Yeah there are plenty of routes that can be climbed in the wet at Nowra.
South Central will be completely "dry" (ie. the rain wont directly be wetting the holds) however it will most likely be a spoogefest if its raining heavily. Still climbable though.
The cheesedale roofs will be dry, except for maybe the finish holds for the 23 as they are around the lip. And the 24 roof there does seep in the wet too. But "Wham Bam Thank you Maam" (24) at Cheesedale is worth getting on if you're there and will be dry too.
PC is super weird. It might not have rained for 6 months, but some of the holds will be spooge as. And then some of the best conditions i've had down there was when it was absolutely bucketting down with rain.
Grease cave and pocketed wall will be dry, but spoogy.