Seasonal depression: when shorter days affect mood and motivation

Reviewed by Dr. Brittany Ryan-Berzins, PhD — licensed clinical psychologist with 20+ years of experience treating anxiety, depression, and trauma.

When daylight fades earlier and routines shift indoors, many people notice changes in mood, sleep, appetite, and energy. For some, those changes become persistent and start to interfere with daily life. This is often called seasonal depression or seasonal affective disorder (SAD), a type of depression that tends to return during the same season each year.

woman looking out the window

At Birch Tree Psychology, we offer evidence-based care for children, teens, and adults with an approach that is both compassionate and results-focused. If winter tends to feel heavier for you or your child, support can make a meaningful difference.

What seasonal depression can look like

Seasonal depression does not always feel like sadness. It can show up as feeling flat, disconnected, irritable, or simply “not yourself.” Common signs include:

  • Lower mood most days

  • Loss of interest in activities that usually feel good

  • Low energy, slower pace, or persistent fatigue

  • Sleeping more than usual, or struggling to wake up

  • Changes in appetite, often increased cravings

  • Difficulty focusing or feeling mentally foggy

  • Feeling guilty, hopeless, or stuck

In kids and teens, signs may be easier to miss

Children and teens do not always have the words to describe depression. You may notice:

  • Increased irritability, tearfulness, or emotional shutdown

  • More conflict at home, school refusal, or slipping grades

  • Pulling away from friends or activities

  • More anxiety, reassurance-seeking, or rigid routines

Why symptoms often increase in fall and winter

Seasonal depression is often linked to reduced light exposure. Less morning light can affect the body’s internal clock, sleep patterns, and mood regulation. For many people, that shift builds gradually, so symptoms can feel confusing at first. You might wonder why everything feels harder even though “nothing is wrong.”

Practical steps that can help

These are not a substitute for treatment, but they are solid starting points. Small changes, repeated consistently, can support mood.

1) Prioritize morning light

If possible, try to get outdoor light earlier in the day. Even a short walk can help support a steadier sleep-wake rhythm.

2) Keep sleep routines predictable

Seasonal depression can pull people toward late mornings and long naps. A consistent wake time tends to be more stabilizing than trying to force an early bedtime.

3) Choose “doable” movement

You do not need an intense workout for movement to help. A gentle routine you can repeat matters more than pushing too hard once.

4) Add structure and connection

When mood drops, isolation often increases. Consider one or two realistic anchors each week, such as a class, a standing coffee date, or a family routine you can maintain.

5) Watch for all-or-nothing thinking

Seasonal depression often comes with harsh self-talk, like “I’m falling behind” or “I should be able to handle this.” Therapy can help you recognize these patterns and respond with more effective coping tools.

Evidence-based treatment options for seasonal depression

Seasonal depression is treatable. Many people benefit from a combination of skills-based therapy, lifestyle supports, and sometimes light-based or medication options. Treatment is not one-size-fits-all, and the right plan depends on symptoms, history, and day-to-day demands.

Therapy

Therapy can help you understand what is driving symptoms and build strategies that fit your life. At Birch Tree Psychology, we tailor care to each client’s goals, personality, and developmental stage. Depending on needs, your clinician may draw from:

  • CBT to address depressive thought patterns and behavior cycles

  • DBT skills for emotion regulation and distress tolerance

  • ACT to reduce avoidance and build values-based action

  • MBCT to support mindfulness and relapse prevention

  • Trauma-focused therapy when past experiences intensify seasonal symptoms

  • Play therapy and art therapy for children who communicate best through play and creativity

  • Gottman Method approaches when depression impacts communication and closeness in a relationship

Light therapy and medication

Some clients explore light therapy or medication as part of care, particularly when symptoms are recurring or significantly impairing. These options are best discussed with a qualified clinician who can consider your full health picture.

When it may be time to reach out

Consider getting support if:

  • Symptoms last more than two weeks and disrupt daily life

  • The same pattern returns each year

  • School, work, parenting, or relationships feel increasingly hard to manage

  • You feel numb, stuck, or like you are withdrawing from life

Support that matches your needs

Birch Tree Psychology is a group practice in Pompton Plains, New Jersey, co-founded by Dr. Brittany Ryan-Berzins and Dr. Peter Berzins. Our multidisciplinary team provides targeted, evidence-based therapy for children, teens, adults, and couples. We prioritize thoughtful matching so that care fits the person, not just the diagnosis.

Seasonal depression can be isolating, but you do not have to push through it alone. With the right support and practical tools, many people feel steadier, more energized, and more like themselves again.

Reviewed by Dr. Brittany Ryan-Berzins, PhD.

Dr. Ryan-Berzins is a licensed clinical psychologist and co-founder of Birch Tree Psychology. She holds a PhD in clinical psychology from Fordham University and completed advanced clinical training at Lenox Hill Hospital, the New York Psychoanalytic Institute, Bellevue/NYU’s Program for Survivors of Torture, and the Veterans Affairs New Jersey Healthcare System.

Her clinical work focuses on anxiety, depression, trauma, life transitions, and women’s mental health using evidence-based, mindfulness-informed care.