Portsmouth Weather, When to Go and Climate Information

(Portsmouth, Hampshire, England, UK)

HMS Victory PhotographBeing located on the southern coast of England, the city of Portsmouth has an especially mild climate, enjoying some of the sunniest weather that the country has to offer.

Due to its coastal setting, Portsmouth manages to avoid the worst of the northerly winds, being protected by the Portsdown Hill, and this is certainly reflected in its higher-than-average monthly temperatures. From late spring until the early part of autumn, Portsmouth boasts an enviable climate, with warm weather and crowds of tourists.

Further picture of the HMS Victory

Seasonal Climate Variations / When to Go

However, don't be lulled into a false sense of security in Portsmouth, since it still has plenty of rainy weather throughout the year. Summer may well feature the hottest climate, but wet and overcast days in June, July and August must be expected from time to time.

Rarely is the summer rain excessive in Portsmouth, with even the heaviest shower soon disappearing, although occasional extremes can see week-long damp weather every few years. Summer temperatures average around 25°C / 77°F, peaking at more than 30°C / 86°F on the sunniest days, with the biggest buildings retaining the urban heat and making the evenings feel exceedingly warm and pleasant. Winters tend to be a little wetter in Portsmouth, although remain very mild, with temperatures rarely falling below freezing.

Portsmouth Weather and Climate Chart (Averages)



7°C / 45°F
3°C / 37°F


9°C / 48°F
3°C / 37°F


15°C / 59°F
4°C / 39°F


18°C / 64°F
7°C / 45°F


20°C / 68°F
10°C / 50°F


24°C / 75°F
13°C / 55°F


25°C / 77°F
14°C / 57°F


27°C / 81°F
15°C / 59°F


23°C / 73°F
12°C / 54°F


15°C / 59°F
8°C / 46°F


13°C / 55°F
7°C / 45°F


10°C / 50°F
4°C / 39°F