10 Tips For Swimming Safely Outdoors

By Mark Roberts

Outdoor swimming is more popular than ever these days! More and more of us are re-discovering the child-like joy of swimming in lakes, rivers and waves. Never mind all the health benefits!

But like most outdoor activities, it’s sensible to have a bit of knowledge under your belt before you take the plunge for the first time. We’ve put together some tips on how to enjoy wild swimming safely, with help from our friends at the Outdoor Swimming Society, Alpkiteer Colin Hill and Alpkit Keswick Manager Abby .

10 Wild Swimming Safety Tips

  1. Do Your Research
  2. Check The Weather Forecast And Tide Times
  3. Tell Someone Where You’re Going
  4. Don’t Swim Alone
  5. Check The Water Conditions
  6. Dress For The Swim Length And Conditions
  7. Bring Safety Equipment
  8. Get In Slowly
  9. Know Your Limits
  10. Bring Warm Clothes And A Hot Drink
Outdoor swimming in Derwent Water, the Lake District

1) Do Your Research

When we think of wild swimming, we nearly always think of some deserted mountain tarn (or glyn or lochan!) glinting enticingly in the sun. Following the crowd might sound like the last thing you want to do, but it always makes sense to swim in well-known spots when you’re first dipping your toes outside.

Guidebooks (like Wild Swim by Kate Rew) and websites, social media groups and forums, and old-fashioned word of mouth are a great way to find safe local swimming spots and learn of any hazards that may be present. If you’re swimming in the sea for the first time, it’s always safer to head to a lifeguarded beach. You can always head somewhere more remote when you’ve got a bit of experience under your belt (or tow-float waist strap!).

Shivering whilst outdoor swimming in Derwent Water in the Lake District

2) Check The Weather Forecast And Tide Times

Swimming spots can change considerably depending on the weather. Water temperature will be your main determining factor, but cool air temperatures and wind can have a significant chilling effect – as well as whipping up some serious chop.

The Outdoor Swimming Society (OSS) warn that “rainfall can drastically alter the risk profile of a river swim. For example, high rains before your swim can bring faster currents, pollution, and change a river from one where it was possible to swim back upstream to a getting out point to one where you are swept along by the current.” And when swimming in the sea, you should only ever swim in an incoming tide (moving from low tide to high tide). Magic Seaweed provide detailed tide forecasts and timetables.

Using a phone in a Hydra Wallit waterproof phone case

3) Tell Someone Where You’re Going

It’s always a good idea to let someone know where you’re going if you’re doing anything remotely risky outdoors – and that definitely applies to swimming in freezing cold bodies of water! The RNLI recommend using the RYA SafeTrax App. This tracks your swim and alerts the emergency services if you don’t get home on time.

Outdoor swimming in Derwent Water in the Lake District

4) Don’t Swim Alone

Author of Swimming Wild in the Lake District Suzanna Cruickshank says "never swim alone. Besides, it is more fun swimming with a friend!" Swimming with someone else means you can keep an eye on each other, and there’s always someone on hand to ring for help if either of you get into trouble. It’ll also be more of a laugh – that’s important too!

Crawling out the water, outdoor swimming in Derwent Water in the Lake District

5) Check The Water Conditions

The first thing you should do when you arrive at your swim spot is scan the area for hazards (bouncing rocks, fallen trees, tangly weeds and toxic blue-green algae) and identify some exit points – it’s no different to planning escape routes on a hill walk. The OSS offer some really useful advice on safe swimming if you’d like to know more.

If you’re swimming in rivers, check which way the current is flowing first and gauge whether you can swim faster than it. The OSS advise that you “see where the current is fastest, see where is shallow and where is deep and throw sticks or leaves in to check the speed of the flow.” If you’re swimming in the sea, learn how to identify rip currents and best practice for dealing with them.


Outdoor swimming neoprene skull cap
Outdoor swimming neoprene gloves
Outdoor swimming neoprene boots

6) Dress For The Swim Length And Conditions

You can probably get away with just swimwear for quick dips or shorter swims in summer and autumn – the water temperature is usually at its warmest by mid-Autumn. But for longer swims, especially in the colder months, you will need a wetsuit. Our neutral Terrapin and buoyant Lotic wetsuits are both designed for year-round short to medium length swims. Whereas our insulated Silvertip wetsuit is designed for longer swims and colder water. You can find out more in our guide to outdoor swimming wetsuits.

Alpkit Keswick Manager Abby swims year-round in the Lake District’s waters and tarns and she recommends that you “cover all extremities: hands, feet and head for longer swims. For more leisurely swimming? Wear a bobble hat!”

Outdoor swimming Nori tow float

7) Bring Safety Equipment

Tow-floats are a handy bit of kit to improve your safety,” says Alpkiteer and Open Water Swimming Guide Colin Hill. “By wearing a tow-float, you are more visible if there is boat traffic on your body of water. And if you get cramp or need a bit of a rest, you can float on them like my kids do! They aren’t life saving devices, but they do help with visibility and support if needed.”

It’s always a good idea to wear a brightly coloured swimming cap for extra visibility. And you can take your phone in a waterproof pouch – just in case you need to contact someone in an emergency. Ear plugs and nose clips help keep out waterborne nasties in unclean water. And some people swear drinking a can of coke kills anything that might unsettle your stomach (but the jury's out on that one!).

Getting in the water slowly at Derwent Water, the Lake District

8) Get In Slowly

Your body can go into cold water shock in any temperature below 15°C (the average UK sea temperature is just 12°C). Your body produces an involuntary gasp reflex if you jump or fall suddenly into cold water. Getting in slowly allows your body to adjust and gives you a chance to control your breathing. Splashing yourself with water in the shallows also helps your body to adjust to the water temperature. You can ‘help’ your mates by splashing them too!

Getting into a very cold pool, wild swimming in Devon

9) Know Your Limits

Colin Hill knows a thing or two about staying safe in the water. As well as being an experienced swimming guide and event organiser, he completed a solo crossing of the English Channel in 10 hours 30 minutes. Colin says, “know your limits – you should be a confident swimmer when you’re dipping into open water for the first time. The depth can go from knee deep to very deep in one step and you can’t always see the bottom.”

Keeping close to the river bank or lake/sea shore means it’s easier to get out if you get cold, tired or stuck in a current. “Start with really short distances and build up as your experience grows,” says Colin. “This will help with judging how you cope with the cold and fitness.” Hypothermia is rare for shorter swims (around 30 minutes) but wobbly arms and legs from cold muscles is pretty common in open water.

Getting warm after wild swimming in Devon

10) Bring Warmth Clothes And A Hot Drink

Pack a towel and some warm, dry clothes so you can get changed as soon as you get out. “You want to get warm and dressed as quickly as possible,” says Alpkit Keswick manager, Abby. “There’s nothing worse than getting tangled and stuck trying to get underwear on! Wear loose/baggy warm clothing that’s easy to pull on afterwards. And, speaking as a female: DITCH THE BRA!”

Warm drinks might not warm your core up on a strictly medical basis, but you’ll definitely feel warmer with a steaming mug of tea, soup or hot chocolate. Or you could bring a Brukit camping stove so you don’t end up with the infamous stale ‘flask tea’! A sugary treat always goes down well too, if there are no cafes nearby.

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