Windsock and wind vane indicates wind direction.
Wind direction refers to the direction the wind is coming from or from which it is blowing. Instruments such as windsock and wind vane can indicate wind direction. The instruments function by their movement to reduce air resistance. A windsock indicates where wind is blowing from by the direction that its larger opening faces, while the direction a wind vane is facing by prevailing winds indicates the direction the wind is coming from.