Portsmouth Harbour - Haslar Marina Weather Forecast

    • 18
    • 26

    Partly cloudy

    • 19
    • 23

    Sunny day

    • 21
    • 24

    Sunny day

    • 20
    • 27

    Sunny day

    • 18
    • 27

    Sunny day

    • 17
    • 24

    Partly cloudy

    • 17
    • 23

    Cloudy

Today 10 Aug London and South East England

A bright start but patchy cloud pushing southward through the morning. Remaining dry throughout though with sunshine returning later. Feeling a little cooler but still warm. Maximum temperature 27 °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

    19.3 °C

  • Highest 3 August, 2026

    30.3 °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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