The remaining AFL finals will be affected by the springtime weather roller-coaster, with this weekend's evening preliminary finals looking noticeably warmer than next week's daytime grand final, weatherzone.com.au says.

"The roller-coaster will reach a high point for this weekend's two preliminary finals, with temperatures in the high teens before a cooling descent for the following weekend's grand final," Weatherzone meteorologist Brett Dutschke said.

"Friday evening's Sydney-versus-Collingwood clash in Sydney will begin at a breezy 19 degrees then gradually calm down and cool during the game, to about 16 degrees by the end.

"Early in the game the wind will be blowing about 20km/h from the south-west, amounting to a one-goal breeze to the northern end, potentially strong enough for shots at goal to be blown off target. The wind should gradually drop off during the game, reducing the impact," Mr Dutschke said.

"Saturday's Hawthorn-versus-Adelaide game in Melbourne will be played in similar temperatures to the Sydney match, but it will be much calmer. There will be virtually no wind advantage in the light north-easterlies. This weather should be conducive to skilful footy."

A colder change due on Sunday will herald a chilly start to grand final week in Melbourne.

"After some midweek warmth in Melbourne, a second blustery cold change is likely to move in at the end of the week. The timing of this change means Friday's grand final parade and Saturday's big game will be impacted by more winter-like weather.

"With the temperature struggling to warm past the mid-teens both days, spectators may need a coat, particularly with the threat of brisk winds and showers."

Grand final day should still be a bit warmer and sunnier than last year's gloomy 14 degrees. It looks like being slightly colder than the 17-degree average for grand finals in the last decade.

smh.com.au