Portland Harbour Weather Forecast

    • 8
    • 10

    Light rain shower

    • 4
    • 9

    Light rain

    • 7
    • 9

    Cloudy

    • 7
    • 8

    Light rain

    • 7
    • 10

    Cloudy

    • 7
    • 10

    Cloudy

    • 6
    • 9

    Overcast

Today 31 Jan South West England

Cloudy for many with some showers through the morning, mostly along the south coast. A band of heavier showers moves eastwards through the morning, which can leave drier spells across Devon and Cornwall later. Maximum temperature 10 °C.

Tonight 31 Jan South West England

Showers continue overnight, most being light with the odd heavier downpour during the early hours. Showers easing by down and winds die down to a light breeze. Staying frost free. Minimum temperature 6 °C.

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Portland Harbour Temperature Statistics

January Temperature

Isle Of Portland (6km)

  • Lowest 5 January, 2026

    0.3 °C

  • Average January

    7.5 °C

  • Highest 12 January, 2026

    10.9 °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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