Portland Harbour Weather Forecast

    • 9
    • 11

    Partly cloudy

    • 8
    • 12

    Sunny day

    • 8
    • 10

    Overcast

    • 8
    • 12

    Cloudy

    • 8
    • 13

    Sunny day

    • 7
    • 12

    Cloudy

Today 4 Mar South West England

A fine day on Wednesday, with sunny spells. Most likely dry on Thursday, but rain possible by the evening. This clearing to leave another dry and sunny day on Friday.

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Portland Harbour Temperature Statistics

March Temperature

Isle Of Portland (6km)

  • Lowest 3 March, 2026

    8.2 °C

  • Average March

    9.7 °C

  • Highest 2 March, 2026

    11.9 °C

Climate (2021–Present)

Isle Of Portland (6km)

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  • Average Low 2021–2026

    10.4 °C

  • Average 2021–2026

    12.2 °C

  • Average High 2021–2026

    14.1 °C
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