Castlewellan Weather Forecast

    • 1
    • 10

    Light rain shower

    • 3
    • 8

    Light rain shower

    • 5
    • 11

    Light rain

    • 8
    • 10

    Overcast

    • 8
    • 13

    Overcast

    • 4
    • 11

    Cloudy

    • 4
    • 10

    Cloudy

Today 27 Mar Northern Ireland

The morning will be mainly dry with sunny spells. By the afternoon occasional showers will develop, with a southwesterly breeze freshening up. Maximum temperature 10 °C.

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Castlewellan Temperature Statistics

March Temperature

Glenanne (36km)

  • Lowest 13 March, 2026

    0.9 °C

  • Average March

    6.6 °C

  • Highest 19 March, 2026

    15.2 °C

Climate (2021–Present)

Glenanne (36km)

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  • Average Low 2021–2026

    6.8 °C

  • Average 2021–2026

    9.7 °C

  • Average High 2021–2026

    12.7 °C
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