What is sundowning?
Sundowning is a pattern of increased confusion, agitation, and behavioral changes that typically occur in the late afternoon or evening in people with dementia or cognitive decline.
In aged care settings across London, Ontario, sundowning refers to a predictable shift in behavior and mental clarity that typically emerges in the late afternoon or evening hours among residents with dementia or advanced cognitive decline. Affected individuals may become agitated, restless, disoriented, or withdrawn as daylight fades, sometimes showing marked differences from their daytime presentation.
This phenomenon can include wandering, increased confusion about time and place, verbal or physical agitation, difficulty following directions, and heightened anxiety or suspicion. The exact cause remains unclear, though researchers point to circadian rhythm disruption, reduced visual cues in dimming light, fatigue accumulating through the day, and changes in the brain associated with dementia itself.
For care homes and retirement residences, sundowning has direct implications for staffing and programming. Many facilities adjust their evening shift plans around these patterns, increasing staffing during peak sundowning hours and modifying activity schedules to suit residents' fluctuating capacity. Environmental changes, such as improved lighting and quiet, structured routines before evening, often help reduce severity. Understanding sundowning helps staff respond with appropriate patience and adapted care rather than treating escalated behavior as willful or unmanageable.
Facilities offering memory care services in the London area recognize sundowning as a normal part of advancing dementia and design routines and staff allocation accordingly.