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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the StoryShift weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Portsmouth has a mild maritime climate with cool winters and warm summers. Rainfall is spread fairly evenly through the year, and sea breezes often moderate temperatures along the south coast. The live forecast above shows the current conditions for the city.
When is the best time to visit Portsmouth?
Late spring to early autumn (May–September) offers the most reliable weather for a trip. July and August are the warmest months, with average highs around 20–22°C, though sea breezes keep things comfortable. If you check the 10 day weather forecast UK ahead of travel, you can plan around any unsettled spells. School holidays in late July and August mean busier seafronts and higher accommodation prices, so May, June or September often give better value.
What should you pack for a Portsmouth trip?
A waterproof jacket is useful in any season, as showers can arrive from the Channel without much warning. Layers work well even in summer, because the breeze off the Solent can feel cool. Comfortable walking shoes are essential for exploring the Historic Dockyard and the seafront promenades.
What is the best month for a dry visit?
June tends to be the driest month in Portsmouth, with lower rainfall totals and more sunshine hours than later in summer. It also avoids the school holiday crowds.
Is Portsmouth very windy?
Portsmouth is exposed to south-westerly winds off the English Channel, so it can feel breezier than inland towns. Wind speeds average 12–15 mph year-round, with stronger gusts in winter storms.
How reliable are long-range forecasts for Portsmouth?
The weather portsmouth 14 day forecast gives a useful trend, but accuracy drops beyond 7–10 days. For travel planning, check the met office weather portsmouth page or portsmouth weather bbc updates a few days ahead.