The most comfortable wind ranges for general kite flying are those between 5 and 15 m.p.h. Always remember that even if the wind at ground level is light and manageable, a few thousand feet up it may not only be considerably stronger, but also blowing in a different direction. It is never recommended to fly a kite in winds over 6 on the Beaufort Wind Scale.
In 1806 Admiral Sir Francis Beaufort of the British Navy devised a wind velocity scale to enable the captains of sailing ships to accurately assess wind speeds at sea. Though the original scale dealt with purely maritime effects, it has since been modified for land.