When winter sets in and daylight fades, employees may begin to feel the effects of Seasonal Affective Disorder (SAD), a form of depression triggered by reduced sunlight and shifting biological rhythms.

SAD can affect workplace morale, productivity, safety and overall employee well‑being. Fortunately, employers can play a proactive role in helping workers navigate this seasonal challenge with compassion and practical support.

What is SAD

Seasonal Affective Disorder is a type of depression tied to seasonal changes as daylight decreases. Symptoms can include persistent low mood, fatigue, oversleeping, difficulty concentrating, irritability, changes in appetite, and social withdrawal, according to the Mayo Clinic .

These symptoms can impact workplace performance, leading to decreased productivity, higher absenteeism, increased errors and strained team relationships.

How SAD affects the workplace

According to the Washington State Department of Labor & Industries , there are several ways in which SAD can negatively affect the workplace, including:

• Employee job performance and productivity
• Overall engagement with work
• Poor communication with coworkers
• Reduced physical capability and daily functioning

The department encourages employers to exercise habits that can help prevent SAD, such as getting enough sleep, seeking sunlight (including a light-therapy lamp), maintaining strong relationships, eating well and asking for help.

While the Mayo Clinic says that there is no known way to prevent the onset of SAD, there are measures people can take to manage symptoms and prevent them from getting worse as winter wears on.

In addition to the items listed by Washington State officials above, Corporate Wellness Magazine reports other steps employers can take to combat SAD among employees:

• Offer flexible hours or remote work options: Doing so can help workers manage their own exposure to natural light and reduce stress.
• Encourage physical activity: Exercise can help reduce stress and boost energy levels.
• Provide support for mental health: Giving employees access to mental health professionals can help workers deal with a variety of issues.

It should also be noted that symptoms of SAD are not compensable for work comp in SFM’s core states.

Why employer support matters

Supporting employees with SAD is not only compassionate, it’s also good for business. Addressing SAD reduces absenteeism, prevents burnout, improves collaboration and supports a more engaged and productive workforce.

Employers who proactively address mental health challenges build workplaces where people feel valued, supported and able to do their best work year‑round.