I'll assume you mean a seer as in some who sees the future or past. To my knowledge, as one, there is no society for those who can seer. I imagine the closest thing you can come to a "society" like that, is most likely a coven that focuses on psychic abilities or something of the such.
Almost all sites for seers etc are fake as they claim to be one and aren't ,
And a few newbies are mistaken on what a seer is and go all like" tell my future ,tell my future " etc,
Better to be in a clan or coven etc as wiccans develop or unlock their ability to become a seer