Yeah local here in kiama, a lot of people that I've fished next to are from Sydney mostly staying for the weekend.
There are a lot of locations you can fish around and in Kiama. There is one spot that always have a bit of luck Bombo beach if have surf rods or off the rocks to catch samon and King fish.
If you wanna have a relaxing fish with no loud waves the Kiama harbour is great to catch small bonito and even small sharks!
Minnamurra river is not to bad to catch all your river from fish to flathead, mullet, black fish, bream and occasionally mulloway under the bridge. Try soft plastics.
Hope all goes well mate