Christmas Day in Adelaide is shaping up to be cooler than average this year.
The Bureau's Senior Climatologist Darren Ray says December 25 will "probably be a milder day with very low chance of rainfall".
"If you're planning your festive menu, you can consider including both turkey and prawns" he said.
But things should warm up a bit after that.
"While most of December is looking mild we may actually get a little bit of heat right at the end of the month and through to early January, so a warmer New Year's Day" he said.
The Bureau's Predictive Ocean Atmosphere Model for Australia (otherwise known as the much shorter POAMA) shows current weather patterns are keeping temperatures mild and relatively dry for much of December, with indications it won't start heating up until the end of the month.
However, like Santa, Christmas Day can also produce a weather surprise!
The Bureau's declared the onset of a late developing La Nina event which typically brings wetter and cooler summers, but they'll have a weak impact on Australia.
"The Bureau's Summer Outlook indicates coastal regions of southeast South Australia are the only part of the state likely to experience a warmer than average December" Ray said.
The first official forecast is due on Monday the 18th December.