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Cleethorpes, a coastal town in North East Lincolnshire, occupies a unique geographic position on the eastern edge of the Lincolnshire coast, directly facing the North Sea. Its location, at approximately 53.55°N, -0.02°W, places it within a relatively flat, low-lying terrain, characteristic of the East Anglian coastal plain. The town’s urban fabric is defined by its proximity to the Humber Estuary, a significant waterway and historical industrial hub. The surrounding landscape is predominantly agricultural, with expansive arable fields stretching inland, contributing to a gradual urban-rural gradient. Elevation is minimal, rarely exceeding 10 meters above sea level, which can influence local wind patterns and pollutant dispersion. While Cleethorpes itself is a relatively small urban centre, its regional significance is tied to its role as a port and its connection to the wider industrial belt around the Humber. This proximity means that industrial emissions from larger centres like Immingham and Grimsby can occasionally impact Cleethorpes’ air quality. The constant presence of the North Sea exerts a strong influence, with sea breezes playing a crucial role in ventilating the town and dispersing pollutants. However, calm conditions can lead to localised stagnation, particularly during periods of temperature inversion. The coastal location also introduces the potential for salt spray and marine aerosols, which can interact with other pollutants and affect respiratory health. The town’s geography, therefore, presents a complex interplay of natural ventilation and potential for localised pollution accumulation.

Cleethorpes experiences a temperate maritime climate, significantly impacting its air quality throughout the year. Winter months (December-February) often bring the greatest challenges. Cold, still air frequently leads to temperature inversions, trapping pollutants close to the ground. Fog, common during this period, further exacerbates the issue by reducing visibility and hindering dispersion. Agricultural activities, such as the spreading of manure, can also contribute to ammonia emissions during the colder months. Spring (March-May) typically sees an improvement as stronger winds and rising temperatures begin to break up these stagnant conditions. However, pollen levels increase, impacting those with allergies and potentially aggravating respiratory conditions. Summer (June-August) generally offers the best air quality, with consistent sea breezes providing excellent ventilation. The influx of tourists also increases traffic, but the prevailing winds usually mitigate any significant impact. Autumn (September-November) presents a transitional period. While winds remain relatively strong, the return of cooler temperatures can occasionally trigger localised inversions, particularly in the early morning. Agricultural practices resume, again contributing to ammonia emissions. Sensitive groups, including children, the elderly, and individuals with pre-existing respiratory illnesses, should be particularly mindful during winter and autumn mornings. During periods of fog or calm conditions, limiting strenuous outdoor activity is advisable. The sea breeze, a defining feature of Cleethorpes’ climate, generally provides a natural cleansing effect, but awareness of seasonal variations is key to protecting respiratory health.