Home › Weather › Portsmouth Weather
Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the WordPatch weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Check the live forecast above before heading to the coast, as Portsmouth’s weather changes quickly. This south-coast city has milder winters than inland but can be breezy, so packing layers and a windproof jacket is sensible all year.
What is the best time to visit Portsmouth?
Late spring (May to June) and early autumn (September) offer the most reliable weather, with temperatures often between 14°C and 20°C. These months avoid the peak school-holiday crowds while still being pleasant for visiting the Historic Dockyard or Southsea beach. July and August are warmest but can be busy and occasionally humid.
What should I pack for a trip to Portsmouth?
A waterproof coat is essential even in summer, as sea breezes can bring sudden showers. In winter, pack a warm jumper and sturdy shoes for exploring Old Portsmouth. The 10-day forecast will help you decide if you need sun cream or an extra layer.
How reliable are long-range forecasts for Portsmouth?
The 14-day forecast gives a useful trend, but accuracy drops beyond a week. For current conditions, the Met Office weather Portsmouth page is the most reliable; the BBC Weather Portsmouth service also offers hourly breakdowns. For a longer view, a Portsmouth weather 30 day outlook shows general patterns rather than exact temperatures.
Is Portsmouth warmer than inland areas?
Yes, Portsmouth’s coastal position keeps winter temperatures 1–2°C milder than places like Salisbury. In summer, however, it can feel cooler due to sea breezes, so don’t expect the heat you might find inland.
Does it rain a lot in Portsmouth?
Portsmouth gets around 650mm of rain a year—less than the UK average. Rain is spread fairly evenly, though autumn and winter are wetter. Check the weather in Portsmouth tomorrow and the Portsmouth weather 15 day outlook for specific planning.
When are school holidays busiest in Portsmouth?
Easter and the summer half-term (late May) see the biggest crowds, especially at the Spinnaker Tower. July and August are peak season. If you can, visit in September when the weather is still good but queues are shorter.
For other UK destinations, see our UK weather hub or compare conditions with Bristol Weather.