The Bureau Of Meteorology have updated their forecast for Saturday's big game -but don't expect it to be warm.
Senior Meteorologist Dean Stewart said while it's warm today - the weather will plummet in around 5pm tonight.
"A cool southerly change is expected in the city around 5 o’clock – where the temp will plummet by about 10 degrees."
The cooler weather will continue through the holiday weekend with a risk of showers tomorrow during the parade on Friday, looking for a top of 16 degrees.
As for Saturday - Grand Final Day is looking to be very cool - with a top temp of 14 degrees - one degree hire than earlier forecasts.
Showers are expected mainly during the morning, and are likely to hit the south eastern suburbs.