The service is to be at the Pretoria home of his uncle Arnold, where the Olympic athlete has been staying since he was released on bail awaiting trial on a premeditated murder charge.
Pistorius’ reputation management firm said he had specifically requested the service “as he remains in deep mourning for the loss of his partner Reeva”, whom he says he shot by accident assuming an intruder had entered his home on February 14.
“Oscar has asked for a private service with people who share his loss, including his family members who knew and loved Reeva as one of their own,” Vuma Reputation Management said.
Exactly a week ago, a memorial service was held for Ms Steenkamp in the southern coast city of Port Elizabeth, where her body was cremated following a private service.
That same day, the bail hearing for Pistorius started in Pretoria.
It was unclear exactly what Pistorius’ service would consist of or how many people would attend.
Prosecutors say the pair had an argument before Ms Steenkamp was killed. Vuma said that Pistorius “continues to grieve” for her.
Chief magistrate Desmond Nair set bail for Pistorius at 1m rand (£75,000). The 26-year-old track star was ordered to hand over his passports, turn in guns he owns and keep away from his home in a gated community in Pretoria. He cannot leave the district of Pretoria without his probation officer’s permission and is not allowed to consume drugs or alcohol.