Midges at Loch Lomond: When They Bite and What Actually Works

Only female Highland midges (genus Culicoides), measuring 1 to 3 millimeters, bite at Loch Lomond because they require blood to develop eggs; they are attracted to carbon dioxide, body heat, and sweat.

These tiny insects are nearly invisible but their bites leave red, itchy bumps that can last for days. The females are the biting culprits, while males do not feed on blood. Midges breed in damp, marshy soil and stagnant water near the loch’s edges, so low-lying woodland and sheltered spots provide ideal habitats. Although midges in Scotland do not transmit serious diseases, some visitors may visit allergic reactions or prolonged itching. Understanding their behaviour helps visitors prepare properly to reduce discomfort.

For more on midge biology, see the detailed information from the UK National Health Service.

Effective prevention requires applying insect repellents with 20-30% DEET or Icaridin on all exposed skin, wearing long-sleeved, light-coloured clothing, and avoiding outdoor activity at dawn, dusk, or during calm, humid evenings.

Repellents sold locally in shops around Drymen and Balmaha cost between £5 and £15 per bottle and provide several hours of protection if reapplied after sweating or water exposure. Clothing made from tightly woven fabric is essential to limit skin exposure. Head nets or midge hoods are a practical choice for sensitive individuals or when spending extended time outdoors in midge-prone areas like Queen Elizabeth Forest Park (Queen Elizabeth Forest Park). Natural remedies such as citronella candles or essential oils offer minimal deterrence compared to chemical repellents.

The Scottish Government’s advice on insect repellents confirms DEET and Icaridin as the most reliable options.

Treat midge bites by cleansing with soap and water, applying anti-itch creams such as hydrocortisone or calamine lotion, and avoiding scratching to prevent infection.

Cleaning bites promptly reduces the chance of secondary infection. Over-the-counter creams ease itching and inflammation. Oral antihistamines may help if the reaction is severe. Scratching damages the skin and can cause swelling or pus, so it should be avoided. If bites worsen with increasing redness, swelling, or pain, or if signs of infection develop, consult a healthcare professional.

See NHS guidance on midge bite treatment for more details.

Midges concentrate near water, damp woodland, and sheltered low-lying areas around Loch Lomond, particularly close to the shores and forest trails near Drymen and Balmaha.

These biting insects breed in marshy soils and stagnant water patches, so the edges of the loch and the thick undergrowth beside paths in Drymen and Balmaha visit higher midge activity. Villages on higher ground or with less damp surrounding land, such as Aberfoyle (Aberfoyle) and Gartocharn (Gartocharn), tend to have fewer midges. Open and windy spots like Conic Hill (Conic Hill) are noticeably less affected. Walkers should plan routes to avoid dense woodland during peak times.

Locals recommend scheduling outdoor activities during midday or when it is windy, using physical barriers like midge nets, and choosing accommodation with insect-proofing in villages such as Aberfoyle and Gartocharn.

Many residents avoid evening outdoor activities during the summer months, preferring to stay indoors or in well-ventilated pubs and cafes. Some local lodges provide midge traps or advice on the best times to be outside. Carrying repellent and a head net is standard practice during June and July. Staying in villages on higher or less marshy ground can reduce encounters.

Accessing Loch Lomond in summer is possible by car, train, or bus, with key points including the villages of Drymen and Balmaha and the Balloch train station at the southern end of the loch.

The A811 and A82 roads serve the western and eastern shores, with pay-and-display parking in village centres typically charging between £1.50 and £3 per hour. Balloch station, at the loch’s southern tip, connects with regular buses to places like Drymen (Getting to Drymen) and Balmaha. Glasgow and Stirling both offer direct bus routes to Loch Lomond villages, enabling day trips without a car. Walking from transport hubs to lochside attractions usually takes 10 to 30 minutes.

Public transport timetables are available at ScotRail and Stagecoach Bus.

Bringing insect repellent, dressing in suitable clothing, and monitoring weather forecasts that include wind speed and humidity will help minimise midge annoyance.

Local pharmacies and outdoor shops in Drymen sell repellents with DEET or Icaridin for £5-£15 a bottle. Lightweight, long-sleeved shirts and trousers made from tightly woven fabric protect skin without overheating. Windy conditions reduce midge activity, so checking wind speed forecasts is useful, particularly for hill walkers and boaters. Visitor centres in Balloch and Drymen often provide up-to-date information on midge levels. Carrying anti-itch creams can ease discomfort if bitten.

Tours that schedule activities during midday and include boat trips tend to reduce midge encounters by avoiding peak biting times and moving visitors away from woodland breeding grounds.

The Loch Lomond Scottish Highlands Full Day Sightseeing Tour features boat cruises and visits to less midge-prone areas. The Edinburgh Loch Lomond Family Adventure Day Tour plans activities to avoid dawn and dusk. Guides familiar with local conditions choose routes with lower midge density and advise on personal protection. Booking these tours can be a practical option for those sensitive to midges or unfamiliar with the area.