Deer Island Weather Forecast

    • 39
    • 50

    Chance Rain/Snow

    • 35
    • 46

    Rain/Snow Likely

    • 31
    • 40

    Chance Rain/Snow

    • 35
    • 43

    Mostly Cloudy

    • 34
    • 49

    Slight Chance Rain

    • 39
    • 46

    Chance Rain/Snow

Today 21 Mar Suffolk

Mostly cloudy this Morning, then becoming mostly sunny. Highs in the upper 40s. Northwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 21 Mar Suffolk

Mostly cloudy. A slight chance of snow after midnight. Lows in the upper 30s. North Winds 5 to 10 Mph, becoming northeast after midnight. Chance of snow 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Deer Island Temperature Statistics

March Temperature

Boston, Logan International Airport (2.5 miles)

  • Lowest 2 March, 2026

    12.7 °F

  • Average March

    40.6 °F

  • Highest 10 March, 2026

    75.7 °F

Climate (2021–Present)

Boston, Logan International Airport (2.5 miles)

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  • Average Low 2021–2026

    46.8 °F

  • Average 2021–2026

    53.7 °F

  • Average High 2021–2026

    61 °F
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