Plan ahead if you’re thinking about visiting the National Park. Read our Advice to Visitors.

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While lockdown restrictions continue to ease, it’s important to keep up to date with the latest Scottish Government guidance. Please plan ahead before you visit the National Park and read our advice for visitors.


Open water swimming

With 22 lochs, the National Park is the perfect place to enjoy an invigorating and inspiring swim. Open water swimming in particular is a popular activity, and each year thousands of people take the plunge during mass participation events in Loch Lomond.

Advice for open water swimming

Throughout the summer you will see groups of people donning wetsuits and bright coloured caps before taking to the water either to train for a competition or just for fun.

With more people than ever before braving the waters, there are clubs and smaller scale events to help you get started. Whether you’re a tentative beginner or an experienced open water swimmer, it’s essential that you’re well prepared before getting in the water:

Whether you are an experienced open water swimmer or just fancy dipping your toes in to cool off; it’s essential that you’re well prepared before getting in the water. Before you head out read our guide on how to have fun and stay safe in the water.

  • Some places are better than others for swimming. Avoid busy boating/ferry areas where possible. Milarrochy Bay on East Loch Lomond is a popular site.
  • As you are low in the water, it can be difficult for other water users to spot you. So always wear a brightly coloured swim cap and, if possible, use a swim safety device – these are brightly coloured inflatable bags which you can tow behind you whilst swimming.
  • Swim with at least one other person.
  • Be aware of fishing lines in the water when close to shorelines
  • Where possible, use an escort canoe/kayak which can also display the alpha flag (international sign of diver in the water).
  • Always swim within your own capabilities and be aware of the effects of gradual chilling.
  • Check weather conditions before heading out, a large swell can quickly develop when wind directions change.
  • Blue green algae can be a problem during the warmer months. The relevant Local Authority should be the first port of call for advice if you spot any algal blooms, and SEPA can also be contacted.
  • When swimming in open water, there is a risk that you may develop a rash or itch known as Swimmer’s Itch (Cercarial Dermatitis). This is more common in the summer months and is an allergic reaction to a parasite most frequently found in shallow waters. Drying yourself with a towel on leaving the water can minimise the risk of developing symptoms. Symptoms usually clear up quickly but if they persist please seek medical advice. We would advise people experiencing issues to notify the local authority environmental health team.

If you are planning to swim on Loch Lomond, National Park Rangers will be happy to answer any questions you might have. Contact the Duncan Mills Memorial Slipway in Balloch on 01389 722030.

In an emergency call 999, ask for Police and the rescue boat and provide the exact location of the emergency.

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