No, Skyrim has Werebears. :stare:
I'm pretty sure boars in the real world live in all the places bears live (except polar bears). In fact, I think boars are supposed to be much more adaptable to all types of environments. I don't see why a wereboar would be any different.
The lore or whatever you guys are getting your "fake creature facts" from is constantly changing anyway so that's a poor argument. Remember when Cryodiil was supposed to be a Byzantine city in a jungle?