FRIDAY night's semi-finalists can expect to be met by wet conditions with rain forecast to hit the MCG later in the evening.

As Geelong and Sydney gear up for their clash at 7.50pm AEST, the weather forecast is predicting a 90 per cent chance of increasing showers as the day goes on.

Sydney’s prolific midfield is unlikely to be fazed by wet conditions with the toughened bodies of Josh Kennedy, Dan Hannebery and Luke Parker likely to relish a hard-fought slog.

Likewise, the Swans' tall forwards Lance Franklin, Sam Reid and Callum Sinclair are in form and will be difficult to stop despite the conditions.

The second semi-final between Greater Western Sydney and West Coast at Spotless Stadium on Saturday night will be met with vastly different conditions.

It’s been extremely warm in Sydney over the past week, with the temperature hitting an astonishing 32C on Wednesday. Those warm and clear conditions are set to continue into Saturday evening with a predicted high of 22C.

After opting for a smaller line-up this week, GWS will likely favour the warm conditions and look to take advantage of its pace through the midfield.

On the other hand, West Coast’s forwards Josh Kennedy, Jack Darling and Jeremy McGovern down back will equally enjoy the perfect marking conditions.