Stand at the water’s edge for a few minutes and something in your body changes gear. Breathing slows. The mental noise drops a notch. For a long time that was just something people knew; over the past fifteen years, it’s become something researchers can measure. The field is called blue health, the environments are called blue spaces, and the growing evidence behind them is the scientific backbone of everything we do in the water at Naru. Here’s what the research actually shows, what it doesn’t, and why the ocean holds a layer of meaning for Aboriginal communities that the studies are only beginning to describe.
What is blue space therapy?
Blue space therapy means using time in or near water, oceans, rivers, lakes, even urban waterfronts, as a deliberate part of supporting mental health. The BlueHealth research initiative defines blue spaces as outdoor environments that prominently feature water and are accessible to people, whether you’re in it, on it, beside it, or just able to see and hear it.
The “therapy” part covers a spectrum. At one end sits the informal version: regular walks by the water, ocean swims, time on the sand. At the other end sit structured programs, sometimes called blue care or the blue gym, where water activities are paired with guided support. Our own surf therapy for mental health programs sit at that structured end.
What the research actually shows
The headline finding is consistent across the strongest evidence. A widely cited systematic review by Gascon and colleagues in 2017 examined 35 studies from around the world, rated 22 of them good quality, and concluded the balance of evidence supports a positive association between time in outdoor blue spaces and both mental wellbeing and physical activity levels. Later research kept adding detail: a 2020 review found that being near, in, on or under water lowers stress and anxiety, improves mood and wellbeing, and reduces heart and breathing rates. Studies of people with sea views in Ireland found lower risk of depression among those with the most water in sight.
The effects don’t need hours. Studies of short exposures suggest 20 to 30 minutes near water is enough to produce measurable shifts in stress markers and mood, which is part of why blue space time is so practical as an everyday tool rather than an occasional event.
Two honest caveats belong here, because good science reporting includes them. Not every study finds an effect; some large analyses have shown weaker or no associations for certain outcomes and conditions, and the evidence for mental health is stronger than the evidence for physical health outcomes like heart disease. And most of this research shows association rather than airtight cause and effect. The overall direction of the evidence is positive and getting stronger, but the ocean is a support for mental health, not a cure, and time in blue space complements professional care rather than replacing it.
Why water works: the three mechanisms
Researchers keep converging on the same three pathways to explain the blue space effect, and they map almost perfectly onto what happens in a surf program.
- Physical activity. People simply move more near water. An Australian study of 350 adults found blue space proximity linked with higher activity levels, and physical activity is one of the best-established protective factors against depression and anxiety. Paddling out is exercise that doesn’t feel like exercise.
- Mental restoration. Water environments produce what psychologists call soft fascination: the moving, glinting, rhythmic qualities of water hold attention gently without demanding effort, giving the overworked directed-attention system a rest. It’s the opposite of a screen. Waves also interrupt rumination, because you can’t spiral and read a set at the same time.
- Social connection. Blue spaces are where people gather, and research finds they’re used for social and wellness purposes even more than green spaces. Shared water time builds the kind of low-pressure connection that’s hard to manufacture in a room.
No single mechanism carries the effect alone. The strongest programs stack all three on purpose, which is exactly the logic behind the structure described in how a surf therapy session works: movement in the water, restoration from the environment, and connection built on the sand.
The ocean versus other blue spaces
Rivers, lakes and even city fountains show benefits in the research; the essential ingredients, visual openness, natural movement, calming sound, show up wherever water does. Coastal environments carry a few extras, though. The scale of the horizon produces a distinct sense of perspective that participants describe again and again. Immersion adds cold-water and sensory effects you can’t get from a bench beside a pond. And the ocean is the only blue space that pushes back, which is where the confidence-building lives: managing yourself in moving water is a genuine achievement your nervous system registers as such.
One more research finding worth knowing: several studies suggest the mental health benefits of living near blue space are strongest for people on lower incomes. Free, open, powerful and equally available to everyone on the beach, the ocean is one of the most equitable mental health resources a coastal country has. Australia, where most of the population lives within reach of the coast, is sitting on it.
Sea Country: the layer the studies are catching up to
For Aboriginal people, the ocean was never just scenery or a gym. Saltwater Country is family, story, law and identity, and time in the water is time in relationship with it. When an Aboriginal young person paddles out on the mid-north coast of NSW, the wellbeing effect the researchers measure is real, and it’s carried inside something older: connection to Country as a foundation of social and emotional wellbeing, a framework Aboriginal health thinking has held for a very long time.
This is why blue space science and cultural practice aren’t competing explanations at Naru; they’re the same water. The research gives services and funders a language for what communities already knew, and the cultural connection gives the science a depth it doesn’t have on its own. You can see how that combination plays out for young people specifically in the benefits of surfing for youth mental health.
Bringing blue space into your own week
You don’t need a program to start. The research points to a few simple patterns that do the heavy lifting: regularity beats duration, so twenty minutes by the water several times a week outperforms a rare long day; getting in beats looking at, when conditions and confidence allow, because immersion and activity engage more of the mechanisms; and leaving the phone in your bag matters, since the restoration pathway depends on the water having your attention. If the sea is out of reach, a river, a lake or a harbour walk carries much of the effect.
And if you’re supporting a young person who’s struggling, structured programs exist precisely because the ocean works best with guidance around it. Naru Indigenous Corporation runs surf programs for Aboriginal youth on the NSW mid-north coast that put everything on this page into practice, in the water, on Country. If things feel heavy right now, please also reach out to a doctor or a service you trust; the ocean is a powerful support, and it works best alongside people in your corner.
Frequently Asked Questions
What counts as a blue space?
Any accessible outdoor environment that prominently features water: oceans, beaches, rivers, lakes, wetlands, harbours and even urban water features. Research finds benefits across the range, with coastal settings adding immersion and scale.
How much time near water do you need?
Studies suggest measurable stress and mood benefits from around 20 to 30 minutes, and regular short visits appear more valuable than occasional long ones.
Is blue space better than green space for mental health?
Both help, and the evidence for each is strong. Some research suggests water settings are used more for wellbeing purposes and evoke distinctive emotional responses, while immersion and water-based activity add pathways green space can’t offer.
Can time in the ocean replace professional mental health support?
No. The evidence supports blue space as a genuine complement to professional care, not a substitute. If you or someone you know is struggling, talk to a doctor or a trusted support service as well.
Why does water calm the mind?
Researchers point to soft fascination: water’s movement and sound hold attention effortlessly, resting the mental systems that daily life exhausts, while lowering measurable stress markers like heart and breathing rates.