The Bureau of Meteorology (BoM) has issued a severe weather warning for damaging winds.
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A low pressure system is forecast to develop off the east coast on Tuesday night and Wednesday.
It is expected to produce a vigorous southerly flow on its western flank, a BoM meteorologist said.
Damaging wind gusts with peak gusts of around 100km/h are possible between Wooli and Wattamolla.
The wind risk is expected to contract from the south to the Hunter and Mid North Coast districts around mid-morning on Wednesday.
"The winds are forecast to reach 80, 90 and maybe 100km/h right along the coast," BoM senior meteorologist Angus Hines said.
"[The Mid North Coast forecast district] has a severe warning for southerly gales through Wednesday morning."
A separate hazardous surf warning has also been issued for the coastline.
Locations which may be affected include Sydney coast, Coffs Harbour, Port Macquarie, Newcastle, Woolgoolga, Sawtell and The Entrance.
he 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.
- Trees that have been damaged by fire are likely to be more unstable and more likely to fall.
- 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.
- Stay vigilant and monitor conditions. Note that the landscape may have changed following bushfires.
- For emergency help in floods and storms, ring your local SES Unit on 132 500.
