Summer in Europe: One Season, Many Hazards
European summers are anything but uniform. A dog owner in Seville or Athens faces searing temperatures that can exceed 40°C during heatwave events, whilst someone in Ireland or Denmark contends with humid, overcast conditions and an entirely different set of parasite pressures. Tailoring your approach to your region is essential — blanket advice misses too much of what actually puts dogs at risk during the warmer months.
Mediterranean Zone: Heatwave Protocol and Extreme Heat
For owners in Spain, Portugal, Southern France, Italy, Greece, and Malta, summer heat is the primary concern. Southern European heatwaves have become longer and more intense in recent years, with urban heat islands making city conditions particularly dangerous for dogs.
The core rule during heatwaves is to treat your dog as you would a vulnerable person. Walks should be limited to early morning before 8 am and late evening after 9 pm. During peak hours — typically 11 am to 7 pm — dogs should remain indoors with good ventilation or air conditioning. Never leave a dog in a parked vehicle; temperatures inside a car can reach 50°C within minutes even on a moderately warm day.
The seven-second pavement test is a reliable guide: press the back of your hand against the pavement surface and hold it there. If you cannot keep it there for a full seven seconds, it is too hot for your dog's paw pads. Burnt paw pads are painful, slow to heal, and more common than many owners realise during Mediterranean summers. Early morning walks on pavement that has had time to cool overnight are generally safe.
Flat-faced (brachycephalic) breeds such as Bulldogs, Pugs, and French Bulldogs are at severe risk of heatstroke in Mediterranean conditions and should be treated with extra caution — limiting exercise almost entirely during hot weather and watching closely for signs of distress even indoors.
Atlantic Zone: Humidity, Midges, and Swimming Safety
Along the Atlantic coast — encompassing the UK, Ireland, western France, northern Spain, and Portugal — summers are typically cooler but humid. Humidity slows evaporative cooling (panting), making overheating possible even at temperatures that seem moderate. A humid 25°C day can stress a heavily exercised dog as much as a dry 30°C day.
Midges are a seasonal nuisance across much of Atlantic Europe, peaking in summer particularly in Scottish and Irish coastal and upland areas. While midges do not transmit disease to dogs in the way sandflies do, they cause irritation and can provoke allergic reactions in sensitive animals. Avoiding dawn and dusk walks in high-midge areas and considering midge-repellent products designed for dogs can help.
Swimming is a popular and effective way to exercise and cool dogs during summer, but EU lake and river water quality varies significantly. Blue-green algae (cyanobacteria) blooms are an increasingly common hazard in European lakes, reservoirs, and slow-moving rivers during warm summer months, particularly from June to September. These blooms produce toxins that are lethal to dogs — even small amounts of ingested water can cause liver failure and death within hours. Symptoms include vomiting, diarrhoea, seizures, and collapse.
- Check local authority water quality notices before allowing your dog to swim in natural water.
- If the water appears green, blue-green, or has a scummy surface film or unusual smell, keep your dog out.
- Rinse your dog thoroughly with clean water after any natural water swimming session.
- If you suspect algae ingestion, contact your vet immediately — do not wait for symptoms to develop.
Northern EU Zone: Tick Season and Parasite Pressure
In Scandinavia, Finland, the Baltic states, Germany, Poland, and the Netherlands, summer marks peak tick season. Ticks in Northern and Central Europe can transmit Borrelia burgdorferi (Lyme disease), Anaplasma phagocytophilum, and Babesia species — the latter being of particular concern in Eastern Europe. ESCCAP (European Scientific Counsel Companion Animal Parasites) guidelines recommend year-round tick prevention for dogs in moderate-to-high risk zones, with particular vigilance from April through October.
Effective tick prevention involves using a veterinary-recommended product — spot-on treatments, collars, or oral tablets — and checking your dog thoroughly after every walk through woodland, grassland, or heath. Pay close attention to ears, neck, groin, armpits, and between toes. Remove any attached ticks promptly using a proper tick removal tool, twisting rather than pulling to avoid leaving mouthparts in the skin.
Insect Protection Across European Regions
Beyond ticks, the specific insects to guard against depend on where you are in Europe.
- Sandflies (Phlebotomus species) are active in Mediterranean and Southern European countries from May to October. They transmit Leishmania infantum, which causes leishmaniosis — a serious and potentially fatal disease in dogs. ESCCAP guidelines recommend protecting dogs with insect-repellent products (deltamethrin collar or spot-on permethrin), avoiding outdoor activity at dawn and dusk, and vaccination where available.
- Mosquitoes transmit Dirofilaria immitis (heartworm) across Southern and increasingly Central European regions. Dogs in endemic areas should receive monthly heartworm preventive treatment as advised by their vet.
- Processionary caterpillars (pine and oak processionary moth larvae) are active in spring in Mediterranean and increasingly Central European areas. Contact with their hairs causes severe allergic reactions in dogs — keep dogs away from pine and oak woodland when caterpillar processions are visible.
Hydration on Summer Walks
Dogs cannot cool themselves efficiently — they rely almost entirely on panting, which requires adequate hydration to function. A dog that becomes dehydrated on a warm walk can deteriorate rapidly. Always carry fresh water and a portable travel bowl on walks during summer; collapsible silicone bowls are lightweight and practical. Offer water every 15 to 20 minutes during active exercise in warm weather, and allow your dog to set the pace — forced exercise in heat is a common cause of heatstroke.
Summer Grooming
A well-groomed coat actually provides insulation against heat as well as cold, so resist the impulse to clip double-coated breeds such as Huskies, Golden Retrievers, or German Shepherds — the undercoat helps regulate temperature in both directions. What does help is regular brushing to remove dead undercoat that traps heat, and keeping the coat mat-free so air can circulate.
For single-coated breeds, a light trim can be beneficial in very hot climates. Consult a professional groomer familiar with your breed before making any significant cuts.
Summer Travel and Cooling Products
Summer is peak travel season across Europe, and dogs travelling by car should never be left unattended. Use a crate or seatbelt harness, keep the vehicle well ventilated, and plan stops every two hours for water and rest. For long journeys in heat, cooling mats and portable fans can make a significant difference to your dog's comfort. Zooplus offers a wide range of cooling products — including cooling mats, bandanas, and portable water dispensers — designed specifically for dogs during warm weather travel and walks.
With the right preparation for your specific region and your dog's individual needs, summer in Europe can be safe, enjoyable, and healthy for both of you.