Portsmouth Harbour - Haslar Marina Weather Forecast

    • 19
    • 23

    Partly cloudy

    • 15
    • 22

    Partly cloudy

    • 14
    • 21

    Cloudy

    • 15
    • 20

    Partly cloudy

    • 17
    • 21

    Partly cloudy

    • 16
    • 22

    Partly cloudy

Today 4 Aug London and South East England

Generally fine at first with some very warm spells of sunshine developing. However, as cloud increases heading into the afternoon one or two showers are possible. Feeling hot and humid. Maximum temperature 30 °C.

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Portsmouth Harbour - Haslar Marina Temperature Statistics

August Temperature

Thorney Island (14km)

  • Lowest 1 August, 2026

    13.3 °C

  • Average August

    19.5 °C

  • Highest 2 August, 2026

    27.6 °C

Climate (2021–2026)

Thorney Island (14km)

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  • Average Low 2021–2026

    9 °C

  • Average 2021–2026

    12.3 °C

  • Average High 2021–2026

    15.5 °C
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