Hello Felix,
Raul nailed it, ironically, August may be our lightest wind month of the year. The nearest wind destination would be SE Texas, Corpus Christi to South Padre Island. Looking at historical winds for August last year, the later half of the month had quite a few squalls messing the useable winds up somewhat. Not sure how regular an event that is annually. More in the wind archives at:
http://www.ikitesurf.com/windandwher...1&timeoffset=0
Never been to the Gorge, yet. Raul has been going there for how long? The only observation I can offer is that the quality of the wind may differ there from your competition venues. The wind is pretty gusty there right Raul? If you are in serious training that difference if it is one might be significant.
NE California and Sherman Island come to mind as does Baja. August can be a poor wind month in the Caribbean due to tropical weather system impacts on tradewinds.
Good luck wherever you land!