Latest weather forecast suggests perfect conditions for the men's TT but that wind could be a major factor in the men's RR.
Melbourne's weather tends to follow a cycle (no pun intended) of cold southwesterly wind and rain, then calm or gentle easterly wind, then hot dry northerlies (= major bushfire threat in summer). Predicting what weather will come next isn't difficult, but predicting exactly when it will arrive, is. It looks like the southwesterly pattern will be in place for the U23 & women's TT, then the light easterly pattern for the men's TT & first two RR. Too early to say whether this weather will last for the men's RR or if, as the 7-day forecast is saying, the northerlies will hit just as the flag is dropped.
If the northerlies are blowing during the men's RR it'll be cross/tail out of Melbourne and tailwind for the sprint, but crucially it'll likely defeat anyone trying to go solo on the last climbs. At the top of the each climb they turn due north, the first in an exposed location and after the second it would be 2km dead straight into a 40km/h wind. I'd be amazed if it wasn't a sprint in that case.
I recommend consulting the
Bureau of Meteorology's forecasts. Some of the "world weather" websites are 5-10C off with their Australian forecasts and current temperatures.