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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Public Journal weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
If you’re heading out in Portsmouth today, the live forecast above shows what to expect straight away — a reliable guide whether you’re walking the seafront, crossing the harbour or checking the school run weather. Coastal conditions here shift quickly, so trust the live data rather than a single figure.
What will the weather in Portsmouth be like tomorrow?
Tomorrow’s outlook for Portsmouth hinges on the same south-coast breeze that often funnels cloud and light rain in from the Solent. The live forecast above gives the clearest picture for your plans — but generally, a mild, damp start may give way to brighter spells by the afternoon. Keep an eye on the 10-day forecast for the south coast for any changes.
Is the weather in Portsmouth different from inland areas?
Yes, Portsmouth’s peninsula position means it runs cooler in summer and milder in winter than places like Fareham or Havant just a few miles north. The sea breeze can drop the temperature by 2–3°C compared to inland, and fog lingers longer along Langstone Harbour. Check the UK weather hub for a broader view.
Why is the Portsmouth weather forecast so changeable?
Portsmouth sits on Portsea Island, exposed to wind and moisture from the Solent and English Channel. Low pressure systems track quickly across the south, so a clear morning can turn showery within an hour. Always check the latest forecast before heading out.
Where can I find reliable Portsmouth weather information?
The Met Office and BBC Weather both cover Portsmouth well, with hourly breakdowns for ‘Portsmouth weather BBC’ and ‘met office weather Portsmouth’. Use the live forecast above as your first source — it’s updated regularly for the city.
How accurate are 14-day and 30-day forecasts for Portsmouth?
Forecasts beyond a week — such as ‘portsmouth weather 14 day forecast’ or ‘portsmouth weather 30 days’ — are general trends, not precise predictions. For up to five days, accuracy is good; beyond that, treat details as guidance. Check the 10-day forecast for the most useful medium-range view.