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Live forecasts update automatically; written guidance last reviewed 20 June 2026 by the Current UK weather desk. Data from national met services via Open-Meteo.
Check the live forecast above before heading out, then pack a light jacket and a raincoat regardless of the season. Portsmouth’s coastal position means conditions change quickly, with sea breezes and cloud often rolling in from the Solent even when inland areas are clear.
What should I expect from Portsmouth weather this week?
The live forecast above gives the most up‑to‑date picture. In general, Portsmouth sees milder winters and cooler summers than inland cities, thanks to the sea. Wind is a near‑constant feature, especially during spring and autumn, and rain can arrive at any time. If you are checking the met office weather portsmouth or a portsmouth weather bbc report, note that the exposed harbour and coastal paths can feel several degrees colder than the stated air temperature. For planning ahead, the weather in portsmouth 10 days forecast is reliable for spotting unsettled spells, while longer‑range weather portsmouth 14 day forecast and portsmouth weather 15 days outlooks give a general trend rather than exact detail.
When is the best time to visit Portsmouth?
Late spring (May to early June) and early autumn (September) offer the best balance of mild temperatures, lower rainfall and fewer crowds. July and August are the warmest months but also bring school holidays and higher accommodation costs. If you are looking at portsmouth weather 30 days in advance, aim for a window with stable high pressure. Packing a windproof layer is essential even in summer, and an umbrella is useful for the frequent but brief showers.
Is Portsmouth very windy?
Yes, exposed coastal areas and the harbour experience moderate to strong winds throughout the year, especially in spring and autumn. Gusts can make it feel noticeably colder, so a windproof jacket is a wise choice.
Does it rain a lot in Portsmouth?
Portsmouth receives around 650–700mm of rain annually, which is less than the UK average. Rain tends to be frequent but often light, with the wettest months from October to January.
Where can I find the most reliable forecast for today?
The live forecast at the top of this page is updated regularly. For additional detail, the Met Office and BBC Weather provide specific hourly data and warnings for the city.
Explore more UK destinations on our UK weather hub, and check the 10 day weather forecast UK for your next trip.