Although the role of prophecy of in Lord of the Flies is a minor one, Simon does make a prediction in chapter seven when he and Ralph sit together during a lull in their hunt for the beast:
You'll get back to where you came from (100).
Almost as if he senses Ralph's fears about being rescued, Simon reassures his friend that he will eventually return to his old life. Noticeably absent from Simon's comment is any mention of himself, and that omission becomes startlingly prophetic after the boys murder Simon on the beach. In the end, rescue does come for Ralph in the form of the naval officer and his "trim cruiser" which has arrived just in time to save Ralph from sharing a similar fate to Simon.
Golding downplays the exchange between the two boys, and the other boys perceive the oddly prophetic Simon as "cracked." Despite their opinions, Simon's prediction does come true in the end, only adding to the mysticism and intrigue of Lord of the Flies.