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Live forecasts update automatically; written guidance last reviewed 20 June 2026 by the Culture Observer weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Portsmouth enjoys one of the mildest and sunniest climates on the UK south coast, with less rainfall than the national average. The live forecast above shows conditions for the coming days, so you can plan accordingly.
When is the best time to visit Portsmouth?
May through September offers the most reliable weather for a Portsmouth trip, with July and August averaging 20–22°C and long daylight hours. Spring and autumn are cooler but still pleasant for walking the seafront or exploring the Historic Dockyard. Winter is mild but windy, and Christmas at the Spinnaker Tower has its own appeal if you pack a warm coat and a waterproof layer.
What should you pack for Portsmouth weather?
A layered approach works year-round. A light jacket or fleece is useful even in summer when sea breezes pick up. Waterproofs are sensible from October to March. Comfortable walking shoes are essential whatever the season, especially if you plan to cover the mile between the station and Gunwharf Quays.
Is Portsmouth usually windy?
Yes, being a coastal city on a peninsula, a southwesterly breeze is common. Wind speeds average 12–15mph, with stronger gusts during autumn and winter storms. The Spinnaker Tower can sway noticeably on blustery days.
Does Portsmouth get snow?
Snow is rare in Portsmouth. The city averages fewer than five days of lying snow per winter, and accumulations above a couple of centimetres are unusual. If you need to check the 10-day forecast for any wintry surprises, it is worth a look before you travel.
How accurate are 14-day and 30-day Portsmouth forecasts?
Extended outlooks such as the UK weather hub or any portsmouth weather 30 days projection are useful for spotting broad trends but become less reliable beyond day seven. For specific plans, check the met office weather portsmouth update or portsmouth weather bbc page closer to the day.