There are several ways this may appear so.
Of course there is science and the observance of patterns, people have been predicting the future since the ancient Egyptians started observing the flooding of the Nile, and even before. They observed cyclic rhythms that necessitated the calendar and seasonal changes. They took this to predicting eclipses hundreds of years away and the time of sunrise/ sunset tomorrow at any given locality.
This is hardly surprising.It is all in science.
Of course you have the Sheikh Yahya type charlatans who rely on government assistance/ social networks and the general human ignorance and tendencyto need to know the future. This breed is ageless,it can be traced to be the legacy of the prophets of Asclepius such as Alexander who performed conjured tricks with hollowed oracles, tamed snakes and other hocus-pocus that would impress simple minded high school juniors and fearful consiracy theory prone cranks. This was simply the "karata tatu" of the day. One of my Buddhist monk friends called it "low art".
And even had it been that we have a truly unexplained teller of the future who goes beyond the means of science we know today, that does not mean god is behind it.
The famous science fiction author Arthur C. Clarke had a saying that attained a law like cult following, it goes "any sufficiently advanced technology is indistinguishable from magic".
A common technique in literature that demonstrates this is using a western explorer who is in some scientifically unsophisticated corner of the world, persecuted to death, and then conveniently predicting an eclipse which was in his diary all along, and hence assuming the status of a magical prophet . I think I saw this in at least one of the Zulu/British encounter movies.
The question implies that predicting the future is that impressive. It is not. It has been done by observing patterns for millenia.
Why, I can even "predict" that the sun will rise tomorrow!
And of course you always have the Nostradamic quartrains that are so cryptic to be attributed to anything that could fit the minds of eager believers.