If your mood, energy, or daily functioning changes with the seasons, describe that pattern rather than assuming you need more discipline.
Your lived experience may include harder mornings, less interest in usual activities, more time asleep, or difficulty managing routines. Those changes can deserve assessment whether or not they turn out to be seasonal affective disorder.
What Is Seasonal Affective Disorder?
Seasonal affective disorder, or SAD, is depression with a recurring seasonal pattern. Winter-pattern SAD is more common, but depression can also follow a summer pattern. Persistent low mood, loss of interest, and changes in sleep, energy, or appetite deserve attention. NIMH: seasonal affective disorder
SAD is different from a difficult holiday season or disliking cold weather. You do not have to decide which explanation fits before seeking help.
What Does the ADHD Research Tell Us?
An often-repeated estimate that 27% of ADHD adults have SAD comes from a 2006 study of a clinical ADHD population. It is not a current population-wide rate and should not be used to predict an individual woman's experience. Amons and colleagues, 2006
The evidence supports paying attention to overlap. It does not establish that all ADHD women have a delayed body clock or that winter symptoms have one hormonal explanation. ADHD-specific seasonal research is more limited than the broader evidence for treating SAD.
Bring the Pattern to an Appointment
A few observations can help:
- When do changes usually begin and ease?
- Is low mood or loss of interest present most days?
- What happens to sleep timing and daytime alertness?
- Does the pattern repeat across years?
- What else changes at that time—work, social contact, pain, or responsibilities?
Include your usual ADHD difficulties and what feels different now. Sleep problems and depression can overlap without being interchangeable.
Treatment Options
Treatment may include light therapy, psychotherapy adapted for SAD, or antidepressant medication. The choice depends on the symptom pattern and clinical history.
For winter-pattern SAD, clinical light therapy uses a purpose-designed light box; ordinary room lighting is different. Ask about suitable intensity, timing, distance, and monitoring. Eye conditions, light-sensitive medicines, and bipolar history need consideration. CBT for SAD addresses seasonal depression; CBT for insomnia addresses persistent sleep difficulties and is not the same treatment. NIMH: treatment
Do not make seasonal medication changes without a prescribing plan.
Seasonal Accommodation Is Different From SAD Treatment
There is also a useful nonclinical question: Does your life need to look exactly the same in January as it does in June?
Katherine May’s essay How to light the dark months describes seasonal practices such as noticing dawn and dusk, getting outside during daylight, changing how a home is lit, and allowing behavior and routines to shift with winter. Those ideas can be useful as comfort, sensory support, environmental design, or self-accommodation. They should not be confused with treatments that have stronger evidence for seasonal affective disorder.
A 2024 systematic review looked for randomized trials of lifestyle approaches to SAD, including exercise, time outdoors, sleep, diet, and related strategies. It found only six studies; all were rated at high risk of bias and the certainty of evidence was very low. The authors concluded that there was not enough evidence to say these lifestyle changes treat SAD. Rothenberg et al., 2024
So it is reasonable to make winter more usable without promising that ordinary daylight, candles, décor, or a seasonal routine change will treat depression.
Possible seasonal accommodations include:
- arranging work or rest near the natural light available in your home
- getting outdoor daylight when it is accessible and feels useful
- shifting demanding tasks toward the part of the day when your energy is better
- making social plans shorter, earlier, or easier to recover from
- reducing unnecessary evening demands when fatigue increases
- making the sensory environment warmer, softer, or more inviting if that helps you function
- allowing some routines, expectations, or activity levels to change with the season
Ordinary indoor lighting and cozy lighting are not the same as clinical bright-light therapy. If you have a recurring seasonal depressive pattern, use comfort and accommodation alongside appropriate assessment and treatment rather than as a substitute for it.
Make the Daily Plan More Usable
When capacity drops, reduce the work around essential routines:
- Keep food and daily supplies easy to access.
- Arrange contact in a way you can manage.
- Plan a shorter version of an activity you value.
- Ask for help with responsibilities that have become difficult.
- Choose reminders that include the first action.
If bright light is uncomfortable, explain the sensory difficulty during treatment planning. Needing an adaptation does not mean you are unwilling to try treatment.
If you feel at risk of acting on suicidal thoughts, seek urgent local crisis or emergency support.