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Bhāvnagar occupies a distinctive coastal position in Gujarat's Saurashtra peninsula, situated on the Gulf of Khambhat with its urban core approximately 10 kilometres inland from the Arabian Sea. This strategic location places the city at an average elevation of just 24 metres above sea level, creating a flat terrain that extends into the surrounding Kathiawar region's semi-arid plains. The city's geography profoundly influences its air quality through multiple mechanisms. Proximity to the Gulf of Khambhat provides some maritime moderation but also exposes the city to sea salt aerosols and occasional industrial emissions from coastal activities. Bhāvnagar sits within Gujarat's industrial corridor, with nearby manufacturing zones and the presence of the Alang Ship Breaking Yard approximately 50 kilometres southeast contributing to regional pollution loads. The urban-rural gradient shows dense settlement patterns in the city centre transitioning to agricultural belts growing cotton, groundnuts, and wheat in the hinterlands, where seasonal crop residue burning can affect air quality. The surrounding landscape features low-lying plains with sparse vegetation, offering little natural filtration for airborne pollutants. Wind patterns from the Arabian Sea typically disperse pollutants northeastward, but the city's bowl-like topography can occasionally trap emissions during stagnant conditions. As an important port and industrial centre, Bhāvnagar's air quality reflects both local urban emissions and regional transport from industrial and agricultural activities across Saurashtra.

Bhāvnagar's air quality follows distinct seasonal patterns shaped by its coastal location and monsoon climate. During winter (December-February), cooler temperatures and frequent temperature inversions trap pollutants near the surface, creating the year's worst air quality episodes. Morning fog combines with emissions from heating sources and industrial activities, making these months particularly challenging for respiratory patients who should limit outdoor exertion. Spring (March-May) brings rising temperatures and increasing wind speeds that generally improve dispersion, though occasional dust storms from the Thar Desert region can temporarily spike particulate levels. The pre-monsoon heat creates convective mixing that helps ventilate the city. Summer monsoon (June-September) dramatically cleanses the atmosphere as southwest winds from the Arabian Sea bring heavy rainfall that washes pollutants from the air. This period offers the cleanest air for outdoor activities, though high humidity can exacerbate respiratory discomfort for some individuals. Post-monsoon (October-November) sees gradually deteriorating conditions as winds weaken, temperatures drop, and agricultural burning in surrounding regions contributes to haze formation. Sensitive groups should begin taking precautions during this transitional period. The optimal months for outdoor activity are typically July through September when monsoon rains provide natural air purification, while December through February require the most vigilance for those with respiratory or cardiovascular conditions.