There is a lot of conjecture about rising sea levels in the press and on the net.
Recently there was an open letter in a Sydney paper written by a man that has studied sea levels for 30 years. He has gold medals for excellence in research. His view is that sea levels are about the same as they have been since at least 1841
www.john-daly.com/ges/appendix.htmA recent TV program focused on the same subject. Anecdotal evidence given by participants varied from seas rising over a sea wall that had been recently constructed on (I think) Thursday Island to a man that had lived on the same seaside property for about 30 years. He indicated that he lived only metres from the sea and it hadn't risen an iota.
I wonder how your piece of coast is managing? In Western Australia there is a a rocky outcrop called Triggs Island. It is really an isthmus yet at least twice in my lifetime I have seen it surrounded by sea. A true island. I went down to Triggs recently to check the level for my own interest. The water level was so low it was possible for me to circumnavigate the "island" on foot.
I would be interested to hear what is happening at your local beach. Obviously storms and extreme tides need to be taken in to account but how different is it now from say, 30 years ago?