Sidlesham Weather Forecast

    • 13
    • 23

    Partly cloudy

    • 15
    • 19

    Cloudy

    • 13
    • 22

    Sunny day

    • 12
    • 20

    Cloudy

    • 14
    • 19

    Partly cloudy

    • 16
    • 19

    Partly cloudy

    • 17
    • 21

    Light rain shower

Today 23 Sep London and South East England

Dry with sunny spells to start. Cloud builds and while many areas remain dry, isolated heavy showers may develop in the far east through the afternoon. Clear and cold overnight. Maximum temperature 24 °C.

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Sidlesham Temperature Statistics

September Temperature

Thorney Island (10km)

  • Lowest 21 September, 2026

    8.8 °C

  • Average September

    17.3 °C

  • Highest 3 September, 2026

    23.5 °C

Climate (2021–2026)

Thorney Island (10km)

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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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