Seasonal Affective Disorder in New Jersey and New York: Symptoms, Causes, and Treatment That Works

The clocks go back on Sunday, November 1 this year, and by the second week of December the sun sets before 4:30 in the afternoon across northern New Jersey and the New York metro area. For most people that is an inconvenience. For a meaningful minority it is the start of a depression that will run until March, the same way it did last year and the year before. That pattern has a name, seasonal affective disorder, and most people who have it have never been told so.

This post replaces three older articles on this site about seasonal depression and the winter blues. It covers what seasonal affective disorder is, how to tell it from an ordinary dip in mood, why the winters here bring it on, what treatment looks like, and the point at which it is time to see a psychiatrist rather than wait for April.

What is seasonal affective disorder?

Seasonal affective disorder is a form of major depressive disorder in which the episodes follow a seasonal pattern, returning at roughly the same time each year and remitting when the season changes. Psychiatry no longer treats it as a separate illness; the DSM-5 classifies it as major depression “with seasonal pattern,” which requires the seasonal timing to have held for at least two years with full recovery in between. The National Institute of Mental Health estimates that millions of Americans have it, many without knowing.

The winter pattern is by far the most common: symptoms begin in late fall, deepen through January and February, and lift in spring. A smaller group has the reverse, a summer pattern, which looks different (insomnia, poor appetite, agitation) and is covered in our post on summer depression. The American Academy of Family Physicians puts the prevalence of the condition at about 5 percent of U.S. adults, with symptoms present for roughly 40 percent of the year in those who have it. A larger group has a milder version, often called the winter blues, that does not reach the threshold of a depressive episode but still costs something every year.

What are the symptoms of seasonal affective disorder?

The symptoms of seasonal affective disorder are the symptoms of depression, with a few that are characteristic of the winter pattern. The core of it is a low mood most of the day, nearly every day, for at least two weeks, along with loss of interest in things that normally matter. The winter-specific features are the ones people tend to dismiss as “just winter”:

• Sleeping far more than usual and still waking up tired.
• Craving carbohydrates and sweets, with weight gain over the season.
• Heavy, leaden fatigue that makes ordinary tasks feel physically hard.
• Pulling back from people, cancelling plans, and wanting to stay in.
• Trouble concentrating at work or school.
• Feeling hopeless, worthless, or guilty without a clear reason.
• A mood that reliably improves in spring, and has for more than one year.

The difference between the winter blues and seasonal affective disorder is function. Feeling flatter and slower in January is common and does not need treatment. Missing work, falling behind, withdrawing from the people you love, or thinking that life is not worth the effort is depression, whatever month it happens to be. The American Psychiatric Association’s overview is a good plain-language reference for the full picture.

What causes seasonal depression, and why is it so common here?

Seasonal depression is driven by the drop in daylight, which disrupts the body clock and the brain chemistry that keeps mood steady. Less morning light shifts the circadian rhythm later, so the body is effectively jet-lagged for months. Reduced light also appears to lower serotonin activity and prolong the release of melatonin, the hormone that signals sleep, which fits the oversleeping and sluggishness that mark the winter pattern. Vitamin D plays a role in some people, though less than the supplement aisle suggests.

Northern New Jersey and New York sit at roughly 41 degrees north, far enough from the equator for the December days to be short, cloudy stretches to be long, and the commute to happen in the dark at both ends. Risk is higher in women, in younger adults, in anyone with a family history of depression or bipolar disorder, and in anyone who already has depression that worsens seasonally. Rates rise with latitude, and the metro area is well into the zone where it matters.

One cause deserves its own sentence. A seasonal pattern can be the first visible sign of bipolar disorder, with winter lows followed by spring highs that feel like relief and are not. That possibility is one of the reasons a psychiatrist’s evaluation matters more here than for most depression, because light therapy and some antidepressant treatments can push a person with an unrecognized bipolar pattern in the wrong direction.

How is seasonal affective disorder diagnosed?

Seasonal affective disorder is diagnosed by a clinician who takes a careful history, not by a blood test or a questionnaire alone. The evaluation establishes whether the symptoms meet the threshold for a depressive episode, whether the timing has repeated across at least two years, and whether anything else explains the pattern. Thyroid problems, anemia, sleep disorders, and the natural rhythm of the school or work year can all mimic it.

In our practice at FPT, many of the patients we see for seasonal depression first came in for something else, usually sleep or a general sense of running on empty, and the seasonal shape only became clear when we walked back through the previous two or three winters together. What we hear most often is some version of “it happens every year, so it did not seem like a reason to call.” The yearly pattern is the reason. A psychiatric evaluation takes about an hour, can be done by video, and ends with a plan rather than a label.

How is seasonal affective disorder treated?

Seasonal affective disorder is treated with light therapy, a form of cognitive behavioral therapy adapted for the seasonal pattern, medication when the depression is moderate or severe, or a combination, and treatment is most effective when it begins in October rather than January. Each piece does a different job.

