I swapped my morning walks for early swims for 2 weeks - and noticed 5 surprising benefits

The sea is mirror-like as the first rays of sunshine cast a golden shadow across the Cornish coastline. Although it's July, the cold water is enough to make me gasp. But as I look out towards the horizon, I can't imagine a much better way to begin the day.

“It's beautiful, isn't it?” says a woman as she swims past. I smile and nod before stepping into the water and spending the next 30 minutes swimming, alternating between breaststroke, front crawl and simply floating on my back. It's a world away from my usual early morning walking routine.

While I grew up in Falmouth, Cornwall, these days I live near the hilly Pennines in the North of England, where I spend mornings walking. I try to pull on my walking shoes before emails and deadlines take over. Even if I can only get out for 10 minutes of walking, it's a daily reset. It gives me a chance to clear my head and move before hunching over a laptop for the rest of the day.

Swimming was often in my routine as a teenage club swimmer, but I moved inland as an adult. It had been years since I'd swum before breakfast, and I found I had missed it. Walking will always be one of my favourite ways to enjoy nature and clear my mind, but swimming offers something entirely different. Immersed in the water, it's a complete sensory escape, and I wanted to find out why.

Whether you’re tempted by the sea, a lake or your local pool, I asked the experts why an early swim can do as much for your mind as it does for your body, long after you've dried off.

Benefits of a morning swim

1. It calms your mind before the day begins

Every morning swim started with the same negotiation: "it's too cold" or "I'll go in tomorrow", yet I never once regretted it once I found the courage to get in. Within minutes of entering the water, the mental chatter faded.

Researchers describe the restorative effect of nature as ‘soft fascination’, when natural surroundings gently capture your attention, allowing the brain to recover from mental fatigue. Walking can create this effect, but swimming amplifies it.

“Sounds become softer and more muted, while your visual perspective shifts compared with being on land. There is something inherently calming about being supported by the water; it can feel both physically relieving and mentally freeing, creating a sense of relaxation that is difficult to replicate in other forms of exercise,” says Celia Boothman, a certified triathlon coach and IRONMAN ambassador.

When your face touches cold water, the mammalian dive reflex is triggered. "It's an evolutionary survival mechanism designed to protect your brain and heart from oxygen deprivation," says Celia. "The heart rate drops, your blood vessels constrict and breathing changes. The initial shock can feel intense, but the effect is a sense of calm and reduced anxiety.”

That explains why I climbed out of the water feeling noticeably calmer and more at peace with the day. Any worries I’d woken up with had been left behind in the water.

2. It helps you feel more focused

Morning swims help you feel mentally and physically buoyed too, which can improve your concentration and decision-making for hours after you get out of your swimwear.

“A morning swim doesn’t solve all my problems, but it gives me a few minutes each morning where I feel grounded, capable, and connected. I always come home better able to deal with whatever is waiting for me,” says Sophie Hellyer, former professional surfer, outdoor swimmer and Dryrobe ambassador.

The cool temperature of water also releases endorphins and norepinephrine, which are the brain's natural 'feel-good' and focus chemicals.

“You’ll find that after a morning swim, you’ll have a reinvigorated, sustained mood boost, which is longer lasting than the peak and crash of a morning espresso. That calm, resilient energy can often stay with you all day,” says Celia.

But it's not just a feeling. Celia notes that just 20 minutes of moderate-intensity breaststroke has been shown to improve visuomotor performance, which includes hand-eye coordination, visual reaction time, and spatial awareness.

“The study also found swimming can acutely enhance cognitive function. In other words, a morning swim doesn't just wake up your body, it can also sharpen your mind and set you up for a more productive day.”

This was hugely beneficial for me, as someone who procrastinates. Back at my desk, I wanted to crack on with my to-do list and was more ready to do so than I had been the previous week.

3. Swimming is a full-body workout

One of the biggest benefits of a swimming workout is that it works almost every major muscle group, from your shoulders and back to your core and legs. Yet, the water's buoyancy reduces the strain on your joints and muscles, so it's a low-impact workout.

