Portsmouth Harbour - M275 Motorway Bridge Weather Forecast

    • 15
    • 23

    Sunny day

    • 17
    • 24

    Sunny day

    • 17
    • 25

    Sunny day

    • 17
    • 25

    Sunny day

    • 17
    • 25

    Sunny day

    • 18
    • 25

    Sunny day

Today 8 Jul London and South East England

A cool start, but fine for most with warm sunny spells developing. Eastern parts may be a little cloudier and breezier, perhaps with the odd fleeting light shower at first. Maximum Temperature 25C.

Tonight 8 Jul London and South East England

Mostly clear overnight with light winds, perhaps the odd patch of low cloud near the coast and some high cloud moving into the west by dawn. Minimum Temperature 8C.

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Portsmouth Harbour - M275 Motorway Bridge Temperature Statistics

July Temperature

Thorney Island (11km)

  • Lowest 3 July, 2025

    10.3 °C

  • Average July

    18.8 °C

  • Highest 1 July, 2025

    27.4 °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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