Portsmouth Harbour - Haslar Marina Weather Forecast

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    Sunny day

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    • 24

    Sunny day

    • 17
    • 25

    Partly cloudy

    • 17
    • 22

    Sunny day

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    Sunny day

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    Sunny day

Today 20 Jul London and South East England

A dry and sunny start, becoming cloudy during the morning, overnight skies clear except along the coast where the cloud lingers. Winds becoming light and variable. Maximum temperature 24 °C.

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Portsmouth Harbour - Haslar Marina Temperature Statistics

July Temperature

Thorney Island (14km)

  • Lowest 3 July, 2026

    11.6 °C

  • Average July

    21.2 °C

  • Highest 10 July, 2026

    30.8 °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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