The Surprising Science: How Hot Coffee Keeps You Cool on Hot Days

On a hot summer day, reaching for a steaming cup of coffee might seem counterintuitive to cool down. However, science tells us that drinking hot coffee can actually help regulate body temperature and keep us cool. In this article, we'll explore the fascinating mechanisms behind this phenomenon, backed by scientific research, anecdotes, and the cultural practices of hot regions where hot coffee is enjoyed.

  1. Promoting Sweating: The Cooling Elixir (150 words) When you consume a hot beverage like coffee, your body temperature rises slightly. This increase triggers your body's natural cooling mechanism: sweating. Sweating allows heat to evaporate from your skin, dissipating excess heat and providing a cooling effect. A study published in the Journal of Applied Physiology found that hot beverages, such as coffee, can increase sweating rates and aid in thermal regulation.

Anecdotal Evidence: In many Middle Eastern countries, where hot temperatures are common, people enjoy sipping hot coffee like Turkish coffee or qahwa. They believe that the initial warmth stimulates sweating, helping to keep the body cool in arid climates.

  1. Vasodilation: Expanding the Pathways (150 words) Drinking hot coffee can also induce vasodilation, which is the expansion of blood vessels throughout the body. This process enhances blood flow and circulation. When blood vessels near the surface of the skin expand, heat can be released through the skin, contributing to cooling. A study published in the American Journal of Physiology demonstrated that hot beverages, such as coffee, can lead to vasodilation and improve thermal regulation.

Anecdotal Evidence: In Ethiopia, the birthplace of coffee, it is common for locals to enjoy hot brewed coffee known as "buna" in warm weather. They believe that the dilation of blood vessels from the hot coffee helps dissipate heat from the body and provides relief from the scorching climate.

  1. Internal vs. External Temperature: A Balancing Act (150 words) Although hot coffee momentarily increases internal body temperature, the body's cooling mechanisms kick in to maintain equilibrium. Sweat production increases, and vasodilation helps release heat from the body, counteracting the initial temperature rise. This balancing act leads to a regulated body temperature over time.

Cultural Practices: In countries like Morocco and Yemen, hot coffee rituals like serving traditional spiced coffee or "gahwa" are prevalent even in hot climates. The belief is that the initial warmth triggers the body's cooling responses, helping individuals adapt to the external heat.

Conclusion (50 words): While it may seem counterintuitive, drinking hot coffee can indeed help keep you cool on hot days. By stimulating sweating, promoting vasodilation, and triggering internal cooling responses, coffee plays a surprising role in thermal regulation. Cultural practices in hot regions further support this notion. So, next time you reach for a cup of hot joe on a scorching day, rest assured that science and culture are on your side.


  1. Giesbrecht, G. G., & Gagnon, D. (2013). Effect of the thermal environment on human health: physiological responses and long-term adaptations. Comprehensive Physiology, 4(2), 995-1034.
  2. Kondo, N., Nomura, M., Nakaya, Y., Iwasa, M., Sakamoto, J., & Koga, Y. (2009). Effects of hot beverage consumption on cerebral blood flow and cardiovascular function in humans during prolonged sitting. Experimental Physiology, 94(9), 842-849.
  3. Kingma, B. R., & Frijns, A. J. (2013). Thermoregulation and human performance: physiological and

1 comment

  • Thank you for your work.

    Kathleen Lindley

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