Having a baby nap outdoors is common practice in Denmark, Norway, Sweden, and Finland. The child is placed in a pram, on a balcony, or in a garden, warmly dressed, even in below-freezing temperatures. Parents say they sleep longer and breathe better.
The question for a French parent is simple. Is this habit based on evidence, and can it be adopted here without taking risks? Here is what we know, what we do not know, and the conditions to follow.
Where does outdoor napping come from?
In Finland, the practice spread from the 1920s onward. Pediatrician Arvo Ylppö, founder of Finland's network of infant health clinics, recommended it as a way to combat respiratory infections in overcrowded, poorly ventilated homes.
It then became a social norm. Today, in much of Scandinavia, prams parked outside cafés or nurseries do not surprise anyone. Some Nordic nurseries organize outdoor naps all year round.
So this is not a childcare method marketed by someone. It is an old cultural habit that emerged from a specific public health context.
What does the available research say?
The most comprehensive research comes from the University of Oulu in Finland. Marjo Tourula devoted a thesis and several articles to this practice between 2008 and 2013.
The most frequently cited result concerns duration. Naps taken outdoors are longer than those taken indoors, sometimes significantly so. The Oulu research places the temperature associated with the longest naps at around minus five degrees.
A second part of the research focused on the children's skin temperature and the actual insulation provided by their clothing. The aim was to check that the children did not become too cold. The measurements show that the clothing used by families served this purpose under the conditions studied.
What this research does not demonstrate
The scope of these findings must be stated precisely. These are small observational studies conducted in a particular climate and culture. They describe a practice; they do not prove a health benefit.
No robust evidence establishes that outdoor naps reduce respiratory infections. The commonly proposed explanation—that cold outdoor air contains fewer viruses than the confined air inside a room—is plausible but has not been demonstrated in infants.
Finally, a longer nap is not automatically a better nap. For a child who has difficulty sleeping at night, lengthening naps may shift the problem rather than solve it. We discuss this balance in our article on organizing baby's naps.
Is it safe to let a baby sleep outdoors?
Safe sleep rules do not change just because the child is outdoors. They apply in exactly the same way and take precedence over any cultural considerations.
The child sleeps on their back, on a flat, firm surface, without a pillow, carrycot bumper, or blanket that could rise over their face. These points are explained in detail in our article on safe infant sleep.
Three risks specific to being outdoors must also be considered. The first is overheating, which is more common than becoming too cold: an overdressed child in an enclosed carrycot in the sun. The second is blocked airflow caused by a blanket placed over the canopy for shade. The third is a lack of supervision.
Conditions to meet
Supervision must remain effective. An audio or video baby monitor, an open window, or regular checks: the child must never be out of reach.
Dress the child in layers, using a simple check. Touch the back of the child's neck, not their hands or feet, which are always colder. The neck should feel warm and dry. If it is damp, there is one layer too many.
The face must remain uncovered and exposed to the open air. No blanket over the canopy, and no closed rain cover when it is not raining. Air circulation takes priority.
Finally, keep the duration reasonable. A nap, not an entire morning. Do not nap outdoors in strong winds, on icy surfaces, during a pollution spike, or when the child is ill or has a fever.
At what age and in what temperatures?
There is no official French temperature threshold. Nordic practices generally wait until the baby is a few weeks old and has established weight gain. Newborns have difficulty regulating their temperature, which calls for caution.
In terms of temperature, Nordic families often stop at around minus ten degrees. In France, the question rarely arises in those terms. The country's temperate climate makes it much easier: a nap on a balcony at five degrees, with the child dressed appropriately, presents no particular difficulty.
The opposite situation is actually more challenging here. In summer, a carrycot left in the sun heats up very quickly. We explain these precautions in our article on babies and hot weather.
Should you do it?
There is no obligation, and no evidence that a child who never naps outdoors is disadvantaged. It is an option, not a standard.
It nevertheless offers practical benefits for some families. It solves the problem of household noise during nap time. It allows a parent to stay outside with an older child. It avoids having to bring a sleeping child indoors after a walk.
If the idea appeals to you, start small: twenty minutes on a balcony, in dry, mild weather, within sight. Observe. Some children sleep better, others do not. It is the same gradual approach used for first outings, which we describe in our article on first outings with a newborn.
What about when returning indoors?
The waking time after the nap is usually spent on the floor. This is where most motor development takes place, and a clean, washable, cushioned surface makes things easier, especially when alternating between outdoors and indoors.
The criteria that distinguish a good play surface from a poor one are detailed, material by material, in our guide to foam mats for babies.
One final seasonal point to keep in mind. In winter, the spread of respiratory viruses remains the real issue, well before nap-time temperature. We covered this in our article on preventing bronchiolitis.
Other practical questions are answered in our FAQs.
Sources
Tourula M. et al., “Infants sleeping outdoors in a northern winter climate: skin temperature and duration of sleep,” Acta Paediatrica, 2010. Tourula M., “The childcare practice of children's daytime sleeping outdoors in the context of northern Finnish winter,” doctoral thesis, University of Oulu, 2011. Tourula M., Pölkki T., Isola A., “The Cultural Meaning of Children Sleeping Outdoors in Finnish Winter,” Journal of Transcultural Nursing, 2013. Haute Autorité de santé, recommendations on safe infant sleep.
