Portsmouth Harbour - M275 Motorway Bridge Weather Forecast

    • 10
    • 12

    Cloudy

    • 9
    • 12

    Partly cloudy

    • 8
    • 14

    Sunny day

    • 7
    • 14

    Sunny day

    • 6
    • 13

    Sunny day

    • 6
    • 12

    Partly cloudy

    • 6
    • 11

    Partly cloudy

Today 16 Mar London and South East England

A dry and bright start to the day with some good sunny spells. Cloud then thickening from midday with a few light outbreaks of rain possible across the north of the region into the afternoon. Breezy at times. Maximum temperature 12 °C.

Tonight 16 Mar London and South East England

A dry and mild night, remaining mostly cloudy but a few breaks are possible at times allowing for a few clearer spells. Breezy at times. Minimum temperature 7 °C.

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Portsmouth Harbour - M275 Motorway Bridge Temperature Statistics

March Temperature

Thorney Island (11km)

  • Lowest 15 March, 2026

    0.1 °C

  • Average March

    8.5 °C

  • Highest 3 March, 2026

    15.6 °C

Climate (2021–Present)

Thorney Island (11km)

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  • Average Low 2021–2026

    8.7 °C

  • Average 2021–2026

    12 °C

  • Average High 2021–2026

    15.2 °C
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