Get Ready To Freeze: 'Strongest Weather System This Winter' About To Hit

Brace yourselves because the “strongest weather system this winter” is about to slam into the southeast bringing icy temperatures, strong winds and buckets of snow.

High winds and plummeting temperatures are expected to hit South Australia, Victoria and New South Wales as dual cold fronts sweep across the country.

South Australia will cop the brunt of the wintry blast with damaging winds and rain forecast to hit from midday, bringing warnings of dangerous road conditions, rough seas and high coastal swells.

"This is due to a cold front linked to a low to our south which will also bring with it squally showers and possible thunderstorms and small hail," Bureau of Meteorology acting state manager Catherine Kennedy said.

Temperatures are forecast to remain below 15 degrees until Wednesday.

Parts of Victoria, including Melbourne, will be lashed with wind gusts of up to 100 km/h and dumps of rain of up to 15 mm from Thursday afternoon and into Friday, while parts of the city are forecast to peak at just 10 degrees.

Blizzards are likely in the alpine region across the same period.

So to put it simply, as the bureau did, the advice is to avoid outside activities if you can.

NSW won't be spared either, a severe weather warning has been issued for damaging winds across a big chunk of that state including Sydney, the Illawarra, Snowy Mountains and parts of the South Coast and Central Tablelands.

Wind gusts of 90 km/h expected in some areas, with the worst to lash the metro area on Friday morning.

The temperatures will plummet just in time for the weekend, with Saturday and Sunday expected to be a shiver-worthy 14 degrees.

It's good news for snow bunnies though, up to a metre of snow is forecast from Thursday through to Saturday, with a follow-up dump on Monday.

READ MORE: Bitterly Cold Antarctic Surge To Snap-Freeze Eastern Australia

The blast comes off the back of July, the fourth-warmest month on average for Australia as a whole, with nationwide temperatures 1.6 degrees above average.

The January-to-July period was the second-warmest on record, and countless heat records have been smashed Australia-wide this year

With AAP.