Portsmouth Harbour - Inner Weather Forecast

    • 6
    • 11

    Cloudy

    • 9
    • 11

    Overcast

    • 9
    • 11

    Partly cloudy

    • 8
    • 13

    Sunny day

    • 7
    • 14

    Sunny day

    • 6
    • 12

    Cloudy

Today 15 Mar London and South East England

Fine Saturday, with brighter or sunny spells, light winds, and isolated showers. Fine, dry Sunday, before rain spreads east later. Chilly overnight, perhaps isolated showers. Breezy, but mostly dry Monday.

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Portsmouth Harbour - Inner Temperature Statistics

March Temperature

Thorney Island (13km)

  • Lowest 14 March, 2026

    1.7 °C

  • Average March

    8.8 °C

  • Highest 3 March, 2026

    15.6 °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

    15.2 °C
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