What are common symptoms of Seasonal Affective Disorder (SAD)?

SAD includes symptoms of major depression such as persistent low mood, loss of interest, low energy, sleep and appetite changes, difficulty concentrating, feelings of hopelessness or worthlessness, and sometimes thoughts of death or suicide. Winter-pattern SAD often includes oversleeping, carbohydrate cravings, weight gain, social withdrawal, extreme fatigue, and increased anxiety or sadness.

How common is Seasonal Affective Disorder (SAD)?

Seasonal mood changes are common. An estimated 10–20% of Americans experience mild seasonal mood shifts, and about 5% meet criteria for SAD. It is more common in women, often begins in early adulthood, and is more prevalent farther from the equator.

When are SAD symptoms usually the worst?

Many people experience the most intense SAD symptoms in mid-winter, often around January and February, when daylight is shortest and routines can feel most disrupted.

Is Seasonal Affective Disorder (SAD) a spiritual failure?

No. SAD is not a spiritual failure, weakness, or lack of gratitude. It is a real mental health condition influenced by biological factors like light exposure, sleep rhythms, and brain chemistry. Addressing SAD with practical care and support is wise and appropriate.

What causes Seasonal Affective Disorder (SAD)?

SAD is linked to reduced sunlight, which can disrupt circadian rhythms, lower serotonin, increase melatonin, and contribute to low vitamin D levels. These changes can affect energy, sleep, and mood. Stress, isolation, and negative thought patterns can also intensify symptoms.

What is light therapy and does it help with SAD?

Light therapy is a common, effective treatment for winter-pattern SAD. It typically involves using a 10,000-lux light box that filters UV light for about 20–30 minutes in the morning. Many people notice improvement within 1–2 weeks with consistent use.

What type of light box should I use for SAD?

A commonly recommended option is a 10,000-lux light box that filters out UV light. It should be positioned about 16–24 inches away at a slight downward angle, typically used in the morning while reading or working.

Can exercise help with Seasonal Affective Disorder (SAD)?

Yes. Consistent movement supports mood by improving brain chemistry related to motivation, calm, and wellbeing. Exercise does not need to be intense—walking, stretching, light strength training, or classes can help when done regularly.

What are practical morning habits that can help with winter depression?

Helpful morning structure may include light therapy, getting outside briefly when possible, prayer or Scripture reading, gratitude journaling, breathwork or mindfulness, and gentle movement. A steady morning rhythm can anchor thought patterns and improve emotional regulation.

Does nutrition affect seasonal depression?

Nutrition can influence mood through inflammation and blood sugar stability. Reducing alcohol, added sugar, and highly processed carbs while increasing protein, healthy fats, vegetables, and hydration may support more stable energy and mood.

Why is isolation risky during the winter months?

Winter can invite withdrawal, and depression can intensify it. Isolation often worsens sadness and anxiety, while supportive connection can interrupt the spiral and help regulate the nervous system. Even brief, consistent community contact can be protective.

When should I talk to a doctor or therapist about SAD?

If symptoms significantly impact daily functioning—sleep, appetite, energy, concentration, motivation, relationships, or work—it is important to consult a physician or mental health professional. A physician may also rule out thyroid issues or vitamin deficiencies. If you have thoughts of self-harm or suicide, seek immediate help.

What therapy is effective for Seasonal Affective Disorder (SAD)?

Cognitive Behavioral Therapy (CBT) is often effective for seasonal depression because it helps identify and change thought patterns that worsen mood and supports healthier routines and coping strategies.

How do I know if I have SAD or just the winter blues?

Winter blues usually involve mild symptoms with continued ability to function, while SAD tends to significantly impair daily life and meets criteria for major depression. If your symptoms feel intense, persistent, or disruptive, it is wise to seek a professional evaluation rather than self-diagnosing.

Winter Blues or Seasonal Affective Disorder?

Q: What is the difference between the winter blues and Seasonal Affective Disorder (SAD)?

The winter blues typically involve mild, temporary dips in mood, energy, and motivation during darker months, while Seasonal Affective Disorder (SAD) is a clinical diagnosis (Major Depressive Disorder with Seasonal Pattern) that significantly disrupts daily functioning and includes symptoms consistent with major depression.

Rebecca Maxwell
Feb 25
5 min read

Every year when the time changes and the days grow shorter, I begin to hear a similar refrain:

“I don’t feel like myself.”

“I’m more tired than usual.”

“I just want to hibernate.”

If that sounds familiar, you’re not alone.

There is a difference between the winter blues and Seasonal Affective Disorder (SAD)—and

it’s important not to minimize either.

The winter blues are common. Mood dips. Energy lowers. Motivation decreases. But Seasonal

Affective Disorder is something more significant. It is a clinical diagnosis—Major Depressive

Disorder with Seasonal Pattern—and it deserves serious attention.

Approximately 10–20% of Americans experience mild seasonal mood changes. Around 5% meet

criteria for SAD. It is more common in women, typically begins in early adulthood, and becomes

more prevalent the farther one lives from the equator. Most people feel symptoms most intensely

in January and February.

And here is what I want you to hear clearly: this is not a spiritual failure. It is not a lack of

gratitude. It is not weakness.

We are embodied souls. And seasons affect the body.

