Seasonal Affective Disorder and Winter Depression

As the days grow short, some people feel their mood dim with them. Here’s what seasonal depression is — and what actually helps.

For some people, the arrival of shorter, darker days brings more than a case of the winter blahs. Seasonal affective disorder (SAD) is a recognized form of depression that follows a seasonal pattern, most often arriving in fall and winter and lifting in spring. Along Colorado’s Front Range, where winters are long, it’s worth understanding.

What SAD looks like

SAD is more than feeling a bit sluggish. It’s a genuine depression with a seasonal rhythm, and winter-pattern symptoms often include low energy, oversleeping, carbohydrate cravings and weight gain, social withdrawal, and a heavy, low mood that shows up around the same time each year. Estimates of how many adults are affected vary with the definition used, but it’s common enough that most of us know someone who feels the season change in their mood.

Why it happens

The leading explanation involves reduced sunlight in shorter days, which can disrupt your internal clock (circadian rhythm) and the brain chemistry tied to mood and sleep. Less light, in short, can nudge a vulnerable brain toward depression.

What actually helps

The good news is that SAD is treatable, and first-line options are well established. Bright light therapy — typically a 10,000-lux light box used for about 30 minutes after waking — helps many people within days to weeks. Cognitive behavioral therapy and antidepressants are also effective, alone or in combination, and the best choice often comes down to your preferences and history.

When it’s more than seasonal

For some people, winter depression is severe or layered on top of year-round depression that hasn’t responded to standard care. In those cases, interventional options used in psychiatry — including rapid-acting treatments like ketamine — may be worth discussing. That’s a conversation for a clinician who can look at your full picture, not a first step for milder seasonal dips.

The bottom line

If your mood reliably sinks with the seasons, you’re not imagining it, and you don’t have to just wait for spring. Effective treatments exist — and help is worth seeking before the dark months set in.

Curious whether this could be a fit for you? Refound Center offers clinician-led care in the North Denver to Fort Collins area. Reach out to schedule a consultation and we’ll talk through your history and options together.

Medical disclaimer

This article is for general educational purposes only and is not medical advice, diagnosis, or treatment. Ketamine therapy is not appropriate for everyone. Talk with a qualified clinician about your history, medications, and goals before starting any treatment. If you are in crisis or thinking about harming yourself, call or text 988 (the Suicide & Crisis Lifeline) in the U.S.

Sources & further reading:

Kurlansik SL, Ibay AD. Seasonal affective disorder: common questions and answers. American Family Physician (AAFP), 2020. https://www.aafp.org/pubs/afp/issues/2020/1201/p668.html