Portsmouth Harbour - Portsmouth Weather Forecast

    • 16
    • 25

    Cloudy

    • 16
    • 25

    Cloudy

    • 18
    • 26

    Sunny day

    • 17
    • 24

    Sunny day

    • 19
    • 25

    Sunny day

    • 20
    • 25

    Sunny day

Today 5 Jul London and South East England

Dry with some hazy sunshine throughout the day. Above average temperatures, and becoming very warm or hot in places. Maximum temperature 30 °C.

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Portsmouth Harbour - Portsmouth Temperature Statistics

July Temperature

Thorney Island (13km)

  • Lowest 3 July, 2026

    11.6 °C

  • Average July

    19.1 °C

  • Highest 2 July, 2026

    27.4 °C

Climate (2021–2026)

Thorney Island (13km)

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  • Average Low 2021–2026

    8.9 °C

  • Average 2021–2026

    12.2 °C

  • Average High 2021–2026

    15.4 °C
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