Ulster defeated Bath, who placed fourth in last season's Premiership, twice last season in the Heineken Cup, 26-12 at Ravenhill in round 1 and 28-10 at the Recreation Ground in round 6.
Next month's 'friendly' will take on an extra significance given that the two teams have been pooled together again for European competition this season.
Ulster then travel to London where they will take on Harlequins on Saturday, August 21 (kick-off 2.30pm), before rounding off their pre-season programme at home to Neil Back's Leeds Carnegie on Thursday, August 26 (kick-off 7.30pm).
Former World Cup winner Back spent his first season with Leeds in 2008/09, guiding them to promotion from the Championship and last season they placed 10th in the Premiership table.
In a big change to the match night experience this season at Ravenhill, supporters coming to the home friendlies will see the car-park area of the ground transformed into a food village with lots of activities to keep adults and kids amused pre-match.