Climate models generally provide plausible estimates of change at continental scales, although there is greater confidenceintemperaturethanprecipitation(Randalletal.2007).On the basis of such models, it was predicted that all of Australia was likely to warm this century, although the warming would be less in the south, especially in winter (Christensen et al. 2007). Further, it was predicted that precipitation would be likely to decrease in southern Australia (Christensen et al. 2007; Perkins and Pitman 2009), and increase over northern and central Australia (Perkins and Pitman 2009). However, downscaling anticipated changes in climate from continental- and regional-scale modelstothosethatmaybeapplicabletospecific estuaries is more challenging, although necessary (but see Timbal et al. 2009).