From The Guardian:
Proximity to water – especially the sea – is associated with many positive measures of physical and mental wellbeing, from higher levels of vitamin D to better social relations. “Many of the processes are exactly the same as with green space – with some added benefits,” says Dr Mathew White, a senior lecturer at the University of Exeter and an environmental psychologist with BlueHealth, a programme researching the health and wellbeing benefits of blue space across 18 (mostly European) countries.
An extensive 2013 study on happiness in natural environments – to White’s mind, “one of the best ever” – prompted 20,000 smartphone users to record their sense of wellbeing and their immediate environment at random intervals. Marine and coastal margins were found by some distance to be the happiest locations, with responses approximately six points higher than in a continuous urban environment. The researchers equated it to “the difference between attending an exhibition and doing housework”.