It is hard to tell...August will probably have drop off of tourist attendance, but you have to think about the APs...They have all been blocked all summer and just waiting patiently to throw their AP lanyards around their neck and race to the park...I know that I am guilty of running to DL (minus the lanyard, god forbid) as soon as my block dates are over... August will be interesting..sorry I could not answer your question better...
Note, Disney is promising nightly entertainment through August 23rd, and then cut back hours and weekday entertainment offerings, as many kids will be going back to school prior to Labor Day.
Also it is important to take into consideration the Southern California Annual Passholders, who are currently blocked out until August 16th. So that week will be busy, mainly due to the AP holders trying to see the Summer Nightastic! offerings, and maybe even Murphy the Dragon will be working that week
Also it is the last week that the Summer Fun Pass SoCal ticket will be on sale, and that usually gets a few more folks trying to take advantage of the offer before it ends.