Kosmina content with point
The temperature rose to as high as 30 degrees for the late kick-off Remembrance Day clash that saw the two top-four sides have to settle for a point following a 1-1 finish.
Both teams looked to be struggling to adjust the warm weather as neither ventured forward at a high tempo.
Adelaide switched off nearing half-time and were made to pay by Perth striker Billy Mehmet two minutes before the break.
But after the restart, the Reds hit back and equalised through Dario Vidosic and were arguably the better side in the second half.
Although the hosts had a handful of chances to snatch three points and remain at the top of the A-League table, Kosmina was content to share the spoils.
"We could have won but so could have they... given the conditions which I think probably affected us more than we thought they would, it wasn't too bad," Kosmina said.
"It (the weather) probably affected both teams. It was the same for them as us. Maybe it did slow the game up a bit, but we played with a good tempo.
"We did well in the first half, created a couple of good chances and didn't really let Perth in, but we dropped off probably 10 minutes before the end of that half.
"Unless you keep ticking over and are constant and have got good ball speed and tempo, Perth are the sort of the team that once you give them a sniff they will get on top of you which they did in the first half.
"Full credit to our blokes though, they came back in the second half and did really well."