“Being in the water provides your body with a unique sense of support. The feeling of weightlessness reduces the impact on your joints and muscles. Hydrostatic pressure, a gentle, even pressure around the body, acts like a mild compression garment, helping to improve circulation and reduce swelling and inflammation,” says Celia.

If you want to improve your cardiovascular fitness and strength without too much impact on your joints, then a morning swim is the workout for you. I was happy to be waking my body up without feeling like I'd put it through a gruelling workout.

“You walk out feeling open through the chest, long through the spine and like your body’s been oiled rather than battered,” says Samantha Russo, an elite swim coach at Virgin Active UK who loves seeing more women over 40 discover swimming.

“As the upper back and shoulders become stronger, people stand taller and develop a different relationship with their body. Instead of asking, ‘What do I look like in these leggings?’, the question becomes, ‘What can my body do today?’ That’s powerful at any age, but especially through perimenopause and beyond.”

Water is considerably denser than air, creating natural resistance without the need for weights or high-impact movements. However, swimming isn't a weight-bearing exercise. That's why experts recommend combining swimming with progressive strength workouts, at the gym or at home, to help build stronger muscles and bones.

4. It helps healthy habits stick

Building new habits takes time. Celia is a big believer in making them as easy as possible to stick to. “For many people, mornings are the ideal time to establish a routine because they're generally free from the distractions, competing priorities and decisions that build up as the day goes on. By setting aside time for yourself first thing, you're less likely to let other commitments get in the way and by removing barriers and making the decision the night before, you're much more likely to follow through when the alarm goes off,” she says.

“Consistency isn't about relying on motivation every morning, it’s about creating a routine that makes the healthy choice the easiest one.”

Her advice is simple: Pack your swim bag, lay out your kit and leave everything by the door.

I'd also recommend a swim hat, goggles, and a flask of warming tea if you're heading out in chillier weather.

5. A morning swim is good for sleep

After just a few days of morning swims, I was falling asleep more easily, staying asleep for longer, and waking before my alarm feeling ready for the day. This isn't necessarily about swimming, but it is about swimming in the morning.

Morning light plays a key role in regulating your circadian rhythm, your body's internal clock and exercising first thing outdoors is a great way to expose yourself to natural light early in the day, says Celia. This helps encourage the body's sleep-wake cycle, and may help you sleep better in the evenings.

“While any exercise will increase cortisol to some degree, moderate-intensity activities like swimming generally produce a smaller stress response than more intense forms of exercise," she says. "This means you can enjoy the physical and mental benefits of exercise without placing as much additional stress on your body."

Getting outside for a morning swim also requires you to set an alarm, she notes, and this "consistent wake-up time promotes healthier sleep patterns, making it easier to fall asleep at night, improve sleep quality, and wake up feeling more refreshed".

I'm not sure whether it was the combination of daylight, fresh sea air or the swim itself. Instead of lying awake at 3 am with a racing mind, I felt genuinely sleepy at bedtime and slept more soundly through the night. I also found myself waking naturally around 5.30 am, feeling refreshed rather than groggy and ready for the day, and a dip.

Morning walks vs morning swims

Morning walks will always have a place in my routine, but swimming has earned one too. My aim now is to swim two or three mornings a week before breakfast, which feels realistic. I may not have the sea on my doorstep, but my local pool offers many of the same physical and mental benefits.

As autumn arrives and temperatures drop, an indoor pool will undoubtedly feel more inviting than open water, and having another way to move before breakfast means I can choose what suits my mood, the weather and my body that day. That's a habit worth holding on to.

As Samantha says, morning swimming isn’t about being 'disciplined' or 'hardcore'. It’s about gifting yourself a pocket of time where your body moves, your mind softens, and the day hasn’t had a chance to take over yet.

"Whether you give yourself 10 minutes of swimming or 40, whether you’re gliding serenely or stopping often to catch your breath, you’re still doing something profoundly kind for your future self when the rest of the world is still sleeping," she says.