As the clocks fall back and the days grow shorter, many Canadians notice a shift in their mood and energy. But for children and youth, the change in season can bring challenges that are harder to name—and harder to navigate alone.
Winter in Canada is not just cold. It’s dark. For months, many of us leave for school or work in the dark and return home in the dark. And while the "winter blues" are a common experience, for some young people, the seasonal shift can trigger something more serious.
This post explores how seasonal changes influence child and youth mental health, what to watch for, and how parents and caregivers can help—with scenarios to illustrate what this can look like in real life.
The Winter Blues vs. Seasonal Affective Disorder
It is important to distinguish between a mild seasonal slump and a clinical condition.
The "winter blues" are a mild form of seasonal mood change. In Ontario, research suggests that about 15% of the general population have experienced the winter blues. It might look like feeling a bit more tired, a bit less motivated, or a bit more irritable during the darker months.
Seasonal Affective Disorder (SAD) is different. It is a serious form of depression that affects about 2 to 3% of people living in Canada. SAD follows a seasonal pattern—most commonly occurring in fall and winter—and can significantly impair daily functioning.
Children and adolescents are not immune. While SAD is more commonly diagnosed in young adults, children and youth can experience it too, and it often emerges around puberty.
Reduced Daylight and the Biology of Mood
Why does less sunlight affect mood?
The answer lies in our biology. Sunlight plays a key role in regulating our body's internal clock—the circadian rhythm that governs sleep and wake cycles. It also influences the brain's production of melatonin and serotonin. During the darker months, Decreased sunlight exposure disrupts melatonin and serotonin production, which can contribute to depressive symptoms.
Melatonin helps regulate sleep, while serotonin helps regulate mood. When the balance shifts, teenagers may oversleep or struggle to wake up for school. They may feel more irritable, more tired, and less motivated.
The cold weather and early darkness also limit outdoor activities and social interactions. When children and youth spend more time indoors and less time with friends, feelings of isolation and low energy can intensify.
These factors can lead to a noticeable drop in academic performance and concentration.
This is not a matter of willpower. It is biology.
The Compounding Weight of Academic Stress
The shift to late autumn coincides with heavier school workloads, exam stress, and the loss of unstructured outdoor time and social opportunities. Together, these factors can deepen winter depressive symptoms.
For many young people, the season and the school year are moving in the same direction at once: both getting heavier.
Scenario: The Teen Who Can’t Wake Up
The Situation: It is mid-November. Jennifer's 15-year-old son, Marcus, has always been a decent student. But over the past month, his grades have slipped. He is late for school almost every day, snapping at Jennifer when she tries to wake him. He comes home and goes straight to his room, skipping dinner with the family. His teachers report he seems "checked out" in class.
What Jennifer Does: Instead of lecturing Marcus about his grades, she waits for a calm moment on the weekend and sits beside him.
"I've noticed you seem really exhausted lately, and you're not yourself. I'm not mad—I'm worried. What's going on?"
Marcus shrugs. "I don't know. I just can't wake up. And everything feels pointless."
Jennifer resists the urge to problem-solve immediately.
"That sounds really hard. I've noticed the days are darker now. Do you think that might be part of it?"
Marcus hadn't connected the two. But when Jennifer names it, something clicks.
"Maybe. I don't know. I just feel heavy."
The Next Step: Jennifer books an appointment with their family doctor. The doctor rules out physical causes like thyroid issues or low vitamin D. She recommends a few strategies: a consistent bedtime routine, a short morning walk to get natural light before school, and a check-in with a counsellor.
The Outcome: Marcus's mood does not lift overnight. But with Jennifer's support, a morning routine that includes stepping outside before school, and regular counselling, he slowly starts to feel more like himself.
The winter is still dark—but he is not carrying it alone.
Scenario: The Child Who Withdraws
The Situation: It is early December. David notices that his 9-year-old daughter, Amara, has stopped asking to play outside with her friends. She used to love building snow forts. Now she comes home from school, curls up on the couch, and asks for snacks—especially bread and pasta—all afternoon. She is quick to tears and snaps at her little brother over small things.
What David Does: At first, he assumes she is just tired. But after two weeks of the same pattern, he sits with her during a quiet moment.
