Memory Care
Sundowning: Why Late Afternoon Is the Hardest Time of Day
If your loved one becomes restless, anxious, or confused as the sun sets, you're not imagining it. Here's the science — and what helps.
Families describe it the same way: 'She's fine in the morning. By 4 p.m., she's a different person.' Restlessness, pacing, repeated questions, sometimes anger or tears as the daylight fades.
This pattern is called sundowning, and it affects up to two-thirds of people with Alzheimer's at some point in the disease.
What causes it
The leading theory is circadian rhythm disruption. Dementia damages the brain's internal clock, so the cues that normally tell us 'evening is coming, wind down' get scrambled. Add fatigue from a long day of cognitive effort, lower light levels, and shadows that the brain can no longer interpret correctly — and the result is anxiety with no clear source.
What helps
Bright light exposure in the morning, ideally outside or near a sunny window for 30+ minutes, helps reset the circadian clock. So does a consistent daily rhythm — meals, rest, and activity at the same times every day.
In the late afternoon, dim the noise instead of the lights. Turn off the TV news. Put on familiar music from their youth. Offer a warm drink. Move difficult tasks (bathing, doctor calls) to mornings when reserves are higher.
When to call for help
If sundowning includes hallucinations, aggression, or wandering attempts, talk to the primary care physician about underlying causes — UTIs, pain, and medication side effects can all amplify it. And consider professional caregiver coverage during the hardest hours: 3 p.m. to 7 p.m. is the most common shift our families request.
When you're ready, we're here.
A free in-home assessment with one of our care managers — no pressure, no obligation. Just an honest conversation about what would actually help.