Summer Heat Fuels Unexpected Depression
Experts Reveal Understudied “Summer SAD” Mimics Winter Blues
As temperatures soar, feeling miserable indoors can seem contradictory, but for some, the summer slump is a very real health concern. Higher heat and humidity can worsen existing health issues and trigger depression in ways often overlooked.
A Different Kind of Seasonal Affective Disorder
While winter SAD is widely recognized, its summer counterpart remains significantly understudied. Psychology professor Kelly Rohan from the University of Vermont notes that research in this area is largely from decades ago and based on small sample sizes. This lack of awareness makes it difficult for individuals to connect their summer mood changes to the weather.
“There’s people with winter depression that are affected for years before they put it together. The same phenomenon applies to those who are out there suffering with summer depression, and haven’t yet put it together that this is a pattern.”
—Kelly Rohan, Psychology Professor, University of Vermont
The symptoms of summer SAD can differ from winter patterns. While winter SAD often involves lethargy and carbohydrate cravings, summer SAD can manifest as insomnia, a decreased appetite, and agitation. Unlike the sluggishness of winter, summer depression can bring overwhelming feelings of distress and an inability to function in the heat.
Nevada-based clinical psychologist Tanisha Ranger confirms that many clients report summer depression. She explains that oppressive heat naturally leads to withdrawal, reducing physical activity, sunlight exposure, and social interaction, all of which can exacerbate anxiety and depression symptoms.
“When the weather becomes oppressively hot, we naturally tend to withdraw indoors, and that means less movement, ironically less sunlight, and disrupted social interactions. All of that can exacerbate anxiety and depression symptoms if they were already present, and cause some if they weren’t.“
—Tanisha Ranger, Clinical Psychologist
Furthermore, extreme heat can impact serotonin production, contributing to irritability and poor sleep. This disruption is a significant predictor of depressive symptoms, creating a cyclical effect on mental well-being. According to the CDC, approximately 1 in 5 U.S. adults live with a mental illness (CDC, 2023).
Strategies to Combat the Summer Slump
Fortunately, relief from summer mood changes is possible with proactive strategies:
Prioritize Restful Sleep
Ensuring quality sleep is crucial, especially as heat sensitivity can increase during hormonal shifts. Using fans, cooling mattress pads, or lighter bedding can help. Dr. Marjorie Jenkins advises that “Poor sleep compounds heat sensitivity, especially during hormonal fluctuations.”
Cool Your Core Temperature
Clinicians may recommend cooling interventions to manage summer SAD symptoms. This can include spending time in air-conditioned spaces or taking timed cool baths or showers. Rohan suggests that “What seems to bring at least immediate relief is cooling the person down at the core.”
Stay Hydrated
Dehydration can mimic symptoms of anxiety and depression, such as dizziness and fatigue. Ranger emphasizes that adequate hydration is key for both physical and emotional regulation.
Incorporate Movement
Despite the urge to stay indoors, light physical activity can be beneficial. Engaging in a walk or run during cooler parts of the day, like early morning or late evening, can improve mood. Ranger recommends, “Even 10 minutes of intentional movement early in the day before the heat peaks can lift mood and help regulate circadian rhythms.”
Manage Social Comparisons
The idealized portrayal of summer in media can lead to feelings of inadequacy for those experiencing depression. Psychotherapist Shannon Garcia notes that not experiencing constant “summer fun” can create a sense of missing out, contributing to burnout and a slump.
Seek Professional Support
If you suspect you are experiencing summer SAD, consult a healthcare professional. Treatments like psychotherapy, cognitive behavioral therapy, and medication can effectively manage symptoms. Rohan highlights the importance of early intervention: “If it’s seasonal depression, it’s recurrent, meaning it comes back every year. So the earlier we can get in there and interrupt that cycle with an effective treatment, the better.”