"Amara, I've noticed you haven't wanted to play outside lately, and you seem sadder than usual. I love you, and I want to understand. Can you tell me what's going on inside?"
Amara shrugs. "I don't know. I just feel blah. Everything is boring."
David does not push. He says, "That sounds hard. Sometimes the winter makes people feel blah. It happens to me too, sometimes."
The Next Step: David makes a few small changes. He sets up a reading corner near a sunny window where Amara can do homework. He starts a "morning light walk" before school—just ten minutes around the block, even in the cold. He also restricts screens after dinner and reinstates a consistent bedtime.
The Outcome: Amara does not transform overnight. But over a few weeks, the tears become less frequent. She starts asking to build a snow fort again. And she knows, now, that her feelings are something her dad wants to understand—not something to hide.
What to Watch For: Signs in Children and Youth
Symptoms of SAD in children and youth are similar to those of depression, but they appear during specific times of year—typically late fall through early spring .
Common signs include:
Mood changes: Increased sadness, irritability, or sensitivity to criticism
Energy changes: Feeling tired, lethargic, or heavy; needing more sleep
Appetite changes: Cravings for carbohydrates (bread, pasta, sweets) and possible weight gain
Social withdrawal: Avoiding friends and activities they used to enjoy
Difficulty concentrating: Struggling to focus on schoolwork, which can lead to declining grades
Loss of interest: Not finding pleasure in things that used to be fun
Negative feelings: Hopelessness or low self-worth
For parents, the key is noticing changes in your child's usual demeanor. Not every child will show every symptom. What matters is whether the shift feels significant and whether it follows a seasonal pattern.
Proactive Management Strategies for Families
1. Maximize Light Exposure
Encourage your child to spend time outdoors during daylight hours, even when it is cold. Open curtains during the day. Move a desk or reading chair near a window. A short daily walk in the morning—even ten minutes—can help regulate the body's internal clock and improve mood.
2. Implement "Small Resets"
Instead of forcing major lifestyle alterations, help youth stick to minor routines. Strict screen-time boundaries. Consistent bedtimes. A predictable morning routine.
3. Practice Behavioural Activation
Gently encourage youth to engage in hobbies, see friends, or move their bodies even when their energy levels pull them to do the opposite.
4. Maintain Social Connection
The colder months can isolate families. Keep sleep schedules consistent. Encourage your child to stay connected with friends. Join clubs or activities they enjoy.
5. Seek Clinical Supports
Talk to your family doctor or pediatrician about these possible treatments:
Light Therapy: Using a specialized 10,000-lux lamp for 30 minutes a day, usually in the morning. This should be done under professional guidance.
Cognitive Behavioural Therapy (CBT): Talk therapy can help children and youth process their feelings and develop coping strategies.
Medication: In some cases, medication may be recommended.
6. Talk About It
Normalize the conversation. Let your child know that feeling different during the darker months is common and that it is okay to talk about it. Listen without judgment.
7. Take Care of Yourself Too
Supporting a child through a difficult season takes energy. You cannot pour from an empty cup. Prioritize your own mental health and reach out for support if you need it.
A Final Thought
The winter months are not something we can control. But we can control how we respond to them—as individuals, as families, and as a community.
For children and youth, the darkest months of the year do not have to be the hardest. With awareness, support, and connection, they can navigate the season with resilience. And they can learn something important along the way: that hard seasons pass, that help is available, and that they are not alone in the dark.
If you or someone you know is in crisis, help is available 24/7:
Suicide Crisis Helpline: Call or text 9-8-8
One Stop Talk: Connect directly with a mental health professional ( Monday to Friday from 12 p.m. to 8 p.m.) through online video, and voice. Go to onestoptalk.ca or call 1-855-416-8255.
Kids Help Phone: 1-800-668-6868 or text CONNECT to 686868
Lynwood Charlton Centre: Contact our Access and System Navigation team at 905-389-1361 for free, confidential mental health support for children, youth, and families in Hamilton
You are not alone.
RESOURCES
Connex Ontario Supporting Clients Through Seasonal Mental Health Transitions
KidsHealth.org Seasonal Affective Disorder (SAD)
Canadian Mental Health Association Seasonal Affective Disorder
Lakehead University 4 Ways the Changing Seasons can Affect your Mental Health
