Portsmouth Harbour - Portchester Lake Weather Forecast

    • 7
    • 10

    Partly cloudy

    • 9
    • 10

    Light rain

    • 8
    • 10

    Heavy rain shower

    • 8
    • 10

    Light rain shower

    • 7
    • 10

    Cloudy

    • 7
    • 9

    Cloudy

    • 8
    • 10

    Overcast

Today 4 Feb London and South East England

Mainly dry, with any remaining rain and low cloud gradually dispersing to leave a mainly fine afternoon with some sunny intervals. Feeling cooler in exposure to the easterly wind. Maximum temperature 11 °C.

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Portsmouth Harbour - Portchester Lake Temperature Statistics

February Temperature

Thorney Island (13km)

  • Lowest 3 February, 2026

    5.9 °C

  • Average February

    7.4 °C

  • Highest 1 February, 2026

    9.7 °C

Climate (2021–Present)

Thorney Island (13km)

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  • Average Low 2021–2026

    8.7 °C

  • Average 2021–2026

    12 °C

  • Average High 2021–2026

    15.1 °C
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