@erichw1504 Right at that source it says The side with the larger surface area is blown away from the wind direction, so that the smaller side, with the pointer, is pivoted to face the wind direction. Most wind vanes have directional markers beneath the arrow, aligned with the geographic directions.
I’ve never seen a working weather vane point anywhere but in the wind direction.
@Dutchess_III To see if said weather vane is working properly, check which way a flag is blowing. That’s usually the quickest way to see the wind direction.