60 kilometres per hour are expected with wind gusts reaching as high as 90 kilometres per hour in some parts of the region.
Most of south-eastern NSW, particularly elevated areas, are expected to be affected by a low pressure system that is slowly moving east and will bring the high winds.
A gusty southerly wind change predicted for later on Friday is expected to bring winds to the alpine area of the state in excess of 120 kilometres per hour.
The NSW National Parks Service suggests anyone considering travelling in alpine areas reconsider any back country travel due to potential blizzard conditions.
The south coast may also be affected by high winds later on Friday and into Saturday.
The SES recommends people move vehicles away from trees, secure any loose items near houses and be careful near any fallen power lines.
For emergency assistance contact the SES on 132 500 or Triple Zero.