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When the days grow shorter and the sky over New York City turns dark by late afternoon, some teenagers seem to dim along with the light. Energy drops, mood sinks, sleep stretches longer, and the things they normally enjoy stop feeling worth the effort. If this happens around the same time every fall and lifts in spring, it may be more than a winter slump. It may be seasonal depression.
Seasonal depression, clinically known as seasonal affective disorder or SAD, is a real and treatable form of depression that follows a seasonal pattern. According to the National Institute of Mental Health, about 5 percent of adults in the United States experience SAD, and younger people are at higher risk, with the condition often first appearing during the teen years.
Source: https://www.nimh.nih.gov/health/publications/seasonal-affective-disorder
This guide explains the symptoms, causes, and treatment options for seasonal depression, and how adolescent mental health support delivered through telehealth helps. At Mount Behavioral Health, we provide this care for ages 9 to 21 across all five boroughs of NYC.
Seasonal affective disorder is a form of depression that follows a seasonal pattern, most often beginning in the late fall or early winter and easing in the spring and summer. It is not a separate illness so much as a specific timing pattern of major depression, which is why it can be just as serious as depression that occurs at any other time of year.
Because the symptoms arrive gradually and overlap with ordinary winter fatigue, seasonal depression in adolescents is frequently missed or dismissed as moodiness. The defining feature is the seasonal rhythm. If a young person's mood reliably dips at the same time each year and recovers when the days lengthen, that pattern itself is an important clue.
Seasonal depression can be especially hard to spot in adolescents, because some of its hallmark symptoms look a lot like normal teenage behavior. The key is the seasonal pattern combined with the degree to which symptoms interfere with daily life. Common signs of winter pattern seasonal depression in teens include the following.
• Persistent low mood that lasts most of the day, nearly every day, for weeks during the fall and winter.
• Loss of interest or pleasure in activities, friends, or hobbies they normally enjoy.
• Low energy and daytime sleepiness, often paired with sleeping much more than usual and difficulty getting up for school.
• Increased appetite and carbohydrate cravings, sometimes with weight gain over the winter.
• Difficulty concentrating, which can show up as slipping grades or trouble completing schoolwork.
• Irritability, withdrawal, or feelings of hopelessness, guilt, or worthlessness.
When these symptoms are severe, persist for more than two weeks, or include any talk of self harm, it is time to seek professional help right away.
For most people with seasonal depression, the trigger is the reduction in natural daylight during the darker months. Shorter days and longer nights can disrupt the body's internal clock and alter the brain chemicals that regulate mood and sleep.
People with winter pattern SAD tend to have reduced levels of serotonin, the neurotransmitter that helps regulate mood, along with changes in melatonin, the hormone that governs the sleep and wake cycle. Together these shifts can throw off a teen's daily rhythm and pull their mood down. In a dense, fast paced environment like New York City, the effect can be amplified by short winter days, long stretches indoors, and reduced time outside in natural light.
Because seasonal depression has both a biological and a psychological component, the most effective treatment plans usually address both. Here are the main evidence based options for adolescents.
• Light Therapy: A light box that simulates bright outdoor light is one of the first line treatments for winter pattern SAD. Most people use it for about 20 to 30 minutes each morning, and many notice improvement within one to four weeks. For a teen, light therapy should be started with guidance from a clinician.
• Cognitive Behavioral Therapy: CBT adapted for SAD helps teens challenge the negative thinking that takes hold in winter and re-engage with activities they have withdrawn from. Because it builds durable skills, it can reduce the severity of future seasons.
• Lifestyle Strategies: Getting as much natural daylight as possible, staying physically active, keeping consistent sleep times, and managing stress all help stabilize mood.
• Medication: When seasonal depression is moderate to severe, a psychiatric provider may recommend an antidepressant, typically an SSRI, prescribed and monitored carefully and used alongside therapy.
The right combination depends on the individual teen, which is why treatment begins with a comprehensive assessment.
Telehealth is a particularly good fit for treating seasonal depression in adolescents. When a teen is already low on energy and motivation during the winter months, the prospect of bundling up and commuting to an office can be enough to derail treatment altogether.
Online mental health therapy removes that obstacle. Your teen can connect with a therapist from the warmth and privacy of home, which makes consistent attendance far more realistic during exactly the season when showing up feels hardest. Research has shown that virtual mental health services can be just as effective as in person sessions for many young people, particularly for depression and anxiety.
