Portsmouth Weather Forecast

    • 17
    • 23

    Partly cloudy

    • 15
    • 21

    Cloudy

    • 16
    • 19

    Light rain shower

    • 16
    • 20

    Light rain shower

    • 16
    • 19

    Light rain shower

    • 15
    • 19

    Light rain shower

    • 14
    • 18

    Light rain shower

Today 26 Aug London and South East England

Early sunny spells, before a weakening band of rain moves east through the morning. This likely clearing Kent through the early afternoon. Sunny spells follow, perhaps the odd shower in the west. Feeling very warm, with light winds. Maximum Temperature 27C.

Tonight 26 Aug London and South East England

A dry evening with spells of late sunshine. Some variable amounts of cloud overnight, perhaps leading to the odd shower but for most, it will stay dry with light winds. Cooler than recent nights. Minimum Temperature 12C.

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Portsmouth Temperature Statistics

August Temperature

Thorney Island (11km)

  • Lowest 6 August, 2025

    9.9 °C

  • Average August

    18.3 °C

  • Highest 12 August, 2025

    28.1 °C

Climate (2020–Present)

Thorney Island (11km)

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  • Average Low 2020–2025

    8.6 °C

  • Average 2020–2025

    11.9 °C

  • Average High 2020–2025

    15.1 °C
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