Portsmouth Weather
Home › Weather › Portsmouth Weather
Live forecasts update automatically; written guidance last reviewed 20 June 2026 by the British News Desk weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Portsmouth’s weather today is shaped by its south-coast position, bringing mild, changeable conditions with a brisk sea breeze. Check the live forecast above for the exact temperature, but expect a mix of cloud and sunny spells typical of a coastal spring day.
What is the weather like in Portsmouth today and tomorrow?
Portsmouth’s maritime climate means it stays cooler in summer and milder in winter than inland areas. Today’s conditions, as shown in the live forecast above, reflect that balance. For weather in Portsmouth tomorrow, sea breezes often strengthen in the afternoon, so a light jacket is practical even on a mild day.
How reliable are long-range Portsmouth forecasts?
For weather Portsmouth 14 day forecast or a portsmouth weather 30 day outlook, confidence drops significantly after day seven. The Met Office’s 10-day model is the most reliable extended guide, and for weather portsmouth 15 days, treat it as a trend rather than a precise prediction. The live forecast above gives the most up-to-date short-term view.
Is Portsmouth windier than other UK cities?
Yes, because of its exposed coastal position on Portsea Island. Average wind speeds here are about 10–15% higher than inland cities like London, especially from late autumn through early spring.
Does Portsmouth get much rain compared to the UK average?
Portsmouth is drier than the UK average, with about 600–650 mm of rain annually. It is in a rain shadow thanks to the Isle of Wight, so it often avoids the heaviest downpours hitting inland southern counties.
Can I trust a 30-day forecast for Portsmouth?
No, not as a daily prediction. Extended outlooks show general pressure patterns but specific weather in Portsmouth tomorrow is only reliable within three to five days. Always check the live forecast for the current day.
Sources
For more detail on how Portsmouth compares, visit our UK weather hub or check the 10 Day Weather Forecast UK for a broader outlook. Other south-coast conditions are covered on our Bristol Weather page. For the latest met office weather portsmouth data, always refer to the live forecast above.
