Portsmouth Harbour - M275 Motorway Bridge Weather Forecast

    • 11
    • 11

    Cloudy

    • 7
    • 12

    Cloudy

    • 10
    • 12

    Partly cloudy

    • 11
    • 12

    Cloudy

    • 10
    • 12

    Cloudy

    • 7
    • 11

    Cloudy

Today 11 Dec London and South East England

Dry start with bright spells after any early fog patches clear. Turning cloudier into the afternoon, perhaps with a little patchy drizzle in places. Increasingly breezy but mild. Maximum Temperature 11C.

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Portsmouth Harbour - M275 Motorway Bridge Temperature Statistics

December Temperature

Thorney Island (11km)

  • Lowest 5 December, 2025

    -1.1 °C
  • Average December

    9.5 °C
  • Highest 7 December, 2025

    13.9 °C

Climate (2020–Present)

Thorney Island (11km)

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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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