…according to this article in the Saudi Gazette (thanks Elsa):

Belief in astrology and the casting of horoscopes are in clear opposition to the letter and spirit of Islam. It is really the empty soul, which has not tasted real Iman (belief) that seeks out these paths. Essentially these paths, represent a vain attempt to escape Qadr (predistination). The ignorant believe that if they know what is in store for them tomorrow, they can prepare for them today. In that way, they may avoid the bad and ensure the good. Yet, Allah’s messenger was told by Allah to say: ” I possess no power over benefit or hurt to myself except as Allah wills.”

Now I have no desire to bash someone else’s religion, and all scriptures are subject to interpretation.  We know that in the 8th and 9th centuries when sacred knowledge was stifled in the West by the Catholic Church, it was the Arabic astrologers who rescued the sacred arts, translating the ancient Greek works into Arabic, and their wisdom,such as the Arabic Parts (including the widely used Part of Fortune), is taught to this very day ..