Light therapy uses a bright light box, typically 10,000 lux with the ultraviolet filtered out, for about 20 to 30 minutes each morning shortly after waking. For many people with the winter pattern it works within one to two weeks. It is not a gadget to buy on a whim: timing, distance, and duration matter, it is not appropriate for everyone (anyone with a bipolar pattern or certain eye conditions needs medical guidance first), and it treats the symptom rather than the underlying depression if that depression is more than mild.

Talk therapy addresses the thoughts and habits that deepen the seasonal dip, the withdrawal, the cancelled plans, the idea that nothing can be done until spring. The cognitive behavioral approach developed specifically for seasonal depression has been shown to reduce the chance of the episode returning the following year, which light alone does not do. Our depression therapy page describes how that work goes at FPT.

Medication is appropriate for some people, particularly when the depression is moderate or severe, when it has not responded to light and therapy, or when it comes back hard every year. The decision is individual and is made by a psychiatrist or a board-certified nurse practitioner after an evaluation, often with a plan to start in early fall and taper in spring. Our post on what a psychiatrist actually does for depression explains how that decision gets made.

Vitamin D is worth checking, since deficiency is common in winter at this latitude, but supplementing without a deficiency has not been shown to treat seasonal depression on its own.

Does a light therapy lamp actually work?

Yes, for many people with the winter pattern, light therapy is a genuinely effective treatment, and it is the one most people can start quickly. The evidence supports bright white light at 10,000 lux, used in the morning, with the lamp about an arm’s length away and the eyes open but not staring into it. Smaller “dawn simulator” devices and ordinary household bulbs are not the same thing.

A few practical points from the clinic side:

• Morning timing matters more than total minutes. Light at night can make the body clock later and sleep worse.
• Expect results in one to two weeks. If nothing has changed after a month of consistent use, the depression probably needs more than light.
• Side effects are usually mild: headache, eyestrain, feeling wired. Reduce the session rather than stopping outright.
• Tell your clinician before you start about any past period of unusually high energy, little need for sleep, or racing thoughts. That history changes the plan.
• A lamp is a treatment, not a diagnosis. If the low mood is severe, or you are having thoughts of not wanting to be here, do not wait to see whether the lamp helps. In the United States you can call or text 988 at any hour.

Day to day: what helps during a New Jersey or New York winter

The habits that help are the ones that put daylight, movement, and people back into the day before the mood has a chance to remove them. None of these replace treatment for an actual depressive episode, but all of them reduce the depth of the dip, and they are the first things that go when the dip starts, which is the problem.

1. Get outside within an hour of waking, even for ten minutes. Overcast daylight is still many times brighter than indoor light.
2. Walk at lunch. In December that is the only part of the workday with real sun.
3. Keep a fixed wake time, including weekends. Sleeping in deepens the circadian lag that drives the oversleeping.
4. Move most days. Exercise has an antidepressant effect in its own right, and a gym with windows beats a basement.
5. Plan the social calendar in October, when you still feel like it, so January has commitments already on it.
6. Go easy on alcohol, which worsens both sleep and mood in the weeks that need them most.
7. Start whatever helped last year before the symptoms return, not after. The pattern is predictable; use that.

Our post on the connection between sleep and anxiety goes further on the sleep side, which tends to be where the seasonal pattern first shows.

When should you see a psychiatrist for seasonal depression?

You should see a psychiatrist for seasonal depression when the winter dip is affecting work, relationships, or safety, when it has repeated for two or more years, or when light and self-care have not been enough. Waiting for spring is the default most people choose, and it costs them three or four months a year, every year, that treatment could give back.

Specific signs it is time:

• The same slide has happened at least two winters running.
• You are missing work or school, or getting through them on a fraction of your usual capacity.
• Sleep, appetite, or weight have changed noticeably with the season.
• You have withdrawn from people and stopped doing what you normally enjoy.
• There is a personal or family history of depression or bipolar disorder.
• Any thoughts of hopelessness or of not wanting to be here, even in passing.

The last one does not wait for an appointment. Call or text 988, or go to the nearest emergency room, and then book the follow-up.

What does treatment look like at Family Psychiatry & Therapy?

Treatment starts with an evaluation, by secure video or in person, and most of the care that follows happens by telehealth across New Jersey and New York, which in winter has a particular advantage: no dark commute to a 5 p.m. appointment. In-person visits can be arranged at our Paramus office, and in Edison by arrangement. A first appointment is often available within about a week, which matters when the goal is to get ahead of the season rather than chase it.

The plan might be light therapy with coaching on how to use it, therapy alone, or therapy with medical management when the evaluation points that way. Many patients with a clear seasonal pattern settle into a yearly rhythm: a check-in in early fall, treatment through the winter, a taper in spring. We are in-network with Horizon Blue Cross Blue Shield, Aetna, and Medicare, and most out-of-network plans carry mental health benefits; the billing FAQ has the details. What to expect walks through the first visit, our telehealth page explains how appointments run in both states, and adults can read about individual care here.

When to reach out

You do not have to wait until February to find out whether this winter will be like the last one. If the pattern is familiar, the right time to call is now, while the days are still long enough to get ahead of it.

By Dr. Helene A. Miller, Family Psychiatry & Therapy