Spring warmth will sweep across southern Australia during the next week, causing a number of places to see their highest temperature since early autumn. Northerly winds ahead of an approaching front will draw warm inland air across Australia's southern states in coming days. The warmth will move from west to east and is already affecting Western Australia today. Perth is forecast to reach 32 degrees this afternoon, which would be its warmest day since March. Saturday is tipped to reach 30 degrees before the mercury dips back to the the low twenties on Sunday, behind the front. The eastward moving tongue of warm air will cause temperatures to climb in South Australia, Tasmania and Victoria from Monday. The slow-moving nature of this system will allow the warmth to linger in southeastern Australia for most of the week. Adelaide is forecast to reach 32 degrees on Tuesday and have three days over 30 degrees between Monday and Wednesday, both feats which haven't occurred since March. Hobart is forecast to reach at least 20 degrees between Sunday and Thursday. This would only be the city's second five-day spell above 20 degrees during October since 1977. Tuesday's high of 28 degrees would be 11 above average for October and Hobart's warmest day since March. Melbourne should venture into the high twenties from Monday and may have its first 30 degree day of the season on Wednesday. The impending warm weather is likely to be a welcome change for many southern Australians that endured notably cold nights during the middle of 2017. Based on minimum temperatures, Victoria had its coldest winter in 11 years and Hobart had its second coldest winter in more than two decades.