i think anywhere along the south coast is lovely. I just came back from a week at Bermagui and we had so much fun. narooma which is just before it has the lovelist blue water around. But it is a bit further then you say. kiama is lovely. That is a day trip place for us and we love going there. The have great seaside markets that are once a month. There are 2 blowholes and you would likely see whales this time of year. Places like berri are a close and a nice drive to do while down there and there are so many different beaches to go to within short driving distance.