While walking in Coimbra, people may see something soft and white flying around, but because of the weather, it is certainly not snow.

Those who live in Coimbra know that when Spring comes, when the wind blows, the pollen of the trees flies around the city, covering the whole city with that white dust. It is common to see people covering their noses and mouths because dust often lands on their lips or noses, which can trigger symptoms for those who suffer from hay fever.

Some of the pollen lands on the Mondego River, which may seem like foam, but a close look at the water reveals that the dust has simply decided to rest by the closest fresh water source.

It is unpredictable when it stops flying around; however, Coimbra residents are used to this phenomenon that hits the city every year.

Pollen concentration

According to the Sociedade Portuguesa de Aerobiologia, pollen concentrations are high in Coimbra and across mainland Portugal.

For those who suffer from respiratory allergies, the entity advises checking its website and planning activities based on air conditions. The windows must be shut to prevent pollen from entering the house. Avoiding outdoor activities is also a way to prevent health conditions, as is wearing sunglasses to avoid possible reactions in the eyes.