What is Wind direction?

Wind direction is generally reported by the direction from which it originates. For example, a north or northerly wind blows from the north to the south. The exceptions are onshore winds and offshore winds. Wind direction is usually reported in cardinal direction, or in degrees. Consequently, a wind blowing from the north has a wind direction referred to as 0° ; a wind blowing from the east has a wind direction referred to as 90°, etc.

Weather forecasts typically give the direction of the wind along with its speed, for example a "northerly wind at 15 km/h" is a wind blowing from the north at a speed of 15 km/h.