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Vilankulo, a coastal city in Inhambane Province, Mozambique, occupies a unique geographic position along the Indian Ocean. Situated at approximately -22.0000 latitude and 35.3167 longitude, the city benefits from a warm, tropical climate and a relatively flat coastal terrain. The Bazaruto Archipelago, a stunning collection of islands, lies just offshore, significantly influencing local wind patterns and marine ecosystems. Vilankulo’s urban character is defined by a blend of traditional Mozambican architecture and growing tourism infrastructure. The surrounding landscape is dominated by coastal forests, mangrove swamps, and sandy beaches, transitioning inland to miombo woodland. While not heavily industrialized, the city serves as a gateway to the resource-rich interior, with some small-scale processing of agricultural products like cashews and coconuts. The urban-rural gradient is pronounced; as one moves away from the city centre, the density decreases rapidly, giving way to smallholder farms and fishing villages. This proximity to the ocean means sea spray contributes to particulate matter, while limited industrial activity and reliance on biomass for cooking are primary sources of localised pollution. The prevailing southeast trade winds play a crucial role in dispersing pollutants, but can also carry dust from inland areas during the dry season, impacting air quality.

Vilankulo experiences a distinct wet and dry season, heavily influencing its air quality. The wet season, typically from November to April, brings relief from dust and a temporary improvement in air quality due to rainfall scavenging pollutants. However, increased humidity can also foster mould growth, impacting respiratory health. The northeast monsoon winds dominate this period, bringing moisture from the Indian Ocean. The dry season, from May to October, sees a significant deterioration in air quality. Lower rainfall means pollutants accumulate, and the southeast trade winds carry dust from the interior. August and September are often the dustiest months, posing a risk to those with respiratory conditions. Temperature inversions, common during cooler nights in the dry season, trap pollutants near ground level, exacerbating the problem. Outdoor activity is best suited during the wet season, particularly after substantial rainfall. Sensitive groups – children, the elderly, and those with pre-existing respiratory illnesses – should limit outdoor exposure during the dry season, especially on windy days. Burning of agricultural waste during land preparation in the early dry season also contributes to localised smoke pollution, requiring caution.