How seasonal changes can affect your mental health

As the seasons change, your mood, energy levels and daily rhythms can shift too. You may feel more energized and social when the days are long and sunny. As days get shorter, you may notice that you want slower routines, quieter evenings or more time at home. 

These seasonal changes don’t necessarily mean something is wrong. They can be part of how your mind and body respond to changes in light, weather and routine. But for some people, seasonal shifts can make it harder to sleep, stay motivated, manage stress or feel like themselves. Here’s what to watch for, why it happens, and how to support your mental health year-round.

Key takeaways

• Seasonal changes can affect mood, energy and daily rhythms through shifts in daylight, weather and routine—this is a normal response. Your brain and body use seasonal cues to regulate your body.

• Winter’s shorter days can be linked to lower energy, more time indoors and, for some people, seasonal affective disorder (SAD), a type of depression that follows a seasonal pattern

• Every season can affect mood differently. While winter is often associated with lower energy, spring and summer can bring stress due to longer days, busier schedules, disrupted sleep or social expectations.

• Pay attention to changes in sleep, appetite, mood or energy level, as well as trouble concentrating, social withdrawal or loss of interest in usual activities

• Simple habits—morning light exposure, a consistent sleep schedule, staying active and keeping up social connection—can help support mood as seasons shift

• Talk with a healthcare provider if symptoms last more than a few weeks or disrupt daily life, or if you notice a regular change in your mood at the same time each year

Why can seasonal changes affect mental health?

Seasonal changes can affect mental health in several ways. One of the biggest factors is daylight. Changes in the amount of natural light can influence your circadian rhythm, your body’s internal clock that helps regulate sleep, energy levels, hormone production and mood. When daylight hours increase or decrease, your circadian rhythm may shift, affecting how alert, rested or emotionally balanced you feel. Weather and seasonal changes can also affect daily habits including how much time you spend outdoors, how active you are, and how often you connect with other people.

These changes can build on each other. For example, shorter days may mean less time outside and less exposure to natural light. Colder weather may make it harder to spend time outside and stay active. Both can impact your schedule, including social activities, exercise habits and sleep. Over time, these shifts can affect your energy, stress levels, mood and sense of connection. 

Everyone responds to seasonal changes differently. 

How each season can affect mood

*SAD is a type of depression that follows a seasonal pattern, often starting in fall or winter and improving in spring or summer.

Signs seasonal changes may be affecting your mental health

It’s normal to notice some changes in your mood, energy or habits as seasons shift. But seasonal changes may be affecting your mental health if you notice:

• Sleeping more or less than usual 

• Interrupted sleep

• Changes in appetite

• Irritability

• Trouble concentrating

• Pulling away from friends and family

• Loss of interest in activities you usually enjoy

If these changes interfere with your daily routine or don’t improve as you adjust to the new season, it may be time to get more support.

Simple ways to support your mood year-round

Small habits can help you feel more steady as seasons change. If shorter days affect your winter mood, try getting outdoor light soon after waking or using a light therapy lamp if recommended by your provider. Keep a consistent sleep schedule as much as possible, even when daylight hours change.

Look for ways to stay active in every season. That might mean indoor options, like group classes or online workouts, or seasonal activities, like walking, swimming or ice skating. It can also help to plan regular time with friends, family or community groups, especially during seasons when you’re more likely to stay home.

If these steps don’t help, or if your symptoms feel hard to manage, reach out for support.

When to talk with a healthcare provider

Consider talking with a healthcare provider if you have:

• Symptoms that last more than a few weeks

• Changes that affect your work, relationships or daily routine

• Symptoms of depression or anxiety

• Mood changes that return around the same time each year

Feelings of sadness, hopelessness, low energy or loss of interest in daily activities can be signs of depression, including seasonal affective disorder. Support is available, and you don’t have to wait until symptoms feel severe to ask for help. If you’re experiencing thoughts of self-harm or suicide, or a mental health crisis, contact the 988 Suicide & Crisis Lifeline by calling or texting 988.