Portsmouth Harbour Entrance Weather Forecast

    • 1
    • 8

    Partly cloudy

    • 8
    • 8

    Partly cloudy

    • 11
    • 13

    Overcast

    • 8
    • 12

    Cloudy

    • 6
    • 10

    Light rain shower

    • 9
    • 10

    Partly cloudy

Today 25 Nov London and South East England

Bright spells and variable amounts of cloud, but widely dry through the day with just the chance of a light shower in the north and east. Still feeling rather chilly, though winds a little lighter than on Monday. Maximum Temperature 7C.

Tonight 25 Nov London and South East England

Remaining dry and becoming increasingly clear overnight with temperatures falling quickly into the evening as winds ease, with a widespread frost developing. Minimum Temperature -1C.

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Portsmouth Harbour Entrance Temperature Statistics

November Temperature

Thorney Island (13km)

  • Lowest 21 November, 2025

    -2.3 °C

  • Average November

    10.4 °C

  • Highest 13 November, 2025

    16.3 °C

Climate (2020–Present)

Thorney Island (13km)

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  • Average Low 2020–2025

    8.6 °C

  • Average 2020–2025

    11.9 °C

  • Average High 2020–2025

    15.1 °C
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