Seasonal Depression in Florida: Yes, It Happens

The short answer

Seasonal affective disorder does occur in Florida. Winter-pattern cases are less common than in northern states but real, driven by shorter days and less time outdoors. Summer-pattern cases, with insomnia, agitation and appetite loss during the hottest months, are relatively more common here. Both respond to treatment, including bright light therapy, antidepressants, cognitive behavioral therapy and planned changes to routine.

Every October, a certain kind of patient comes in a little embarrassed. They live in Jupiter or Melbourne or Fort Lauderdale, the weather is finally pleasant, and they feel their mood sinking the way it does every year around this time. They have read that seasonal affective disorder is a problem for people in Minnesota. They assume whatever they have must be something else, or something made up.

It is neither. Seasonal depression in Florida is real, it has two distinct forms, and it is one of the more treatable patterns we see.

What seasonal affective disorder is

The DSM-5-TR does not list seasonal affective disorder as a separate diagnosis. It describes major depressive disorder, or bipolar disorder, "with seasonal pattern," meaning depressive episodes that begin and end at characteristic times of year, for at least two consecutive years, with seasonal episodes substantially outnumbering non-seasonal ones over a lifetime. The National Institute of Mental Health estimates that millions of American adults have the condition, with the winter pattern far more common than the summer pattern nationally.

The winter pattern is linked to reduced daylight, which shifts circadian rhythm, alters melatonin timing and reduces serotonin activity in susceptible people. Its symptoms lean toward the atypical: oversleeping, carbohydrate craving, weight gain, heavy limbs and social withdrawal. The summer pattern is less well understood but appears tied to heat, humidity, longer and brighter days that disrupt sleep, and changes in routine. Its symptoms run the other direction: insomnia, poor appetite, weight loss, agitation and anxiety.

Why Florida is not immune to winter-pattern cases

Latitude matters, and the prevalence of winter-pattern seasonal depression does rise with distance from the equator. Classic surveys found rates of winter seasonal depression several times higher in New Hampshire than in Florida. But several times higher than a small number is still a meaningful number, and a few things about Florida make the winter drop more common than the latitude alone would predict.

Daylight still shrinks. Miami gets about 10.5 hours of daylight at the December solstice versus nearly 14 in June. That three-and-a-half-hour swing is smaller than Boston's but it is not nothing, and people who are sensitive to light cues respond to the change, not the absolute amount.

Floridians are indoors more than they think. Air-conditioned homes, cars and offices, tinted windows, and a culture of avoiding the midday sun mean that many residents get less bright light exposure than someone walking to the train in Chicago. The light that matters for mood is the light that reaches your eyes, and a sunny state does not help if you are under fluorescent tubes from eight to six.

Transplants carry their biology with them. A large share of Florida's population moved from the Northeast and Midwest. A person who had winter depression in New Jersey does not lose the susceptibility by crossing the state line, and the shorter, dimmer days from November to February can still trigger it.

The holiday season adds its own weight. Grief, family strain, financial pressure and disrupted routines cluster in the same months as the shortest days, and they compound each other.

Summer-pattern depression: Florida's version

If winter seasonal depression is less common here, summer seasonal depression is relatively more so. From June through September, South Florida and the Treasure Coast live under heat indexes above 100 degrees, humidity that makes outdoor exercise unpleasant or unsafe, afternoon storms that confine people indoors, and sunrise before six that fragments sleep. Add the low-grade dread of hurricane season and the exodus of seasonal residents, which empties social calendars, and the ingredients are in place.

Patients with summer-pattern depression describe trouble sleeping, restlessness, irritability, loss of appetite, anxiety and a feeling of being trapped inside. Because the symptoms are agitated rather than lethargic, they are often mistaken for an anxiety disorder or for stress, and the seasonal timing is missed. Asking "does this happen every summer?" is the question that reveals it.

Snowbirds and the reverse pattern

A distinct group deserves mention: seasonal residents who spend winters in Florida and summers up north. Some of them experience mood decline in the north in late fall, improve on arrival in Florida, then decline again in the Florida summer before they leave. Others find that the move itself, with its disruption of social ties, routines and medical care, is the trigger regardless of direction. Stedfast Psychiatry has offices in both Florida and South Carolina and offers telehealth in both states, which lets many seasonal patients keep a single clinician across the year rather than restarting care twice annually.

