That does look more like sunburn to me too, Ken. If it was from over watering, I think they would look yellow first.
Aidan, if it were my plant, I'd just put it back where you've always grown it, and leave it alone for while. IF the roots have rotted from all the rain, then it will die. If it just got sunburnt leaves, it will probably recover. But it may take until spring for it to forgive you . .