Brisbane Roar coach John Aloisi has called on his forwards to take their chances as the Queenslanders aim for their first win in four matches in Cairns this weekend.

Aloisi's side have only won once in their past five Hyundai A-League games, slipping from the top of the table to fourth over the past couple of weeks.

While the Roar are just four points behind leaders Western Sydney Wanderers - who beat Brisbane 2-1 last week - Aloisi is not satisfied with the output of his strikers and attacking midfielders.

Brisbane have scored at less than a goal per game over their last five matches.

"We need to be a bit more clinical in the final third and results will come," Aloisi said in Cairns on Thursday.

Centre-forward Jamie Maclaren struck his fifth goal of the season for the Roar last week, but Aloisi probably needs more goal-scoring output from the likes of Thomas Broich (0 goals in 2015-16), Dimi Petratos (1) and captain Matt McKay (0).

Brisbane are in far north Queensland for Saturday's game against Wellington Phoenix, who are just a point adrift of the Roar.

At kick-off on Saturday afternoon in Cairns, the temperature is expected to be over 30 degrees with humidity at approximately 60 per cent. Not that Aloisi's worried.

"We're fit enough, as a group, to deal with it. It might impact a little bit on the game but hopefully it impacts more on them [Wellington]," he said.

Aloisi hailed the pitch at Cazaly's Stadium as "brilliant" and called on the Roar to take advantage against the Phoenix, in the first of five matches versus teams currently below them on the table.

"This period is always an important period of the year - the Christmas period - because if you do well, it can set you up," Brisbane's coach said.

"We know it's going to be close at the back end of the season. At the moment there's five or six sides, who are really pushing to be in the top three. So we know that we have to pick up results and perform well, and we're confident we can do that.

"In the nine games we've played so far, we've been getting better and better each game. That will set up us nicely towards the end of the season because we keep on improving."