@Knikki and
@SueJB I have been to Weston S'Mare. The sand sculptures are amazing when they have them but let's just say I wasn't surprised Banksy chose the place to host Dismaland a few years ago. I think, like many English beach resorts, it has had its day.
Sue, have you thought of Chichester harbour?
You can get to the city easily by train and then there are buses to places like Bosham in one direction and the Witterings in the other.
My grandparents all lived in Chichester so I used to visit the area as a kid and it still retains its charm