What Stage of Dementia Is Sundowning Most Common?

If your loved one becomes more confused, restless, or agitated in the late afternoon or early evening, you are not alone. These changes, commonly referred to as sundowning, can be one of the most distressing symptoms of dementia for families to manage. Many caregivers find themselves asking the same question: what stage of dementia is sundowning most common?

Sundowning can disrupt nighttime sleep, increase safety concerns, and leave families feeling unsure about what the behavior means. Understanding when sundowning typically occurs, why it happens, and how it relates to dementia stages can help families make informed, compassionate care decisions as cognitive decline progresses.

Sundowning, sometimes called sundown syndrome, refers to a pattern of behavioral and psychological symptoms that worsen during the late afternoon, early evening, and evening hours. These symptoms may include increased confusion, agitation, anxiety, pacing, restlessness, or emotional distress.

According to the National Institute on Aging, sundowning is associated with changes in the brain that affect communication, reasoning, and the ability to cope with stress later in the day. As dementia progresses, disruptions to the sleep-wake cycle can interfere with nighttime sleep and increase agitation during evening hours.

Although sundowning can occur at various points, it is most commonly seen during middle-stage dementia, particularly in individuals living with Alzheimer’s disease. However, sundowning is not limited to one specific stage, and its presence does not automatically indicate severe dementia.

Can Sundowning Happen in Early-Stage Dementia?

Yes, sundowning can happen in early-stage dementia, although symptoms are often mild and less frequent. Individuals in the early stage may still be aware of their cognitive decline, which can increase anxiety and frustration as the day comes to an end.

Early sundowning may be influenced by fatigue, sleep disruption, excessive daytime naps, or changes in routine. At this stage, symptoms often appear as irritability, unease, or difficulty settling in the evening rather than intense agitation.

Sundowning in Middle-Stage Alzheimer’s

Sundowning in middle-stage Alzheimer’s is when symptoms most often become noticeable and disruptive. As cognitive decline increases, the brain has more difficulty interpreting environmental cues such as lighting changes, background noise, and daily transitions.

The Alzheimer’s Association notes that as memory loss and communication challenges progress, individuals may struggle to understand their surroundings, which can lead to increased agitation and confusion during the evening hours. During this stage, families may notice pacing, resistance to care, emotional outbursts, or heightened anxiety later in the day.

Is Sundowning a Sign of Late-Stage Dementia?

A common concern is whether sundowning is a sign of late-stage dementia. Not necessarily. While sundowning can occur in severe dementia, it is not exclusive to the final stage of the disease.

In later stages, sundowning may involve more physical restlessness, limited verbal expression, or longer recovery times after episodes. However, the presence of sundowning alone does not mean that dementia has reached a late stage.

There is no single timeline for when sundowning starts in dementia. Some individuals experience symptoms early, while others develop them later as dementia progresses.

Several risk factors may contribute, including sleep disruption, reduced exposure to natural light, underlying conditions such as sleep apnea, medication side effects, and changes in daily routine. Because these factors vary widely, sundowning can look different from person to person.

Understanding why dementia patients get agitated at night can help caregivers respond with patience and reassurance. Common contributors include:

• Disruption of the body’s internal clock
• Poor nighttime sleep combined with daytime fatigue
• Difficulty interpreting shadows or low lighting
• Overstimulation earlier in the day

As cognitive decline advances, the brain struggles to adapt to transitions. Evening hours can feel confusing or overwhelming, which often leads to agitation and anxiety.

Families often ask, ” Does sundowning mean dementia is getting worse? The answer depends on the pattern and frequency of symptoms.

Sundowning does not always signal rapid decline. Temporary increases may be triggered by illness, stress, environmental changes, or poor sleep. However, if sundowning episodes become more frequent, more intense, or harder to manage, they may reflect progression through the dementia stages. Tracking these changes and discussing them with healthcare providers can provide valuable insight.

Many caregivers wonder how long the sundowning stage lasts. Sundowning is not a formal dementia stage but rather a symptom pattern that can come and go.

Its duration depends on several factors, including how dementia progresses, the quality of nighttime sleep, the consistency of daily routines, and the level of support provided. With structured routines and appropriate care, some individuals experience fewer or less intense episodes over time.

While sundowning cannot always be prevented, it can often be managed with consistent strategies. These may include maintaining predictable daily schedules, limiting long daytime naps, encouraging exposure to natural light, and creating calm evening routines.

At Cedar Creek memory care homes, structured routines and calm environments are built into daily life to help reduce evening agitation and confusion. This approach aligns closely with Cedar Creek’s care philosophy, which emphasizes dignity, consistency, and personalized support for individuals living with dementia.

Sundowning can be emotionally exhausting for both individuals living with dementia and the families who care for them. When evening behaviors begin to affect safety, sleep, or overall quality of life, additional support may be helpful.

For families exploring memory care options in Maryland, Cedar Creek offers several small, home-like residences, including Auxiliary House in Bethesda, Cedar Glen and Maple Ridge in Rockville, Hillwood in Bethesda, and Clifton Woods in Silver Spring. Each residence is designed to support comfort, routine, and safety as dementia progresses.

Families can also speak with a care team to discuss evening behaviors, safety concerns, and whether additional support may be helpful.

• Alzheimer’s Association. (n.d.). Sleep issues and sundowning. https://www.alz.org/help-support/caregiving/stages-behaviors/sleep-issues-sundowning
• National Institute on Aging. (n.d.). Coping with agitation, aggression, and sundowning in Alzheimer’s disease. https://www.nia.nih.gov/health/alzheimers-changes-behavior-and-communication/coping-agitation-aggression-and-sundowning