Portsmouth Harbour - Burrow Island Weather Forecast

    • 18
    • 21

    Overcast

    • 18
    • 22

    Cloudy

    • 14
    • 21

    Cloudy

    • 15
    • 19

    Partly cloudy

    • 14
    • 19

    Light rain shower

    • 16
    • 18

    Partly cloudy

    • 15
    • 19

    Cloudy

Today 13 Sep London and South East England

Cloudy, humid and damp, with outbreaks of rain and drizzle, and the odd heavier burst mixed in. Gradually turning drier and brighter from the northwest through the afternoon. Winds mainly light. Maximum temperature 25 °C.

Tonight 13 Sep London and South East England

Largely cloudy but some clearer periods allowing the odd mist and fog patch to form, more especially toward the east. Winds remaining mainly light. Mild. Minimum temperature 16 °C.

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Portsmouth Harbour - Burrow Island Temperature Statistics

September Temperature

Thorney Island (14km)

  • Lowest 12 September, 2026

    9.5 °C

  • Average September

    17.3 °C

  • Highest 3 September, 2026

    23.5 °C

Climate (2021–2026)

Thorney Island (14km)

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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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