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Live forecasts update automatically; written guidance last reviewed 20 June 2026 by the Southampton Wire weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Portsmouth’s weather today, as shown in the live forecast above, brings a mix of coastal cloud and bright spells typical for this time of year on the South Coast. The Solent breeze keeps conditions fresher than inland, with temperatures hovering near seasonal averages for late spring.
What is the outlook for Portsmouth this week?
The coming days will see a familiar pattern for the city: low cloud rolling in from the Channel during the morning, often breaking to sunny intervals by the afternoon. Winds remain moderate from the southwest, meaning the exposed seafront at Southsea and Old Portsmouth will feel noticeably cooler than sheltered streets inland. Rain is unlikely until midweek, when a weak front may brush the coast.
How does the coastal location affect the forecast?
Portsmouth’s position on Portsea Island means the weather is heavily influenced by the English Channel. Sea breezes can drop temperatures by 2–3°C compared to nearby cities like Southampton, and fog or low cloud often lingers longer over the harbour. This makes checking the UK weather hub or the 10 day weather forecast UK essential for planning trips to the beach or the Historic Dockyard.
What is the weather in Portsmouth tomorrow?
Tomorrow will see a dry start with hazy sunshine, but cloud thickens from the west by late afternoon. Highs near 14°C, with a light breeze off the Solent. The Portsmouth weather page updates hourly for precise timing.
Is there a 14-day forecast for Portsmouth?
Yes, the weather portsmouth 14 day forecast shows a settled pattern for the next fortnight, with temperatures gradually rising to 17°C by the weekend. Longer-range outlooks are available from the met office weather portsmouth feed.
How accurate are 30-day forecasts for Portsmouth?
Portsmouth weather 30 days outlooks give a broad trend rather than daily detail. For reliable planning, stick to the 5-day forecast from the BBC or Met Office, as coastal conditions can shift quickly with changes in the jet stream.