Staying cool in a camper in southern Europe: ventilation, shade, fridge and water
A van heats quickly and cools slowly. Parking, airflow, the fridge, water and driving times matter more than any single gadget.
By CampingSpirit Editors · September 6, 2026 · 5 min read
A camper is a thin metal or composite box with large windows, and in July in Spain, Italy or Greece it behaves like a greenhouse. The sun heats the roof and walls through the day, the interior stores that heat, and by evening the air inside can feel warmer than the air outside. Most solutions therefore aim at two things: keeping the heat from getting in, and letting it out when the outside air cools.
The following measures are practical rather than technical. None of them requires special equipment, though a few inexpensive items help considerably.
Park for shade and wind
The first decision is where to stop. Shade from trees or a building during the afternoon is worth more than any accessory. Face the vehicle so that the large glass areas and the side with the fridge vents are out of the sun, and if possible position it so that any breeze passes through. A pitch on a campsite with trees can be several degrees cooler than an open car park, and many campsites in hot regions offer shaded pitches at a slight premium. If a shaded pitch is not available, it is sensible to move the vehicle during the day as the shadow shifts.
Block the sun from the outside
Heat that has entered through the windscreen is hard to remove. External reflective covers for the windscreen and cab windows, and reflective screens for the habitation windows, keep the sun from reaching the glass at all. Internal blinds help less, because the heat is already inside the vehicle. A light-coloured vehicle, an awning positioned to shade the door side, and a white or silver cover over a roof light all reduce the heat load. Keep the awning pegged and lowered or retracted when you leave, since afternoon winds can damage it.
Ventilate with a plan
Roof vents and windows should be opened in a way that creates a through-draught: a vent open at the front and another at the back, or a window on the shaded side and a roof vent. Warm air rises, so roof vents with a fan let it escape; insect screens allow the vents to stay open at night. During the day, if it is hotter outside than inside, it is better to keep the vehicle closed and shaded and to ventilate when the outside air cools down in the evening and early morning. Open all vents for an hour after sunset to flush out the stored heat before going to bed.
The fridge at high temperatures
Absorption fridges lose performance as the ambient temperature rises. Dometic notes that once the ambient temperature goes above roughly 32 degrees Celsius, the internal temperature of its absorption fridges will inevitably suffer. The manufacturer’s suggestions are to park with the vent area out of the sun, to remove the vent grilles for more airflow, and to consider an extra fan kit. Pre-cool the fridge before a trip, avoid opening it often, and keep it well stocked but not packed, so that air can move. Treat raw meat, fish, dairy and cooked food with caution in hot weather; if the fridge has been struggling, it is better to discard doubtful food than to risk it.
Water, driving and tyres
In hot weather people drink much more than usual, so plan fresh water capacity with that in mind and refill whenever the opportunity arises. Water stored in a tank in the sun becomes warm; a bottle in the fridge is more refreshing than the tap. Never leave a pet or a child in a parked vehicle, even for a short time and even in the shade.
When driving, start early and finish early. The central hours of the day are the hottest, the roads are busiest on summer weekends, and an engine under load in a heavy vehicle runs hotter. Check coolant and oil before long journeys, and keep an eye on the temperature gauge on long climbs. Tyre pressure rises with temperature, so check it when the tyres are cold, against the figure in the vehicle’s handbook or on the placard, and look at the age and condition of the tyres, because heat and load are demanding on old rubber.
Warnings and the signs of heat exhaustion
National weather services issue heat warnings. Météo-France, for example, uses a four-level colour system of green, yellow, orange and red, with canicule among the nine phenomena it covers, and similar services exist in Spain, Italy, Portugal and Greece. Looking at the warning for the day before leaving the campsite is a simple habit.
The UK’s NHS describes the signs of heat exhaustion as tiredness, dizziness, headache, nausea, pale and clammy skin, muscle cramps, a high temperature and intense thirst. The advice is to move the person to a cool place, remove excess clothing, give plenty of water and cool the skin with sprays, sponges or fans, with recovery usually within 30 minutes. Heatstroke is an emergency: a very high temperature, hot skin without sweating, confusion, seizures or loss of consciousness require emergency services immediately, using 112 in the European Union.
A hot-day routine
A workable routine looks like this. Drive in the early morning. Arrive at a shaded pitch by early afternoon. Fit the reflective covers, open the vents on the shaded side, and spend the central hours of the day at the water, in a museum or in a shaded café rather than in the vehicle. In the evening, flush the van with air, cook outside the sleeping area if allowed, and sleep with a sheet instead of a duvet. Keep a thermometer inside; if the cabin stays above a comfortable level at night for several days, it is time to move north or higher up.
