As adjectives the difference between wierd and weird is that wierd is while weird is...
(archaic) Of or pertaining to the Fates.
Connected with fate or destiny; able to influence fate.
Of or pertaining to witches or witchcraft; supernatural; unearthly; suggestive of witches, witchcraft, or unearthliness; wild; uncanny.
Those sweet, low tones, that seemed like a weird incantation.
* Shakespeare, Macbeth , Act 1 Scene 5
Whiles I stood rapt in the wonder of it, came missives from the king, who all-hailed me, 'Thane of Cawdor'; by which title, before, these weird sisters saluted me, and referred me to the coming on of time, with 'Hail, king that shalt be!'
Having supernatural or preternatural power.
There was a weird light shining above the hill.
Having an unusually strange character or behaviour.
There are lots of weird people in this place.
Deviating from the normal; bizarre.
It was quite weird to bump into all my ex-girlfriends on the same day.