Codman Island Weather Forecast

    • 32
    • 45

    Rain/Snow

    • 25
    • 44

    Slight Chance Rain

    • 27
    • 39

    Rain/Snow Likely

    • 21
    • 39

    Chance Snow

    • 22
    • 38

    Partly Sunny

    • 21
    • 41

    Slight Chance Rain/Snow

Today 20 Mar Knox

Mostly sunny this Morning, then mostly cloudy with a chance of rain this afternoon. Highs in the mid 40s. Light and variable Winds, becoming south around 10 Mph this afternoon. Chance of rain 50 percent.

Tonight 20 Mar Knox

Cloudy. Rain likely with snow in the Evening, then a chance of rain after midnight. Snow accumulation up to 1 inch. Lows in the lower 30s. South Winds around 10 Mph, becoming west after midnight. Gusts up to 25 Mph. Chance of precipitation 90 percent.

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Codman Island Temperature Statistics

March Temperature

Rockland, Knox County Regional Airport (11.2 miles)

  • Lowest 2 March, 2026

    3 °F

  • Average March

    34.7 °F

  • Highest 10 March, 2026

    57 °F

Climate (2021–Present)

Rockland, Knox County Regional Airport (11.2 miles)

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  • Average Low 2021–2026

    39.6 °F

  • Average 2021–2026

    47.7 °F

  • Average High 2021–2026

    55 °F
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