Often, when Dr. Rosenthal talked about his research, someone would approach him to say that the same thing happened to them — but in the summer. In 1987, he and his colleagues published a report of 12 people who experienced a pattern of seasonal depression between March and October. This and subsequent work suggested that summer SAD presented differently than its winter counterpart, and might have different causes.
“Summer SAD is more of an agitated depression,” said Dr. Rosenthal, a clinical professor of psychiatry at the Georgetown University School of Medicine. While those with winter SAD tend to oversleep and overeat, summer SAD often shows up with insomnia and lowered appetite.
Seasonal Affective Disorder Isn’t Just for Winter
Feeling blue even though everyone seems to be basking in perfect summer weather? There might be a good reason for that.