Under general discussions in the ESO Forums I found this today.
"ZOS_GinaBruno;1158813"]We're happy to announce that Update 3 (patch v1.3.3) will be released next Monday, August 4th. :)
Nice to have a date available for this patch. Could have expected the 4th though since ESO was released on the 4th and Monday is the 4th, and regular patches happen on Mondays.
Look out for a color explosion!
Caytlynne of Skye
V12 EP Sorceress