What it usually means
Water takes the shape of whatever contains it, has no fixed form of its own, and can hold you up or close over your head without changing in the slightest. Dreams use it for emotional life for exactly those reasons, and they have done so for as long as there are records of people writing dreams down.
The useful move with a water dream is to stop asking what water means and start describing the water. Clear or murky. Still or moving. Shallow enough to stand in or deeper than you are tall. Warm, cold, rising, receding. Every one of those is a description of a state rather than an event, which is why water dreams often feel atmospheric and hard to summarise: they are reporting a condition, not telling a story.
The second question worth asking is where you were in relation to it. On the shore, in it, under it, or watching it from a window — that position tends to say more about how you are meeting the feeling than the water says about the feeling itself.
What changes the meaning
Clear, calm water. Emotional clarity, or at least stillness. You can see the bottom. These dreams often arrive after something has settled rather than before.
Murky or dark water. Not danger by default — opacity. Something is going on that you cannot see into, which is a different complaint from something being wrong.
Rising water. The classic anxiety form. What matters is the rate. Slowly rising water tends to accompany accumulating pressure; a sudden flood, an event that arrived all at once.
Drowning, or water closing over your head. Being overtaken by feeling rather than moving through it. Worth noticing whether anyone else is present and what they do, because dreams are very exact about who does not help.
Swimming. Meeting the same element actively. Swimming well and swimming exhausted are two different dreams; so is swimming toward something and swimming away.
Standing at the edge without entering. One of the most common water dreams and among the most readable. Something is being approached and not entered, and the dream usually knows what.
Water in the house. Feeling in a place built to keep it out. Often accompanies a private matter leaking into ordinary domestic life.
Rain. Softer than the rest. Rain falls on everything without selecting a target; it tends to carry release, weather, or grief that is already moving rather than stuck.
A waterfall, a river, the sea. Scale changes the subject. A river implies direction and current, the sea implies something larger than any individual response to it, a waterfall implies a drop that cannot be reversed once entered.
When it keeps coming back
Recurring water dreams are usually reporting a continuing emotional condition, not a repeated event. They are common in long stretches of grief, of caring for someone, of unresolved conflict — situations with no single moment to point at.
The thing to track is the water's state over time rather than any single night. Water that grows clearer across months is worth noticing. So is water that keeps rising a little higher. Dreams are poor at dates and surprisingly good at trends.
In Jungian terms
Jung used water as the standing image for the unconscious: the part of psychic life that is real, active, and not available to inspection from the surface. Depth in that reading is not danger. It is simply how far down the material lies.
What follows from that is a different attitude to the frightening versions. Deep water in a dream indicates that something substantial is present, not that you are about to be harmed by it. Drowning dreams describe being overwhelmed by contact with that material, which is a real experience and also a survivable one — and the same dream often returns later with the dreamer swimming.
The plain form of the question is this. What is the state of the water, where were you standing, and which feeling in your waking life currently has exactly that shape.