By late August, a few patients each year ask a version of the same question: is there anything I can do now so that this winter doesn’t go the way last winter did? They remember the months of oversleeping, the afternoon crash, the carbohydrate cravings, and the flat mood that lifted, reliably, every spring. That pattern has a name — seasonal affective disorder — and unlike most mood conditions, it can be prepared for in advance.
Most people wait until the low mood has already set in, usually in November or December, before seeking help. Clinically, that is the least effective time to start. The most effective window is now, before the clocks change and daylight begins its steep decline.
What Seasonal Affective Disorder Actually Looks Like
Seasonal affective disorder is a recurring form of depression tied to a specific pattern: symptoms appear in fall or winter and resolve in spring, for at least two consecutive years.
- Low energy and a strong pull toward oversleeping
- Increased appetite, particularly for carbohydrates, and weight gain
- Difficulty concentrating and a general sense of heaviness
- Social withdrawal, even from relationships that felt easy in summer
- A mood that reliably lifts again once daylight increases in spring
Why Starting Now Matters
Light therapy and circadian rhythm adjustments work best as prevention, not rescue. Starting a light box routine and a consistent sleep schedule in late August or September, well before the time change in November, gives the body’s internal clock time to adapt gradually rather than react to a sudden drop in morning light.
New York’s latitude makes this especially relevant. The difference between June and December daylight here is dramatic, and that drop is precisely the mechanism believed to drive seasonal affective disorder in vulnerable individuals.
Distinguishing Seasonal Depression From Depression in General
The defining feature is the pattern, not the severity. Depression that appears regardless of season, or that does not lift in spring, is not seasonal affective disorder and needs a different treatment approach. A careful history across multiple years is usually enough to tell the two apart, and many people benefit from a brief evaluation before assuming either label.
What Actually Helps
- Start morning light exposure now. Ten thousand lux light box use for twenty to thirty minutes each morning is most effective when begun before symptoms appear, not after.
- Anchor sleep and wake times. A consistent schedule, even on weekends, keeps the circadian rhythm stable as daylight hours shrink.
- Get outside in the morning while daylight still allows it. Natural light in September and October is stronger than most indoor lighting and reinforces the same circadian cues as a light box.
- Schedule an evaluation if you have a history of seasonal depression. Some patients benefit from starting therapy or medication proactively rather than waiting for symptoms to return.
- Build in movement and social contact before isolation sets in. Both are easier to maintain than to restart once mood and motivation have already dropped.
Clinical Interpretation
Seasonal affective disorder responds well to treatment, and the single biggest factor in how manageable a given winter turns out to be is timing. Waiting for the low mood to arrive before acting means fighting an already-established pattern; starting now means working with the body’s rhythm before it shifts.
For anyone who recognizes this pattern from previous years, late summer is not too early to plan. It is, clinically, the right time.
Dr. Dilarom Demiralay / New York, August 2026