Al-Sudais comes from the Anza clan. He had memorized the Quran by the age of 12.
Growing up in Riyadh, Al-Sudais studied at the Al Muthana Bin Harith Elementary School, and afterwards the Riyadh Scientific Institution from which he graduated in 1979 with a grade of excellent.
He obtained a degree in Sharia from Riyadh University in 1983, his Master's in Islamic fundamentals from the Sharia College of Imam Muhammad bin Saud Islamic University in 1987 and received his Ph.D. in Islamic Sharia from Umm al-Qura University in 1995 while working there as an assistant professor after serving at Riyadh University