Portsmouth Harbour - Portchester Castle Weather Forecast

    • 5
    • 13

    Thunder

    • 7
    • 8

    Cloudy

    • 10
    • 14

    Heavy rain shower

    • 7
    • 12

    Light rain shower

    • 4
    • 10

    Light rain shower

    • 4
    • 9

    Sunny day

    • 10
    • 12

    Cloudy

Today 15 Nov London and South East England

A mostly dry but frosty start in places. Cloud will thicken through the morning, bringing outbreaks of showery rain by day. Less cold than of late, with a gentle breeze. Maximum temperature 12 °C.

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Portsmouth Harbour - Portchester Castle Temperature Statistics

November Temperature

Thorney Island (13 km)

  • Lowest 14 November, 2026

    -1.7 °C

  • Average November

    7.2 °C

  • Highest 6 November, 2026

    13.1 °C

Climate (2021–2026)

Thorney Island (13 km)

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  • Average Low 2021–2026

    9 °C

  • Average 2021–2026

    12.4 °C

  • Average High 2021–2026

    15.6 °C
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