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Manokwari, the capital of Papua Barat province in Indonesia, occupies a strategically important coastal position on the Bird’s Head Peninsula, a region renowned for its exceptional biodiversity. Situated at approximately -0.8667° latitude and 134.0833° longitude, the city’s geography is dominated by a gently sloping terrain rising from the Dampier Strait. The landscape surrounding Manokwari is a mosaic of lowland rainforest, interspersed with hills and small mountains, creating a varied microclimate. The city itself is largely urban, though it blends seamlessly with the surrounding rural areas, exhibiting a gradual urban–rural gradient. The proximity to the Dampier Strait and other smaller bays significantly influences local weather patterns and, consequently, air quality. The prevailing winds are often maritime, bringing moisture and influencing pollutant dispersion. While Manokwari lacks large-scale industrial belts within its immediate vicinity, it serves as a regional hub for trade and transportation, with some light industry and port activity contributing to localized emissions. Agricultural zones, primarily focused on smallholder farming of crops like cassava and sago palm, are present in the surrounding areas, and while generally low-impact, agricultural burning practices during land clearing can occasionally contribute to elevated particulate matter. The elevation is relatively low, averaging around 30 meters above sea level, which can exacerbate the trapping of pollutants under certain meteorological conditions. The Bird's Head Peninsula's unique geological formations also influence drainage patterns and local air circulation.

Manokwari experiences a tropical climate characterized by distinct wet and dry seasons, rather than the four seasons found in temperate regions. The dry season, typically spanning from May to October, generally sees improved air quality due to increased wind speeds and reduced humidity. These winds effectively disperse pollutants, preventing their accumulation. However, the dry season also brings a heightened risk of land clearing for agriculture, which can lead to short periods of elevated particulate matter from controlled burns. The wet season, from November to April, is marked by frequent rainfall and high humidity. While the rain helps to cleanse the atmosphere, the increased humidity can trap pollutants closer to the ground, particularly during periods of reduced wind. Fog, a relatively common occurrence during the wet season, further exacerbates this effect, creating stagnant air conditions. Temperature inversions, though less frequent than in colder climates, can occasionally occur, trapping pollutants in a layer near the surface. During the peak of the wet season (January-February), outdoor activities should be approached with caution, especially for individuals with respiratory sensitivities. The increased humidity can worsen existing conditions. The transition periods between wet and dry seasons are often characterized by fluctuating air quality, with periods of both improvement and deterioration. Maintaining awareness of local weather patterns and minimizing exposure during periods of stagnant air is advisable for all residents, but particularly crucial for children, the elderly, and those with pre-existing respiratory ailments.