Portsmouth Harbour - Haslar Marina Weather Forecast

    • 11
    • 15

    Cloudy

    • 11
    • 14

    Cloudy

    • 10
    • 14

    Cloudy

    • 8
    • 15

    Cloudy

    • 8
    • 14

    Partly cloudy

    • 9
    • 13

    Cloudy

    • 8
    • 13

    Cloudy

Today 15 Apr London and South East England

Cloudy start, with some early light rain in the south. Some warmer, drier intervals developing before heavy rain and gusty winds move east through the afternoon, clearing to showers later. Maximum temperature 17 °C.

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Portsmouth Harbour - Haslar Marina Temperature Statistics

April Temperature

Thorney Island (14km)

  • Lowest 6 April, 2026

    1.2 °C

  • Average April

    10.3 °C

  • Highest 8 April, 2026

    19.2 °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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