Castle Island Weather Forecast

    • 23
    • 38

    Partly Sunny

    • 25
    • 31

    Partly Sunny

    • 29
    • 38

    Mostly Cloudy

    • 33
    • 43

    Partly Sunny

    • 32
    • 41

    Chance Rain/Snow

    • 25
    • 39

    Chance Rain/Snow

Today 14 Feb Suffolk

Mostly sunny. Highs in the upper 30s. West Winds around 5 Mph.

Tonight 14 Feb Suffolk

Partly cloudy in the Evening, then becoming mostly clear. Lows in the lower 20s. West Winds around 5 Mph. Gusts up to 20 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Castle Island Temperature Statistics

February Temperature

Boston, Logan International Airport (1.2 miles)

  • Lowest 8 February, 2026

    3.9 °F

  • Average February

    23.8 °F

  • Highest 11 February, 2026

    39.9 °F

Climate (2021–Present)

Boston, Logan International Airport (1.2 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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