Via a client note from Deutsche Bank:

The AUD has fallen today ahead of the RBA …. but some of the move (if not most of it) is an across the board USD strength move. Bear in mind that the RBA will have the Q2 GDP data in front of them at the meeting today … I would thus expect the language they use in the accompanying statement to shade a little more away from dovish, leaning a wee bit more hawkish.

More on what to look for from the RBA today: