Summer depression: understanding the seasonal mood disorder and its rising recognition

While many relish the warmth and extended daylight of summer, an increasing number experience summer depression, a seasonal mood disorder affecting energy, sleep, and mood, requiring careful attention and tailored treatment.

What many people treat as the happiest season of the year can, for some, bring a recognisable form of depression. In warmer months, some individuals experience summer depression, a seasonal mood disorder that can affect energy, sleep, appetite, work and relationships. Dr Ibrahim Magdi, a psychiatrist, said the condition is not simply a passing low mood but a seasonal mental health problem linked to changes in climate and daylight, much like winter depression affects others in colder months.

The most common signs often begin as temperatures rise and daylight lengthens. People may feel persistent sadness, anxiety or inner tension without an obvious cause, along with a loss of interest in daily life. Other symptoms can include insomnia or irregular sleep, fatigue despite adequate rest, reduced appetite, low energy and a drop in productivity and social engagement. Mayo Clinic says seasonal affective disorder is a type of depression that appears at certain times of year and can involve low energy, sleep changes, appetite changes and difficulty concentrating, while other medical sources describe the summer form as a reverse pattern of seasonal depression.

Certain groups appear more vulnerable. Dr Magdi said women are among those at higher risk, partly because of hormonal changes, and that people with thyroid disorders, especially hyperthyroidism, may be more prone to mood symptoms. He also highlighted pregnancy, the post-partum period, adolescence and early adulthood as times when hormonal and psychological shifts can make seasonal changes harder to tolerate. Independent medical summaries on summer depression likewise point to sunlight, heat and hormone-related changes as possible contributing factors.

The key warning sign is persistence. Dr Magdi said symptoms should not be dismissed as normal seasonal irritability, especially if they last for weeks or begin to disrupt study, work or relationships. Mayo Clinic advises that seasonal mood changes should be taken seriously because timely treatment can help people keep functioning well through the year. Treatment may include psychotherapy, medication and, in some cases, light therapy, though the latter is more commonly used for winter-pattern seasonal affective disorder. It is also important to distinguish summer depression from heat-related illness: Mayo Clinic warns that heat stroke is a medical emergency with symptoms such as confusion, high body temperature and nausea, and it requires urgent treatment.