Duty forecaster Abrar Shabren said the wild weather that brought snow to the Namadgi National Park on Friday was caused by a low pressure system hanging off the coast of south-east Australia.

Things would get slightly more pleasant as the system moved away, although there was still a strong chance of showers and high winds on Saturday and Sunday.

"Canberra should see some showers and cloudy conditions. By Monday the cloud should decrease," Mr Shabren said.

"Rain and the possibility of rain exists for the next three days. There is the possibility of snow falling above 1700 metres and it will be windy."

On Friday temperatures fell between five and 10 degrees, Mr Shabren said.

“It will be chilly and with the wind chill it will feel much colder.

“In the Brindabellas and the ski resorts in the Southern Alps there was a bit of light snowfall.”

Pictures from the ACT's Namadgi National Park showed a thick covering of snow in the south-west of the territory.

Parts of NSW awoke to snow on Friday morning, as a complex low-pressure system brought wind and cold weather to most of south-east Australia.

In the Central Tablelands, towns including Oberon and Blayney were covered in a light blanket of snow thanks to the cold snap that started on Thursday evening.

Damaging westerly winds are expected to develop through Friday due to the complex low-pressure system near Tasmania, changing to a gusty southerly wind later in the evening.

In alpine areas, peak gusts of more than 120km/h are expected, and the bureau warns of possible blizzard conditions for areas above 1700 metres.

The high southerly winds are forecast to continue into Saturday, but should ease by Sunday.

The wild weather caused flash flooding in Hobart's CBD, with cars swept away and emergency crews responding to hundreds of calls for help.

More than 13,000 properties lost power as the storms rolled in, while some vehicles were swept away after Hobart received almost 130 millimetres of rain in the past 24 hours.