According to forecasts in the Pollen Bulletin published by the Portuguese Society of Allergology and Clinical Immunology (SPAIC), the whole of mainland Portugal will be at low to moderate risk of pollen concentrations between 8 and 14 May, particularly from olive, pine, birch, cork oak and oak trees, and from grasses, plantain, sorrel, nettle and Urticaceae (including pellitory).

North and Centre

This forecast extends to the Trás-os-Montes and Alto Douro region (particularly Vila Real), Porto (Entre Douro and Minho region), Coimbra (Beira Litoral region) and Castelo Branco (Beira Interior region), for the same trees and grasses.

Lisbon Region

In Lisbon (Lisbon and Setúbal region), atmospheric pollen concentrations remain low to moderate for olive, pine, cork oak and oak trees, and for grasses, sorrel, plantain, nettle and Urticaceae (including pellitory), but also include Chenopodiaceae.

In the Alentejo

In Évora (Alentejo region), pollen concentrations will also be low to moderate, but only for olive, pine and cork oak trees, as well as grasses, sorrel, plantain, goosefoot, nettle and Urticaceae (including pellitory).

In the Algarve

In Faro (Algarve region), pollen concentrations will also be low to moderate for olive, pine, cork oak and oak trees, as well as for grasses, sorrel, plantain, goosefoot, nettle and Urticaceae (including pellitory).

In the Autonomous Regions

In Funchal (Autonomous Region of Madeira), atmospheric pollen concentrations will be low, with a particular focus on pollen from cypress, pine and eucalyptus trees, and from grasses, plantain, goosefoot, nettle and Urticaceae (including pellitory).

In Ponta Delgada (Autonomous Region of the Azores), pollen concentrations in the atmosphere will be low, but only for cypress (and/or cryptomeria) and pine trees, and for grasses, plantain, nettle and Urticaceae (including pellitory).