‘Oppressive’ end to summer on the way
We're in the last week of summer and the season is set to go out on a high with scorching severe heatwave conditions for the south and "oppressive humidity" in the north.
In South Australia and Victoria, the heat will linger "day after day" forecasters said. That could see both Adelaide and Melbourne top out at or near 40C by the end of the week.
The cause of the heat's return in the southern states is a break to the monsoon further north, said Sky News Weather channel meteorologist Rob Sharpe on Monday.
"A monsoon break means the monsoon trough that brings cyclones and heavy bands of rain is no longer in the region," Mr Sharpe said.
"Continent wide temperatures will soar across the country because we are seeing extra sunshine compared to if we had (the cloud and rain associated with) a monsoon."
Tropical Cyclone Oma, which has already battered New Caledonia once, has now turned and is heading back to the French Pacific Ocean territory.
Bad news for them but better news for Queensland.
This week, coastal areas of the state will see fewer showers and the swell should recede leading to overall calmer conditions.
Brisbane is likely to bounce around the 30C mark with the possibility of showers every day this week. It will be similar conditions further north in the Queensland. However the rain levels will be nothing like what the state has seen in recent weeks.
But it could be uncomfortable, said Mr Sharpe, with "oppressive humidity" a strong likelihood due to all the moisture in the air and little of that falling as rain.
Darwin is looking at highs of 32C this week with a possibility of showers and storms. It could see humidity of 93 per cent on Wednesday and Thursday morning.
SEVERE HEATWAVE IN THE SOUTH
With the monsoon taking a siesta that's going to allow heat to build up once again in the south, as desert warmed air funnels down from the interior.
Mr Sharpe said most of South Australia would be stuck in the mid to high 30s all week. Adelaide doesn't look like it will have a day cooler than 36C until Sunday.
Most days this week will see a maximum of 37C until Friday when the mercury jumps another few notches to settle on highs of at least 40C in the South Australian capital. On a sticky Friday night, the mercury isn't forecast to dip below 27C.
It's a similar story in Victoria too.
"That heat will linger during the week, day in day out, building slightly each day until Friday and Saturday when we'll be in the midst of a severe heatwave across much of southern mainland Australia," said Mr Sharpe.
"It won't be until Sunday until we see a proper cool change move on through and drop those temperatures."
After a high of 34C on Monday, Melbourne will really start to heat up again on Thursday when the CBD is forecast to hit 35C inching up each day to reach 38C on the weekend.
Hot down in Tassie too. A sunny week for Hobart hitting 33C for the weekend.
Canberra will be in the 30s all week with highs 33C on Thursday and Friday.
Sydney's CBD will be markedly cooler than the capitals further south. Partly cloudy, it may not even get as high as 30C in the Harbour City although the days will be pleasant if you're lucky enough to get to the beach, peaking in the mid to high 20s.
Warmer in the city's west with Penrith reaching 34C by Sunday.
In Perth, the week will start off blisteringly hot with 37C on Monday. But it's pushing its heat towards the east and swapping it out for something a bit more bearable. The WA capital will see 31C on Wednesday then just 24C on Friday before returning to the low-30s on Sunday.
Although spare a thought for Kalgoorlie which should peak at 43C on Wednesday and then 45C on Thursday.