The Met Office has issued a warning for high air pollution levels in Southampton, Hampshire, with the worst conditions expected on 5 March and 8 March 2026. Experts say a slow-moving high-pressure system over Europe is trapping fumes from cars and port activity close to the ground, preventing them from clearing away.
Health advice from DEFRA suggests that adults and children with lung problems, and adults with heart conditions, should reduce strenuous physical activity outdoors during these times. Anyone who notices a cough, sore throat, or sore eyes is also encouraged to stay indoors or reduce their exertion until the air quality improves.
The pollution is largely driven by emissions from diesel cars, lorries, and operations at the Port of Southampton. Southampton City Council currently monitors 10 designated zones in the city that have historically struggled with nitrogen dioxide levels.
While the council previously set a target to cut nitrogen dioxide levels by 34 per cent by 2025, weather conditions continue to impact local air quality. Residents are encouraged to monitor local updates and adjust their plans for outdoor sports or exercise through to the end of the week.
