Portsmouth Harbour - Haslar Marina Weather Forecast

    • 18
    • 22

    Partly cloudy

    • 18
    • 20

    Heavy rain

    • 17
    • 20

    Light rain

    • 16
    • 21

    Light rain shower

    • 16
    • 19

    Partly cloudy

    • 17
    • 19

    Partly cloudy

    • 17
    • 20

    Partly cloudy

Today 28 Aug London and South East England

Any overnight rain easing. leaving a largely dry morning with sunny spells. Into the afternoon scattered showers are expected to develop, heavy at times, but with some parts staying dry. Maximum temperature 23 °C.

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Portsmouth Harbour - Haslar Marina Temperature Statistics

August Temperature

Thorney Island (14km)

  • Lowest 8 August, 2026

    10.6 °C

  • Average August

    20.4 °C

  • Highest 13 August, 2026

    32 °C

Climate (2021–2026)

Thorney Island (14km)

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  • Average Low 2021–2026

    9 °C

  • Average 2021–2026

    12.4 °C

  • Average High 2021–2026

    15.6 °C
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