Portsmouth weather
Loading live data…Latest for Portsmouth: Met Office (UKMO model): 24° Clear · European (ECMWF): 22° Partly cloudy · American (NOAA GFS): 24° Overcast.
The weather map: all three models at once
Met Office, European, American side by side around Portsmouth and nearby towns.Live rain radar →Next 14 hours
consensus of the three models7-day forecast
where the models agree, and where they splitPortsmouth, ENG is at its warmest in Jun (average highs near 21°C) and coldest in Jan (lows around 3°C), with roughly 1057 mm of precipitation across the year. Below, compare what Met Office, European, American forecast for Portsmouth right now, and see exactly where they disagree.
Portsmouth climate by month
average daytime high and overnight low across a typical yearWhich forecast is most accurate in Portsmouth?
CheckWeather Score — graded against the weather that actually happened
The CheckWeather Score blends temperature, wind and rain accuracy — each measured against ERA5 (the recorded weather) over the last 30 days across 40 cities. Lower error means a higher score. The apps you know (AccuWeather, Apple Weather, The Weather Channel) are built on these models.
Common questions
What's the weather in Portsmouth today?
Will it rain in Portsmouth today or tomorrow?
Which forecast is most accurate for Portsmouth?
What is the warmest month in Portsmouth?
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How much rain does Portsmouth get?
The forecasts Britons check
The Met Office runs Britain's own open model, so its data sits right in the comparison above. BBC Weather and AccuWeather keep theirs closed, so we link you to them. Good news: BBC is moving back to the Met Office model, so it'll join the comparison too.