The days grow shorter, the mornings turn dark, and something inside you slows down. You may find yourself sleeping more, pulling away from people you love, or feeling a heaviness that was not there in July. If this pattern returns year after year, you are not imagining it, and you are not alone. Seasonal mood changes are real, well studied, and treatable.
What Are Seasonal Mood Changes?
Many people notice that their energy and outlook shift with the seasons. For some, this is a mild case of the "winter blues." For others, it becomes seasonal affective disorder (SAD), a form of major depression that follows a seasonal pattern. Symptoms typically begin in late fall or early winter and ease in spring, although a smaller number of people experience the reverse, with symptoms appearing in spring or summer.
Common signs include persistent low mood, loss of interest in activities, low energy, oversleeping, changes in appetite (especially craving carbohydrates), difficulty concentrating, irritability, and feelings of hopelessness or worthlessness.
Who Is Affected?
Seasonal depression can affect anyone, but it is more commonly diagnosed in adult women than in men, and it often begins in young adulthood. People who live farther from the equator, where winter daylight is shorter, tend to be affected more often. A personal or family history of depression, bipolar disorder, or SAD also raises the likelihood. Having seasonal symptoms does not mean you are weak or doing something wrong. It reflects how your body and brain respond to environmental change.
What Does the Research Say?
Researchers believe several factors work together. Reduced sunlight can disrupt the body's internal clock, known as the circadian rhythm, which influences sleep, hormones, and mood. Less light may also affect serotonin, a brain chemical involved in mood regulation, and increase production of melatonin, which promotes sleepiness. Lower vitamin D levels have also been studied, though the evidence that supplements treat SAD is mixed.
Evidence-based treatments include light therapy, cognitive behavioral therapy adapted for SAD, medication, and lifestyle changes. Studies have found that cognitive behavioral therapy can produce lasting benefits, and that bright light therapy can help many people when used consistently and correctly.
Practical Ways to Cope
Small, consistent habits can make a meaningful difference, especially when started early in the season:
- Get outside within an hour or two of waking, even on cloudy days, since morning daylight helps anchor your body clock.
- Keep a steady sleep schedule, going to bed and waking at consistent times.
- Move your body most days. A brisk walk counts, and exercise has been shown to support mood.
- Stay connected. Plan regular contact with friends or family, even when you feel like withdrawing.
- Eat regular meals and notice cravings for heavy carbohydrates without judging yourself.
- Break big tasks into small steps so low energy does not turn into overwhelm.
Light Therapy and Other Treatments
Light therapy uses a special lamp that provides bright light, usually 10,000 lux, while filtering harmful ultraviolet rays. It is often used for a set time each morning. Because light therapy can affect people with certain eye conditions or bipolar disorder, it is wise to talk with a clinician before starting. Psychotherapy helps you notice and change unhelpful thought patterns and build activities that keep you engaged. Medication, such as antidepressants, may also be appropriate for some people, and a qualified professional can help you weigh the options.
When to Seek Professional Help
Consider reaching out if your symptoms last more than a couple of weeks, interfere with work, relationships, or daily life, or if you are using alcohol or other substances to cope. If you have thoughts of harming yourself or ending your life, seek help immediately by calling or texting 988, the Suicide & Crisis Lifeline, or by calling 911.
You do not have to wait for spring to feel better. If the changing seasons are weighing on you, Blue Willow Psychiatry in Tooele, UT is here to talk. Call (435) 200-3430 or visit our contact page to start the conversation.