Castle Island Weather Forecast

    • 25
    • 46

    Mostly Sunny

    • 12
    • 35

    Chance Snow

    • 14
    • 25

    Partly Sunny

    • 35
    • 40

    Chance Rain/Snow

    • 33
    • 44

    Slight Chance Rain

    • 40
    • 48

    Chance Rain

Today 28 Feb Suffolk

Mostly sunny. Highs in the upper 40s. Southwest Winds 5 to 10 Mph with Gusts up to 25 Mph.

Tonight 28 Feb Suffolk

Mostly cloudy in the Evening, then becoming partly cloudy. Patchy fog after midnight. Lows in the mid 20s. Southwest Winds around 5 Mph, becoming northwest 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

    4.6 °F

  • Average February

    28.2 °F

  • Highest 13 February, 2026

    40.6 °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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