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Polignano a Mare, a jewel of Puglia, Italy, is dramatically situated on a limestone cliff overlooking the Adriatic Sea. Its geography is defined by this coastal morphology – a high, rugged plateau abruptly descending to a narrow, pebbled coastline punctuated by sea caves. The town’s historic centre is perched atop these cliffs, creating a unique urban landscape of winding streets and breathtaking views. The surrounding landscape is predominantly agricultural, characterised by olive groves and vineyards, typical of the Murge plateau. While not heavily industrialised, the broader Bari metropolitan area to the north represents a regional industrial hub, potentially contributing to background pollution levels. The urban-rural gradient is sharp; immediately inland lies a rural landscape, while the sea provides a constant, moderating influence. This proximity to the sea, however, can also concentrate pollutants during certain meteorological conditions. The elevation varies significantly within the municipality, from sea level to approximately 40 metres above sea level in the historic centre, influencing local wind patterns and pollutant dispersion. The Adriatic’s prevailing winds play a crucial role in flushing out pollutants, but stagnant conditions can lead to localised build-up, particularly in the sheltered coves and narrow streets.

Polignano a Mare experiences a Mediterranean climate, with distinct seasonal variations impacting air quality. Summer (June-August) generally sees good air quality, driven by consistent Adriatic breezes that disperse pollutants. However, increased tourist activity and associated vehicle emissions can cause localised spikes, particularly in the historic centre. Autumn (September-November) brings a transition period; decreasing temperatures can lead to temperature inversions, trapping pollutants near ground level, especially during calm weather. November often experiences increased particulate matter from agricultural activities like olive harvesting and pruning. Winter (December-February) is typically the wettest season, with rainfall effectively cleansing the air, resulting in the lowest pollution levels. However, calm, damp conditions can also lead to fog formation, trapping moisture and pollutants. Spring (March-May) sees a gradual increase in temperatures and agricultural activity, potentially leading to a rise in pollen and particulate matter. Sensitive individuals, such as those with respiratory conditions, should be particularly cautious during autumn and spring. Avoiding strenuous outdoor activity on calm days during these seasons is advisable. Monitoring local conditions and limiting exposure during peak periods is recommended.