Jim Mallinder’s men, who have two games of the Aviva Premiership regular season remaining, will start their pre-season campaign by taking part in the Challenge Vaquerin in southern France.
Castres will provide the opposition in Camares on Saturday, August 13.
The following weekend will see Saints face a Championship double-header as they welcome Cornish Pirates and Rotherham to Franklin’s Gardens on Saturday, August 20.
Those two matches will give supporters the chance to see as many of the squad in action as possible on the one day, with both games included in the 2016/17 season ticket package.
Saints will conclude their schedule with a trip to Belfast, where they will face Ulster at the Kingspan Stadium on Friday, August 26.