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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the UrbanMixr weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Portsmouth’s south-coast position gives it a milder, often breezier climate than inland cities. As the live forecast above shows, conditions can shift quickly here, so checking ahead before a harbour walk or ferry trip is wise.
What is the best time to visit Portsmouth for decent weather?
June to early September offers the warmest sea air and longest daylight hours, with average highs around 20–22°C. July and August are peak holiday weeks, so expect busier seafronts and higher accommodation prices. May and September are good-value shoulder months, still pleasant for exploring the Historic Dockyard or Southsea seafront, with fewer crowds.
What should I pack for a trip to Portsmouth?
A waterproof jacket is essential year-round – even in summer a sea breeze can bring sudden drizzle. Layers work well in spring and autumn, when temperatures can swing between 10°C and 18°C. In winter, a warm coat, scarf and comfortable walking shoes are needed. Don’t forget sun protection on bright days; the coastal UV can catch you out.
Does Portsmouth get much snow in winter?
Snow is infrequent – usually two or three days a year. Coastal moderation keeps temperatures above freezing more often than inland, though frost can form on clear nights. Check the UK weather hub for any cold snaps.
How accurate are 14-day forecasts for Portsmouth?
Long-range forecasts like the weather portsmouth 14 day forecast give a trend rather than precise day-by-day detail. For reliable planning, check 10 day weather forecast UK pages closer to your visit. The met office weather portsmouth updates are your best bet for accuracy.
Is it usually windy in Portsmouth?
Yes – the Solent funnels south-westerly winds, making it one of the windier UK cities. Average wind speed is around 15–20 km/h, with stronger gusts in winter. If you’re heading to the Spinnaker Tower or taking a harbour cruise, a windproof layer is worth packing.