What Stage of Dementia Is Sundowning?

Quick answer: Sundowning is most common and most pronounced in the middle (moderate) stage of dementia, when confusion has progressed but the person is still active and mobile. It can begin in the early stage and continue into the later stages, so it is better understood as a pattern than as a marker of one specific stage. Common triggers include end-of-day fatigue, low lighting and shadows, a disrupted body clock, hunger, pain and overstimulation.

If a loved one with dementia becomes more confused, anxious, or agitated as the afternoon turns to evening, you are seeing something with a name: sundowning. It is one of the most exhausting parts of caring for someone with dementia, in part because it tends to hit at the end of the day, when caregivers are already tired. A question families often ask is simply: what stage of dementia does this happen in?

The short answer

Sundowning is most common during the middle, or moderate, stage of dementia. That is the stage when memory loss and confusion have progressed beyond the early phase but the person is still active and mobile, the combination that makes late-day agitation most noticeable. That said, sundowning does not follow a strict schedule: some people show signs in the early stage, and for others it continues into the later stages.

In other words, sundowning is best understood as a pattern that can appear across stages but peaks in the middle, rather than a symptom locked to one phase.

What sundowning looks like

As daylight fades, you might notice:

• Increased confusion, restlessness, or pacing
• Anxiety, irritability, or sudden anger
• Suspicion or seeing/hearing things that are not there
• Wanting to leave or 'go home,' even when already home
• Difficulty settling down for the night

Why it happens

There is no single cause, but several factors stack up at the end of the day:

• Fatigue. A tired brain has fewer resources to manage confusion.
• Disrupted internal clock. Dementia can damage the brain's sleep-wake regulation, scrambling the body's sense of time.
• Light and shadows. Fading light and longer shadows make a room harder to interpret, which feeds fear and misperception.
• Unmet needs. Hunger, pain, needing the bathroom, or boredom often show up as agitation.
• Overstimulation. A busy, noisy end-of-day household can overwhelm someone who is already struggling to process.

How to ease sundowning

You cannot always prevent it, but a few consistent changes genuinely help:

• Keep a predictable routine. Same wake time, meals, and bedtime every day, predictability is calming.
• Brighten the late afternoon. Turn lights on before dusk and close blinds to reduce confusing shadows.
• Protect the evening. Plan the most demanding activities for the morning and keep evenings quiet and low-key.
• Watch food and naps. Limit caffeine and sugar later in the day, and keep daytime naps short so nighttime sleep holds.
• Stay calm and reassuring. Arguing or correcting tends to escalate; a gentle, steady presence helps more than logic.

If certain medications seem to worsen evening confusion, it is worth reviewing them with a doctor, our guide on medications that can cause sundowning covers this in more detail. And if you are noticing other shifts, you may find our piece on whether dementia can come on suddenly helpful.

The end of the day is often the hardest stretch for families living with dementia. Trained caregivers can take on those hours, bringing the structure, patience, and steady presence that calm sundowning. DavidStar Home Care provides specialized Alzheimer's and dementia care across Broward County, including support during the difficult evening hours. You do not have to face sundown alone.