The Bureau of Meteorology (BoM) has issued a severe weather warning for damaging winds from Monday.
Winds will increase over much of the southern ranges from Monday morning as a front brushes the southern parts of the state, according to the BoM.
Winds should ease by the later part of the day as the front rapidly tracks to the Tasman Sea.
Damaging winds, averaging 60 to 70 km/h with peak gusts in excess of 90 km/h, are possible over much of the southern ranges, ACT and the elevated parts of Illawarra and South Coast from the late morning on Monday with the passage of a front.
Wind gusts are most likely to be within thunderstorms and fast moving showers.
Locations which may be affected include Bowral, Thredbo, Perisher Valley, Charlotte Pass, Braidwood, Canberra, Goulburn and Cooma.
The State Emergency Service advises that people should:
* Move vehicles under cover or away from trees.
* Secure or put away loose items around your house, yard and balcony.
* Keep at least 8 metres away from fallen power lines or objects that may be energised, such as fences.
* Report fallen power lines to either Ausgrid (131 388), Endeavour Energy (131 003), Essential Energy (132 080) or Evoenergy (131 093) as shown on your power bill.
* For emergency help in floods and storms, ring your local SES Unit on 132 500.