What SAD Actually Looks Like

To be diagnosed with Seasonal Affective Disorder, someone must meet criteria for major

depression, including:

 Depressed mood most of the day, nearly every day
 Loss of interest in previously enjoyable activities
 Changes in appetite or weight
 Sleep disturbances
 Low energy
 Feelings of hopelessness or worthlessness
 Difficulty concentrating
 Thoughts of death or suicide

Winter-pattern SAD often includes:

 Oversleeping
 Craving carbohydrates
 Weight gain
 Social withdrawal (“hibernating”)
 Extreme fatigue
 Heightened anxiety and sadness

SAD is often diagnosed after at least two consecutive years of seasonal symptoms. A physician

may order lab work to rule out thyroid dysfunction or vitamin deficiencies (which is especially

important for many women).

Depression with a seasonal pattern can sometimes feel more abrupt and disruptive than non-

seasonal depression because it descends quickly and interferes with daily functioning.

If symptoms are significantly impacting your life, consult your physician. Treatment may include

medication, supplements, or other interventions. Do not self-diagnose.

Why Does This Happen?

We do not know all the causes, but research suggests:

 Reduced sunlight disrupts circadian rhythms (your internal clock).

 Serotonin levels may decrease.

 Melatonin may increase, leading to sluggishness.

 Vitamin D levels may drop.

In other words, less light changes brain chemistry.

Genesis tells us that God designed the “greater light to govern the day” (Genesis 1:16). Light is

not incidental to human life—it is foundational. Our bodies are designed to respond to it.

When light decreases, mood can decrease.

This is not imaginary. It is biological.

And yet biology is never the whole story. Thought patterns, stress, isolation, and anticipation of

winter can compound the symptoms. The mind and body speak to each other constantly.

Light Is Medicine

Light therapy is one of the most effective treatments for winter-pattern depression.

Use a 10,000-lux light box that filters out UV light. Place it 16–24 inches from your face at a

slight downward angle. Use it first thing in the morning for about 20–30 minutes while reading

or working. Most people notice improvement within one to two weeks when used consistently.

Also: go outside whenever possible.

Even on cold days. Even for ten minutes.

Psalm 84:11 says, “The Lord God is a sun and shield.” Light is both physical and symbolic in scripture. It reveals, regulates, and restores. We were not designed to live in darkness—physically or spiritually.

Movement Is Not Optional

Movement is medicine for mood.

Exercise increases serotonin (calm and well-being) and dopamine (motivation and pleasure). It

does not have to be extreme. It needs to be consistent. Start small. Walk. Stretch. Lift light weights. Join a class. Ask a friend to hold you accountable.

You will not feel like doing it. Do it anyway.

Feelings often follow obedience to wise action.

Ecclesiastes reminds us that there is “a time for every season” (Ecclesiastes 3:1). Winter may

slow us down, but it does not excuse complete stagnation. The body must move to stay

regulated.

Guard Your Morning

Winter makes mornings harder. So build structure around them.

A grounded morning rhythm may include:

 Light therapy
 Prayer or Scripture reading
 Gratitude journaling
 Breathwork or mindfulness
 Gentle movement

Philippians 4:8 instructs us to intentionally direct our thoughts toward what is true and life-

giving. Cognitive patterns shape emotional outcomes. A morning practice helps anchor the mind

before the day begins.

You are not trying to manufacture positivity. You are training attention.

Eat With Intention

Nutrition influences inflammation, and inflammation influences mood.

Limit alcohol (a depressant). Reduce sugar and highly processed carbohydrates. Increase lean

proteins, healthy fats, vegetables, and water. If cravings are strong, nourish your body first before

indulging.

Small nutritional shifts can create measurable mood improvements.

Do Not Isolate

Winter invites withdrawal. Depression amplifies it.

But isolation fuels sadness.

Hebrews 10:25 urges us not to neglect meeting together. Community stabilizes us. Even brief

connection interrupts the spiral of withdrawal.

If symptoms persist or intensify, consider speaking with a therapist. Cognitive Behavioral

Therapy is particularly effective for seasonal depression because it addresses distorted thought

patterns that worsen mood.

Seeking help is wisdom, not weakness.

A Final Word

Sometimes winter is simply winter.

And sometimes winter exposes deeper depression.

If your energy is low but functioning remains intact, you may be navigating seasonal blues. If

your joy, motivation, sleep, appetite, and concentration are significantly impaired, do not ignore

it.God created you as a whole person—body, mind, and spirit. When one part is strained, the others

feel it.There is no shame in addressing biological realities with practical tools. Light. Movement.

Nutrition. Structure. Support.

And above all, remember: seasons change.

“The light shines in the darkness, and the darkness has not overcome it.” (John 1:5) Winter does not get the final word.

About the Author

I am a Licensed Marriage and Family Therapist in private practice and lead a team of counselors at Jacksonville Counseling Services in Jacksonville, Florida. I am the author of Jesus and Your Mental Health. Before launching my practice in 2015, I spent 15 years serving in church ministry with children, adolescents, and families, including helping build and launch the children’s ministry at The Church of Eleven22 under Pastor Joby Martin, where I was also ordained. I remain actively connected to Eleven22 as a speaker, teacher, podcast guest, and mental health resource for pastors and ministry leaders. I am deeply passionate about the intersection of Scripture and psychology, equipping Christians to pursue relational health, strong families, and secure, connected relationships rooted in faith. Above all, I seek to live from my truest identity as Christ’s beloved, helping others embrace that same foundation of peace, healing, and purpose.