“Given the flowering and pollination of plants, at this time of year, high to very high concentrations of pollen are expected in the atmosphere of the mainland regions”, says SPAIC.

According to forecasts until Thursday (28th), in Porto (Entre Douro e Minho region), pollens are at high levels, with a predominance of pollens from oak, pine and birch trees, and nettle grass, followed by pollens from parietaria herbs and grasses.

In Vila Real (Trás-Os-Montes and Alto Douro region), pollens are also at high levels, with pollens from oak, pine and birch trees, grass and parietaria trees predominating.

Also in Coimbra (Beira Litoral region), pollens are found at high levels, with a predominance of pollens from the oak tree and nettle grass, pine tree and parietaria grass.

In Beira Interior, pollens are also found at very high levels, with emphasis on pollens from holm oak and other oak trees and from nettle grass, plantain and grasses and from the pine tree.

The bulletin also predicts very high levels in the Lisbon and Setúbal region, with a predominance of pollens from oak, olive and nettle grass, parietaria grasses, grasses and chenopodium and pine trees.

In the Alentejo region, SPAIC highlights pollens from holm oak and nettle grass, followed by pollens from plantain, parietaria and grasses.

In Faro (Algarve region), also with very high levels, pollen from olive, holm oak and other oak trees and from nettle grass, plantain herbs, grasses and chenopodium and from the pine tree predominate.

Low levels of pollen in the atmosphere are expected for the Azores and Madeira Archipelagos.

According to SPAIC, outdoor activities should be avoided when pollen concentrations are high.

“Walking in the garden, mowing the lawn, camping or playing outdoor sports will increase your exposure to pollens and your risk for allergies”.