Portsmouth Weather Forecast

    • 16
    • 23

    Sunny day

    • 18
    • 24

    Cloudy

    • 16
    • 25

    Partly cloudy

    • 15
    • 23

    Partly cloudy

    • 15
    • 24

    Sunny day

    • 17
    • 23

    Cloudy

    • 16
    • 23

    Partly cloudy

Today 20 Jul London and South East England

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

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Portsmouth Temperature Statistics

July Temperature

Thorney Island (11km)

  • Lowest 3 July, 2026

    11.6 °C

  • Average July

    21.2 °C

  • Highest 10 July, 2026

    30.8 °C

Climate (2021–2026)

Thorney Island (11km)

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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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