At Mount Behavioral Health, our clinicians provide teen mental health support for adolescents ages 9 to 21 across Brooklyn, Queens, Manhattan, the Bronx, and Staten Island. We accept most major insurance plans, including Medicaid.
Professional care is essential, and your support at home makes a real difference through the darker months. A few practical strategies help.
• Maximize daylight. Encourage time outside during daylight hours, sitting near windows, and keeping living spaces bright.
• Protect routines. Consistent sleep, balanced meals, and regular activity are powerful tools against seasonal depression.
• Keep communication open. Encourage your teen to talk about how they feel without judgment, and simply be present and available.
• Watch for the pattern. If you have seen this happen in past winters, plan ahead, since starting treatment early in the fall can prevent symptoms from deepening.
• Care for yourself, too. Supporting a teen through depression is demanding, so seek your own support.
Many New York State insurance plans, including Medicaid, cover telehealth mental health services, and our team can help you verify your benefits. NYC public schools also offer support through counselors and psychologists who can provide initial help. It is important to know crisis resources across the five boroughs. NYC 988 (call or text 988) offers 24/7 support, and the Crisis Text Line (text HOME to 741741) is available nationwide. For trusted background information, families can turn to the American Psychiatric Association.
Seasonal depression is a real and serious condition, but it is also one of the most treatable forms of depression. With the right combination of support, including therapy, light, healthy routines, and sometimes medication, most teens move through the winter months with their wellbeing intact and head into spring feeling like themselves again.
At Mount Behavioral Health, we provide compassionate, evidence based adolescent mental health support to families across all five boroughs of New York City. Our telehealth model makes online mental health therapy convenient and effective, so your teen can get the care they need from the comfort of home, even on the darkest days of winter.
• If you believe your teen could benefit from support for seasonal depression, we invite you to reach out.
• Scheduling a consultation is easy through our online booking options.
• Our team can also help verify your insurance, making the process as straightforward as possible.
For immediate crisis support, please remember these vital resources:
NYC 988: Call or text 988
National Suicide Prevention Lifeline: Call or text 988
Crisis Text Line: Text HOME to 741741
Call us at 718-400-0545 or visit mountbh.org to schedule your teen's first session.
1. How is seasonal depression different from regular depression?
Seasonal depression follows a predictable seasonal pattern, most often starting in late fall or winter and lifting in spring. The symptoms themselves overlap heavily with major depression, including low mood, loss of interest, and changes in sleep and appetite. The defining feature is the timing. If your teen's symptoms reliably appear and recede with the seasons, that pattern points toward SAD, and it should be taken just as seriously as depression at any other time of year.
2. Can teenagers really get seasonal affective disorder?
Yes. SAD often first appears during the teen years, and younger people are actually at higher risk than older adults. It can be easy to miss in adolescents because symptoms like sleeping more, low energy, and irritability resemble ordinary teenage behavior. The clue is the seasonal rhythm and the degree to which symptoms interfere with school, friendships, and daily life. If you notice the same dip happening each winter, it is worth having your teen evaluated.
3. Does light therapy work for teens, and is it safe?
Light therapy is one of the first line, evidence based treatments for winter pattern SAD, and many people notice improvement within one to four weeks of consistent morning use. For a teenager, light therapy should be started under the guidance of a clinician who can advise on the right timing, intensity, and duration, and who can rule out any reasons it might not be appropriate. It is often combined with therapy and, in more severe cases, medication.
4. Is online therapy effective for treating seasonal depression?
Research indicates that virtual mental health services can be just as effective as in person sessions for many young people, particularly for depression and anxiety. For seasonal depression specifically, telehealth offers a real advantage. When a teen's energy and motivation are low during the winter, being able to connect from home makes consistent attendance far more achievable. Our therapists are experienced at delivering CBT and other evidence based approaches through a secure video platform.
5. When should we seek help for seasonal depression?
If your teen's low mood, withdrawal, or fatigue lasts more than two weeks, interferes with school or relationships, or recurs every winter, it is time to reach out. Seek help right away if there is any talk of self harm or hopelessness. Because seasonal depression is predictable, there is also a real benefit to acting early. Starting treatment in the fall, before symptoms deepen, can make the whole season easier. A comprehensive assessment is the first step toward the right plan.
