Just did a Google Search and less than 3/100 pictures have no sun or evidence of rain, floods, oceanic storms and wet dogs (not necessarily in that order).
Only when you search Cornwall/England/Storm do you see much water and that is mostly Neptune reaching for what is probably his in the first place.
Enjoy and bring a couple plastic bags, use them for carrying ice for your beer. And if it rains you will be the the first to document it properly in the world famous Fijifilm colors.