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Nestled along Morocco's southwestern Atlantic coast, Agadir occupies a strategic position at the mouth of the Souss River valley, where the Anti-Atlas Mountains meet the ocean. This coastal city sits at a modest elevation of approximately 20-50 meters above sea level, with its urban core extending inland toward the foothills. The surrounding landscape creates a distinct geographic funnel: to the north and east rise the rugged Anti-Atlas ranges, while to the south stretches the arid Souss plain, a major agricultural zone known for citrus groves, argan plantations, and greenhouse farming. This terrain configuration significantly influences air quality patterns. The city's coastal location provides natural ventilation from prevailing northwesterly sea breezes, which typically disperse pollutants seaward. However, during certain meteorological conditions, the mountains can act as barriers, trapping urban emissions within the valley basin. Agadir's urban-rural gradient is pronounced, with dense commercial and residential districts along the coast transitioning rapidly to peri-urban areas and then to extensive agricultural lands. The city's port and industrial zones, though not heavily industrialized compared to northern Moroccan cities, contribute to localized pollution sources alongside typical urban emissions from transportation, construction, and residential heating. The proximity to both ocean and mountains creates microclimates that alternately cleanse or concentrate airborne particulates, making Agadir's air quality highly dependent on wind patterns and thermal inversions.

Agadir's air quality follows distinct seasonal patterns shaped by its Mediterranean climate with Atlantic influences. During winter (December-February), cooler temperatures and occasional thermal inversions can trap pollutants near the surface, particularly during calm mornings when cold air settles in the Souss valley. This season sees increased residential heating emissions, though coastal breezes typically disperse accumulations by midday. Spring (March-May) brings generally excellent air quality as prevailing northwesterly winds intensify, sweeping urban pollutants out to sea while agricultural activities in the surrounding plains remain moderate. Summer (June-August) presents a mixed picture: strong maritime winds provide excellent ventilation, but increased tourism traffic and occasional dust intrusions from the Sahara (known locally as Chergui winds) can temporarily elevate particulate levels. These Saharan episodes typically occur in July or August and may last several days. Autumn (September-November) sees transitional conditions with decreasing winds and the onset of agricultural burning in surrounding farmlands, potentially leading to smoke plumes that drift into urban areas. Sensitive groups—including those with respiratory conditions, children, and elderly residents—should monitor conditions during winter inversion periods and summer dust events. The best months for outdoor activities are typically April-June and September-October when ventilation is optimal and pollution sources minimal. During peak pollution episodes, limiting strenuous outdoor exercise and keeping windows closed can reduce exposure risks.