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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the ScopePress weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Portsmouth’s coastal climate today brings a high of 12°C and a low of 9°C, with a 40% chance of rain by late afternoon. That means a mild, damp day along the Solent—typical for the south coast in this season.
What is the forecast for Portsmouth this week?
The live forecast above shows temperatures ranging from 8°C to 13°C over the next five days, with the wettest period expected on Wednesday (60% precipitation). Winds from the southwest at 15–20 mph will keep conditions breezy but not severe. For a longer view, check the 10 day weather forecast UK for Portsmouth.
How does Portsmouth’s coastal location affect the weather?
Portsmouth sits on Portsea Island, so sea breezes moderate temperatures year-round. Winters are milder than inland spots like Birmingham Weather, but summer highs rarely exceed 22°C due to the cooling effect of the English Channel. Fog and low cloud are common in spring, particularly near the harbour.
What is the weather in Portsmouth tomorrow?
Tomorrow’s forecast from the live data above indicates a dry start with cloud building by noon, high near 11°C. A 30% chance of drizzle arrives after 6 PM. Check the UK weather hub for updates.
What is the weather in Portsmouth for 10 days?
The 10-day outlook shows temperatures staying between 7°C and 14°C, with the wettest spell likely on day 7 (Friday). For a full breakdown, see the 10 day weather forecast UK page.
Is Portsmouth prone to flooding?
Yes, Portsmouth’s low-lying coastal areas can flood during high spring tides combined with storm surges. The Environment Agency issues alerts for Southsea seafront and Old Portsmouth. Always check live flood warnings on GOV.UK.