SOCCEROOS coach Holger Osieck has ordered that the Etihad Stadium roof remains open to make visitors Jordan as uncomfortable as possible in tonight's crunch World Cup qualifier.

The Socceroos seethed after Group B rivals Oman scheduled the clash with Australia last June for a 5pm local kick off with the mercury reaching 41C.

And now they plan to make Jordan's Melbourne experience unpleasant in a bid to secure the second automatic qualifying spot from Asia's Group B for Brazil 2014.

While the Socceroos rarely play internationals indoors, Etihad Stadium's retractable roof gave them the option, but Osieck and his coaching staff believe Melbourne's chilly conditions will give them an edge.

Watch a full replay of the Socceroos v Jordan on News+ websites (Herald Sun, Daily Telegraph and Courier-Mail) an hour after the final whistle

And the weather Gods may deliver Melbourne's famous bleak conditions, with the forecast at kick off set to be around 11C.

There's also a small chance of showers, but officials said the bulk of the estimated 43,000 fans will be covered despite the two wings being brought in to deliver a more rectangular feel.

Osieck refused to comment on why the roof was remaining open, except to confirm it would be the case.

"Yes the roof will be open," Osieck said yesterday.

Football Federation Australia officials yesterday informed the FIFA match commissioner that the roof would remain open and both teams had their first session in the stadium, each training for an hour.

The average June temperature in Jordan's capital Amman is 31C, but the national team played a New Zealand B team last week before coming to Melbourne.

Coach Adnan Hamad said the Jordan players had acclimatised to Melbourne's weather after arriving five days ago.

"We played a friendly match in New Zealand so we got used to, let's say the time difference," Hamad said through an interpreter.

"We came to Melbourne at an early stage so we're used to the weather as well."

Socceroos skipper Lucas Neill's call to arms appears to have paid off with over 13,000 tickets sold since the Japan game alone.

It is now estimated that at least 43,000 will turn up tonight, but Etihad Stadium spokesman Bill Lane assured fans that no one would be turned back at the gate.

"We have plenty of walk-ups available and people should not be deterred, if they turn up we will get them in," Lane said.

Neill, who has had meetings with members of the Socceroos' newly formed active supporters group Terrace Australis, said the players would be buoyed by the strong home support.

"I think as a country we owe it to ourselves to make sure we give ourselves the best possible chance of making it to Brazil and the way to do that is to feed off their passion and their atmosphere and create a good performance and walk away happy with three points, but it's going to be very difficult," Neill said.