Bipolar Mood Swings: Can Changing Seasons Trigger Them? Expert Answers

Do you feel low when the monsoon season is at its peak? The gloomy and dull weather can affect your mood and energy levels as well. Not just monsoon, changes in mood swings can happen during any seasonal shifts. While these changes are normal, extreme shifts can impact those who have bipolar disorders. These severe mood swings during seasonal changes may even trigger a manic or depressive episode. Today, we will explain more about it in this article.

To understand this better, we interacted with our experts, Dr Sharadhi C, Consultant  Psychiatry, Aster CMI Hospital, Bangalore, and Dr Murali Krishna, Visiting Consultant  Psychiatry and Counselling Services, Aster RV Hospital, Bangalore.

Can Changing Seasons Trigger a Bipolar Mood Swing? 

Dr Sharadhi confirms that seasonal changes can indeed influence mood in some people with bipolar disorder. Explaining this, the expert says, “Changes in daylight, sleep patterns, daily routines and activity levels can affect the body’s biological clock and mood regulation.”

Adding to this, Dr Krishna says, “Yes, seasonal changes can influence mood in people living with bipolar disorder. Changes in daylight hours, temperature, sleep patterns, and daily routines can affect the body's internal biological clock, known as the circadian rhythm. These disruptions may contribute to mood episodes in susceptible individuals.”

Dr Krishna continues, “Research suggests that longer daylight hours during spring and early summer may trigger hypomanic or bipolar manic episodes in some individuals, while shorter days during autumn and winter may increase the likelihood of depressive symptoms."

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Tips to Deal With Seasonal Changes-induced Bipolar Mood Swings

Dr Sharadhi says that seasonal changes do not trigger mood swings in everyone with bipolar disorder. She adds, “Maintaining regular sleep, taking prescribed medication consistently, exercising and tracking mood changes can help. If symptoms such as severe depression, reduced sleep or unusually high energy appear, seek psychiatric guidance promptly.”

Dr Krishna shares tips that can help you cope with seasonal changes-induced bipolar mood swings:

• Maintaining a consistent daily routine is one of the most effective ways to reduce seasonal mood fluctuations.
• Going to bed and waking up at the same time every day helps stabilise the body's circadian rhythm.
• Regular physical activity, a balanced diet, stress management, and limiting alcohol or substance use can also support emotional stability.
• Individuals should pay close attention to early warning signs such as changes in sleep, energy levels, irritability, unusually elevated mood, or withdrawal from daily activities. Keeping a mood journal or using mood-tracking apps can help identify seasonal patterns and prompt early intervention.
• People diagnosed with bipolar disorder should continue taking prescribed medications and attend regular follow-up appointments, especially during seasons when they have previously experienced mood episodes.
• Family members can also play an important role by recognising behavioral changes early and encouraging timely medical support.
• With proper treatment, routine, and awareness, seasonal triggers can often be managed effectively, reducing the frequency and severity of bipolar mood swings.

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What Study Says About Seasonal Bipolar Mood Swings

A 2025 study, published in the European Psychiatry journal, confirms that changing seasons can indeed act as a powerful trigger for mood swings in people with bipolar disorder. 

The study discovered that people are more likely to experience high or manic episodes as the seasons transition into spring and summer. On the other hand, low or depressive episodes tend to happen more regularly during the shift into autumn and winter. 

The main reason for this seasonal effect is the change in natural daylight exposure all around the year. When daylight hours change, it disrupts the body's internal biological clock, which controls our natural sleep and wake patterns. This disruption affects the balance of important hormones such as melatonin and cortisol, making it much harder to keep moods stable. Shifting light levels also affect brain chemicals such as serotonin and dopamine. This directly changes a person's energy levels and emotional state. 

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Moreover, some individuals have specific genetic traits that make their internal clocks even more sensitive to these seasonal changes. But the study notes that you can manage it effectively and even prevent these seasonal bipolar relapses by maintaining strict sleep schedules and using specialised treatments such as light therapy.

ALSO READ - Bipolar Disorder Hidden Triggers: Can Caffeine and Sugar Spark a Manic Episode?

Conclusion

Shifting seasons and changing daylight hours can affect the body's internal clock and trigger bipolar mood swings. However, you can manage these episodes by maintaining strict daily routines, sticking to prescribed treatments, and monitoring early warning signs. By doing these, you can successfully navigate seasonal transitions and protect your mental well-being.