While you can
There are proposals circulating about boosting the flood defences in Southsea, one of which has a 12 ft high wall running along where the promenade meets the beach, from the Sea Life Centre to Clarence Pier.
There is lots more information and a presentation at the Cathedral on 15 July (Saturday) midday, with an exhibition there from 15-21 July
There is more information at
PS: The first thing I was sent – from a legitimate source – was a PDF which I’ve failed to download and copy here. Sorry about that, simply my incompetence. However, here’s the screenshot from my IPad