Ticketing details for this game will also be announced in conjunction with Ospreys later in the summer.
It will be Worcester's first return to the Liberty Stadium since the autumn on 2008 when the Ospreys secured victory when the two teams met in the LV=Cup.
It could also be a first return for former Wales international Jonathan Thomas who moved to Warriors from Ospreys this summer.
Warriors have already confirmed two home pre-season fixtures as Rotherham Titans (Wednesday, August 14) and Cardiff Blues (Saturday, August 17) visit Sixways Stadium.
Season Ticket holders gain FREE entry to our pre-season fixtures with Rotherham and Cardiff.
To become a Season Ticket holder for the 2013/14 season at Warriors call the Box Office on 01905 454183 or click HERE for further details.