Mourinho announced the passing of his father via his Instagram with just a photo of himself as a kid alongside his father.
The Manchester United boss frequently flew to Portugal last season to visit his father who was battling with a long-term illness.
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During Mourinho’s second stint at Chelsea, he was in and out of the hospital and was last June diagnosed with pneumonia.
Details about the death have not been released and Mourinho has not made any comment apart from the Instagram post.
According to reports from Portugal, the funeral will hold on Thursday, June 29.
Mourinho first learnt football lessons from his dad who coached him in his early playing days.
Felix, a former goalkeeper made his Primeira Liga debuts in 1958–59 with Vitória de Setúbal.
He spent 13 seasons with Vitória de Setúbal where he won two Portuguese Cup titles. He also played for another Premeira side C.F. Os Belenenses.
He had one cap for the Portugal national team before retiring at the age of 36.
He kicked off his coaching career in 1976 and went on to coach the likes of Amora FC, Rio Ave FC and Vitória de Setúbal.
As a coach, Felix won the Portuguese Second Division title three times, the Third Division once.