Recognising the wind direction is, of course, pretty important if you are to keep your kite downwind of you and keep it within the wind window. To find out where the wind is coming from you can look around you at flags, sails or trees, drop some grass, sand or snow and see which way it is blown, or even stick a wet finger in the air and feel which side is coolest. You can tell if the is directly behind you if the white noise is equal in both ears.
You can also look at clouds for both the current wind direction and to see the kind of weather which is approaching. Be aware that shifts occur all the time so keep checking exactly where the wind is coming from.
The major concern for wind direction is for kite surfers on the sea. It is a dangerous situation if the wind is off shore (that is, blowing from the land to the sea) as the kite will always want to drag its flyer out to sea. If the kite surfer is inexperienced he or she may not be able to get back in. Due to diurnal (daily) variation and sea breezes blowing from the cold sea on to the warm land, surfers will usually enjoy at least an afternoon of on or cross-on shore wind, depending on which way their shorelines lies and on the strength of local winds. Onshore winds, or cross-shore winds are ideal as the wind will be less turbulent having travelled over flat sea than if it had travelled over hilly land.