Sully Island Weather Forecast

    • 14
    • 20

    Cloudy

    • 13
    • 20

    Sunny day

    • 14
    • 21

    Sunny day

    • 15
    • 21

    Sunny day

    • 16
    • 22

    Sunny day

    • 17
    • 24

    Sunny day

Today 6 Jul Wales

Sunday morning still looks rather cloudy, with showery outbreaks of rain and some hill fog at first. It should become drier towards lunchtime though, with a brighter afternoon expected. Maximum Temperature 19C.

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Sully Island Temperature Statistics

July Temperature

St-athan (16km)

  • Lowest 3 July, 2025

    10.6 °C

  • Average July

    16.8 °C

  • Highest 1 July, 2025

    21 °C

Climate (2020–Present)

St-athan (16km)

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  • Average Low 2020–2025

    8.7 °C

  • Average 2020–2025

    11.6 °C

  • Average High 2020–2025

    14.4 °C
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