Unless the trichomes are physically damaged, the terpenes should stay stable, no matter the wind.
As hillman said, as long as the branches/flowers are not crashing into each other, there should be no problems.
When growing outdoors, this is sometimes impossible to avoid, but as long as you harvest after 24-36 hours of calm conditions to allow any damage to heal, terpene reduction is something I have never noticed in over three and a half decades of outdoor growing.
Harvesting about an hour or so after sun up/lights on seems to produce the most aromatic flowers in my experience.
Waiting until the end of the day or after many hours of "lights on time" seems to produce flowers with reduced smell, no doubt due to the volatile oils in the terpenes having been evaporated in the heat and before a nights recovery and restoration with fresh oils/terpenes once again boosts aroma.
Hope this helps, Organoman.