Pollen Count & Forecast for Heraklion

Heraklion’s spring allergy season (March-May) is dominated by Olive and Pellitory-of-the-wall pollen; Olive (Olea europaea) abundant in rural groves near Knossos; Pellitory-of-the-wall (Parietaria) common on the Venetian Walls. Oak (Quercus) contributes significantly from the slopes of Mount Juktas. Summer (May-July) sees high Grass (Poaceae) pollen levels, originating from fields near the Giofyros River and Georgiadis Park.

Meltemi winds from the north carry pollen across the coastal plain; narrow streets in the old town trap these particles. Autumn and winter see elevated Mould (Alternaria, Cladosporium) spore counts, from moisture in the port area and leaf decay in Karteros Gorge.