I'm no meteorologist, but do work in the inshore waters just a few miles from your site. I have found these guys a more reliable guide for local conditions than the MetOffice. Though the focus of their interest is not your own, their info is generally sound. Any forecast beyond 4 days here is pretty much conjecture, so it is a bit early to say anything specific.
The coastal strip here tends to establish its own weather system, quite disregarding conditions just a few miles inland. I am unsure whether Roxby will fall within that strip, or conform to the more general weather pattern. Either way it seems wise to hope for the best, but to prepare for the worst.