The Sea and Longevity: A New Perspective on Coastal Living
We have known for a long time that getting closer to nature has benefits for our health. Beyond avoiding pollution in our cities, getting closer to the natural environments around us can improve our psychological well-being, perhaps even encouraging us to lead a more active life. Little by little, we are also observing that something similar happens if we change the mountain for the sea.
More Sea, More Life
A recent study has observed a correlation between residing in coastal areas and greater longevity. The analysis provides evidence of the link between bodies of water and the health and well-being of people. Interestingly, the relationship between “blue spaces”—such as oceans and seas—and health is a bit more complex than it might seem initially.
The 50-Kilometer Factor
The study indicated that the benefits of living near the ocean significantly improved the quality of life for individuals residing within about 50 kilometers of the coast. On the other hand, an intriguing trend emerged inland: those who lived near smaller bodies of water (around 10 km² in surface area) tended to experience shorter life expectancies.
Global Perspectives on Coastal Living
Globally, coastal residents are expected to live a year or more longer than the median age of 79. In contrast, individuals living in urban areas near inland rivers and lakes are more likely to die around age 78. Jianyong “Jamie” Wu, a member of the research team, highlighted that this increased longevity among coastal residents is likely due to a variety of interconnected factors.
Exploring the Data: 66,000 Census Areas
The study, conducted in the United States, analyzed 66,263 census areas to examine life expectancy and its relationship with the proximity to water bodies, while also controlling for socioeconomic and demographic factors. You can find more detailed findings in an article published in the journal Environmental Research, accessible here.
Investigating the Causes
The researchers identified various factors that could mediate the relationship between coastal living and longevity. These include milder temperatures, better air quality, more opportunities for recreational activities, improved transport, less vulnerability to droughts, and higher income levels. Understanding these factors is crucial, as they could explain why living near the coast correlates with a longer life expectancy, unlike those near inland waters.
“Pollution, poverty, lack of opportunities for physical activity, and a higher risk of flooding are the primary triggers for the differences in longevity,” stated Yanni Cao, co-author of the study.
Correlation versus Causation
The existence of a correlation does not always imply a direct causal relationship. For instance, if income is the determining factor in longevity, this causation could manifest in various ways. Coastal areas might be more expensive, attracting wealthier residents. Alternatively, they may provide more job opportunities, leading to higher incomes and, consequently, longer lifespans.
In both scenarios, the mediating factor remains consistent, yet the causal relationships differ.
Conclusion: Embracing Coastal Living for a Healthier Future
While living near the coast may offer numerous health benefits, it’s essential to recognize the multifaceted relationships influencing longevity. Investing in coastal living could mean not just a home by the sea, but also a life enriched with well-being and longevity.
This article was originally published in August 2025.