Get away this long weekend?

[Condi]

Day/2 day trip this weekend? Somewhere quiet and by the sea would be nice. If there is a small harbour where I could maybe go fishing or crabbing that would great too. I have a motorbike and enough space for some luggage. Cornwall/Devon appeal, although they will likely be heaving with families, kids and caravans.

Any locals down that way got any suggestions? Ideally 3 hours from Banbury which limits access to remote regions unfortunately.