Portland Harbour Weather Forecast

    • 16
    • 19

    Overcast

    • 15
    • 18

    Cloudy

    • 12
    • 18

    Light rain shower

    • 9
    • 14

    Partly cloudy

    • 9
    • 15

    Sunny day

    • 10
    • 15

    Sunny day

    • 10
    • 16

    Partly cloudy

Today 18 Sep South West England

A cloudy and mild start to Thursday with some drizzle in places. Turning drier and somewhat brighter through the afternoon with sunny intervals. Feeling humid and staying windy. Maximum Temperature 20C.

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Portland Harbour Temperature Statistics

September Temperature

Isle Of Portland (6km)

  • Lowest 11 September, 2025

    12.7 °C

  • Average September

    16.3 °C

  • Highest 6 September, 2025

    19.8 °C

Climate (2020–Present)

Isle Of Portland (6km)

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  • Average Low 2020–2025

    10.3 °C

  • Average 2020–2025

    12.1 °C

  • Average High 2020–2025

    14 °C
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