Another Q&A, scroll down the page at the link:
"Q: The students in my CCD class are asking whether it is okay to use a Ouija board or call the psychic hot-lines advertised on television. Are these practices permissible?
A: No, both are forbidden. The psychic hot-lines claim to have people who can tell you the future, not by divine revelation, but by psychic means. This is the practice known as divination, and it is forbidden in Scripture. Ouija boards are used in an attempt to gain information from the spirits of the dead and thus constitute a form of necromancy (not the same as asking departed Christians to pray for one, but trying to get information from the dead).
Both divination and necromancy are forbidden in Scripture and the Church’s official documents. The Bible states: “When you come into the land which the Lord your God gives you, you shall not learn to follow the abominable practices of those nations. There shall not be found among you any one who burns his son or his daughter as an offering, any one who practices divination, a soothsayer, or an augur, or a sorcerer, or a charmer, or a medium, or a wizard, or a necromancer. For whoever does these things is an abomination to the Lord; and because of these abominable practices the Lord your God is driving them out before you. You shall be blameless before the Lord your God. For these nations, which you are about to dispossess, give heed to soothsayers and to diviners; but as for you, the Lord your God has not allowed you so to do. The Lord your God will raise up for you a prophet like me from among you, from your brethren-him you shall heed” (Deut. 18:9-15). Such practices are forbidden in New Testament passages (Acts 19:18-19, Gal. 5:20-21, Rev. 18:23).
This shows us that God’s method for communicating supernatural information to his people would be by divine revelation through prophets, not through divination and necromancy.
In the same way, the Catechism of the Catholic Church states: "God can reveal the future to his prophets or to other saints. Still, a sound Christian attitude consists in putting oneself confidently into the hands of Providence for whatever concerns the future and giving up all unhealthy curiosity about it. Improvidence, however, can constitute a lack of responsibility.
"All forms of divination are to be rejected: recourse to Satan or demons, conjuring up the dead or other practices falsely supposed to ‘unveil’ the future. Consulting horoscopes, astrology, palm reading, interpretation of omens and lots, the phenomena of clairvoyance, and recourse to mediums all conceal a desire for power over time, history, and, in the last analysis, other human beings, as well as a wish to conciliate hidden powers. They contradict the honor, respect, and loving fear that we owe to God alone.
“All practices of magic or sorcery, by which one attempts to tame occult powers, so as to place them at one’s service and have a supernatural power over others-even if this were for the sake of restoring their health-are gravely contrary to the virtue of religion. These practices are even more to be condemned when accompanied by the intention of harming someone, or when they have recourse to the intervention of demons. Wearing charms is also reprehensible. Spiritism often implies divination or magical practices; the Church for her part warns the faithful against it. Recourse to so-called traditional cures does not justify either the invocation of evil powers or the exploitation of another’s credulity” (CCC 2115-2117). "
Source:
catholic.com/thisrock/1996/9612qq.asp