Portland Harbour Weather Forecast

    • 13
    • 19

    Cloudy

    • 13
    • 19

    Sunny day

    • 12
    • 19

    Sunny day

    • 11
    • 20

    Partly cloudy

    • 14
    • 18

    Partly cloudy

    • 14
    • 19

    Sunny day

    • 14
    • 19

    Partly cloudy

Today 20 Sep South West England

A fine day with a mixture of cloud and sunny spells, with some prolonged periods of sunshine developing in places. Much lighter winds than on Saturday and feeling pleasantly warm. Maximum temperature 20 °C.

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Portland Harbour Temperature Statistics

September Temperature

Isle Of Portland (6km)

  • Lowest 10 September, 2026

    14.2 °C

  • Average September

    17.5 °C

  • Highest 6 September, 2026

    21.6 °C

Climate (2021–2026)

Isle Of Portland (6km)

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  • Average Low 2021–2026

    10.6 °C

  • Average 2021–2026

    12.5 °C

  • Average High 2021–2026

    14.4 °C
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