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The Gold Coast occupies a narrow coastal strip in southeastern Queensland, Australia, stretching approximately 70 kilometres from Beenleigh in the north to Coolangatta at the New South Wales border. This linear city is wedged between the Pacific Ocean to the east and the McPherson Range and hinterland rainforests to the west, creating a distinct urban–rural gradient. The terrain is predominantly flat coastal plains with some low-lying hills, averaging just 5-10 metres above sea level, though the hinterland rises sharply to over 1,000 metres. This geography profoundly influences air quality through several mechanisms. The city's position along the M1 Pacific Motorway corridor concentrates vehicle emissions along this north-south axis, while the coastal location exposes it to sea breezes that typically disperse pollution inland. However, the proximity to the ocean also means salt spray can interact with industrial emissions. The western hinterland acts as a partial barrier, sometimes trapping pollutants when winds are light, particularly during winter temperature inversions. Agricultural zones in the Scenic Rim to the west contribute occasional biomass burning smoke, while the urban sprawl generates consistent construction and road dust. The city's extensive canal systems and wetlands create microclimates that can influence local pollution dispersion patterns.

The Gold Coast experiences distinct seasonal air quality patterns driven by its humid subtropical climate. During summer (December-February), pollution peaks due to multiple converging factors: increased tourist traffic elevates vehicle emissions, higher temperatures accelerate photochemical smog formation, and prevailing northeasterly winds occasionally transport bushfire smoke from South Australia's wine country and bushland. These months also bring heatwaves that stagnate air masses, particularly in the western suburbs. Autumn (March-May) sees gradual improvement as temperatures moderate and rainfall increases, though occasional prescribed burns in the hinterland can cause short-term spikes. Winter (June-August) presents a paradox—generally cleaner air due to reduced tourism and fewer bushfires, but cold nights often create temperature inversions that trap vehicle emissions near the ground, especially in valley areas like Nerang. Morning fog during this period can combine with pollution to reduce visibility. Spring (September-November) typically offers the best air quality with consistent southeasterly sea breezes, though late spring brings increased pollen counts that affect respiratory health. Sensitive groups should limit outdoor exertion on still summer days and during winter inversion episodes, while generally favouring spring mornings for outdoor activities.