Objects
Dreaming about the future is traditionally read as dreams experienced as previewing rather than processing — and the one category where the claim is testable. No survey has measured how often this one occurs, so we give the reading without a frequency — only 19 of the dream themes here have a published figure at all.
What research shows
Precognitive dream claims are common, but the arithmetic explains them: with roughly 4 dreams a night across a lifetime, coincidences between dream and event are statistically expected. No controlled study has demonstrated precognition in dreams.
The psychological reading
Confirmation bias is the mechanism — a dream is remembered as predictive only after the event gives it a shape.
When it turns up
This is the one dream category where the claim can be checked, and the arithmetic settles it. People dream several times a night for decades; matches between dream content and later events are guaranteed by volume alone, and memory edits the dream towards the event afterwards.
Not among the 55 themes ever measured — searched 18,250 times a month. Which dreams have been counted →
The version matters
The version carries most of the information.
Deja-vu-like dream recognition is a separate phenomenon and is reported by most people at some point.
Almost always identified as predictive after the event, never before. The detail people recall tends to firm up once there is something to match it to.
Usually a familiarity effect: the dream supplies a generic version and recognition does the rest. Dreamers rarely record the dream in advance.
These are reported around real worry, which is also when caution rises. The dream tracks the worry, and the caution takes the credit.
A distinct and common experience, reported by most people at some point. It concerns the sense of familiarity rather than any content.
The most frequently cited example, and the easiest to explain: you dream of people you think about, and you think about people you are likely to hear from.
The honest way to settle it for yourself. Write dreams down before the day happens rather than after, and the hit rate collapses to chance.
Commonly claimed, and wrong
No controlled study has produced reliable evidence of precognitive dreaming, and the successful cases never survive being recorded in advance. Treating dreams as forecasts leads people to make real decisions on no information, which is the practical harm.
How to record a dream, why the feeling matters more than the content, and when recurring nightmares are worth a doctor rather than a dictionary — set out once on the main page.
Asked most often
There is no reliable evidence for it. Volume and hindsight explain the matches, and no dream has been shown to carry information about events.
You dream about what is on your mind, and what is on your mind is often what is about to happen anyway. The misses are not remembered.
Write the dream down in full before the event, with dates. People who do this consistently stop finding hits.