Portsmouth Harbour - Royal Clarence Marina Weather Forecast

    • 5
    • 11

    Light rain

    • 4
    • 10

    Partly cloudy

    • 8
    • 10

    Cloudy

    • 8
    • 11

    Cloudy

    • 9
    • 14

    Cloudy

    • 8
    • 12

    Overcast

    • 7
    • 11

    Cloudy

Today 27 Mar London and South East England

Cloudy with outbreaks of rain or drizzle, mostly light, but with some heavier bursts possible. These most likely in the east as the rain clears to the south and east later in the day. Milder than on Thursday. Maximum temperature 12 °C.

Tonight 27 Mar London and South East England

Rain soon easing away during the evening, with cloud breaking to clearer skies overnight. Mainly dry after midnight with winds also easing. Cold with a patchy rural frost possible. Minimum temperature 2 °C.

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Portsmouth Harbour - Royal Clarence Marina Temperature Statistics

March Temperature

Thorney Island (14km)

  • Lowest 15 March, 2026

    0.1 °C

  • Average March

    8.8 °C

  • Highest 19 March, 2026

    16.9 °C

Climate (2021–Present)

Thorney Island (14km)

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  • Average Low 2021–2026

    8.8 °C

  • Average 2021–2026

    12.1 °C

  • Average High 2021–2026

    15.2 °C
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