I suggest you park on either High St. or in the parking lot at Gerry's (end of Beach St.) and enjoy a walk along the beach or pavement. You are looking for a camoed waterproof match holder (micro). Please don't disrupt the natural dune vegetation, there is no need to in order to find the cache. This should be a pretty easy find! Watch out for muggles on the beach and path.
Good luck and Happy Caching!
Check out my other geocache in Southampton: At the Corner of History and Nature GC5YR8P
Please post your sunset pictures, I would love to see them!