Portsmouth Harbour - Portsmouth Weather Forecast

    • 8
    • 13

    Sunny day

    • 5
    • 12

    Light rain shower

    • 9
    • 11

    Cloudy

    • 8
    • 14

    Cloudy

    • 8
    • 12

    Cloudy

    • 9
    • 13

    Sunny day

Today 27 Mar London and South East England

Early mist, fog and low cloud slowly clearing from rural areas to leave another fine and dry day, with plenty of warm sunshine and mainly light winds. Maximum Temperature 18C.

Tonight 27 Mar London and South East England

After a clear start to the night cloud will thicken from the west after midnight with patchy, mainly light, rain in the west before dawn. Turning breezy. Minimum Temperature 1C.

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Portsmouth Harbour - Portsmouth Temperature Statistics

March Temperature

Thorney Island (13km)

  • Lowest 4 March, 2025

    -2.1 °C

  • Average March

    7.6 °C

  • Highest 20 March, 2025

    16.6 °C

Climate (2020–Present)

Thorney Island (13km)

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  • Average Low 2020–2025

    8.5 °C

  • Average 2020–2025

    11.8 °C

  • Average High 2020–2025

    15 °C
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