How we diagnose it

The evaluation is a standard psychiatric interview with specific attention to timing. We ask when episodes begin and end, whether they have recurred for at least two years, whether non-seasonal episodes have also occurred, and whether there is any history of elevated mood in the opposite season, because a spring or summer "high" after a winter low can indicate a bipolar pattern that changes treatment. We screen for thyroid disease, which can mimic the winter pattern, and for sleep apnea, which is common in Florida's older population and worsens in summer. The Seasonal Pattern Assessment Questionnaire is a useful structured tool and we use it when the picture is unclear.

Treatment

Bright light therapy

For the winter pattern, bright light therapy is first-line, with evidence from controlled trials comparable to antidepressants. The standard protocol is a 10,000 lux light box used for 20 to 30 minutes within an hour of waking, daily through the affected months. It works within one to two weeks, which is faster than medication. Patients with bipolar disorder need to use it cautiously under supervision because it can trigger hypomania. For Floridians, a morning walk outside before work can accomplish the same thing on most days, and it costs nothing.

Antidepressants

SSRIs are effective for seasonal depression, and bupropion extended-release is FDA-approved specifically for the prevention of seasonal affective disorder episodes when started before the expected onset. Some patients take medication only during the affected months; others with year-round vulnerability take it continuously. For the summer pattern, where insomnia and agitation dominate, the choice of medication leans toward agents that do not worsen sleep.

Cognitive behavioral therapy

CBT adapted for seasonal depression, developed and tested at the University of Vermont, matched light therapy in a head-to-head trial and produced better outcomes the following winter, apparently because patients learned skills that carried over. It focuses on scheduling pleasant activities during the affected season and challenging the thoughts that drive withdrawal.

Practical adjustments

For summer-pattern patients, blackout curtains and a consistent wake time counter the early sunrise, air-conditioned exercise replaces outdoor exercise, and deliberate social scheduling fills the gap left by departed seasonal friends. For winter-pattern patients, morning outdoor light, keeping the exercise routine through the holidays and planning for the known difficult weeks all help. None of this replaces treatment for a moderate or severe episode, but for mild cases it can be enough.

When it is more than seasonal

Some patients who come in for a seasonal dip turn out to have persistent depression that worsens seasonally, or a bipolar spectrum disorder. For depression that has not responded to two or more medications, Deep TMS at our Palm Beach Gardens office and Spravato at Boynton Beach, Palm Beach Gardens and Royal Palm Beach are available regardless of season.

The point

Living in Florida does not exempt you from seasonal depression. If your mood drops on a calendar, in winter or in the heat of summer, that pattern is a diagnosis waiting to be made and a treatment waiting to be started. Stedfast Psychiatry sees patients at 13 offices in Florida and South Carolina and by telehealth; the self-pay new-patient visit is $185, and most insurance and Medicare are accepted. The best time to come in is before the season you dread, not in the middle of it.

Frequently asked questions

Can you get seasonal affective disorder in Florida?

Yes. Winter-pattern seasonal depression occurs in Florida at lower rates than in northern states but is far from rare, especially among transplants and people who spend most daylight hours indoors. Summer-pattern seasonal depression, driven by heat, humidity and disrupted sleep, is relatively more common in Florida than in most of the country.

What are the symptoms of summer seasonal depression?

Insomnia, loss of appetite, weight loss, restlessness, irritability, anxiety and a feeling of being trapped indoors, recurring during the hottest months. Because the symptoms are agitated rather than lethargic, it is often mistaken for anxiety or stress. The clue is that it returns every summer.

Does light therapy work if I already live somewhere sunny?

Yes, for the winter pattern. What matters is bright light reaching your eyes in the morning, not the climate outside. Many Floridians get little direct morning light because of indoor routines. A 10,000 lux light box for 20 to 30 minutes after waking, or a morning walk outside, works within one to two weeks for most patients.

Should I start medication before the season begins?

Often, yes. Bupropion extended-release is FDA-approved for preventing seasonal affective disorder episodes when started before the expected onset, and starting light therapy or other antidepressants a few weeks ahead of the usual decline is a common strategy. A psychiatric evaluation during your good season is the best time to plan.