Boston Harbor Islands State Park Weather Forecast

    • 63
    • 75

    Mostly Sunny

    • 60
    • 72

    Rain Showers

    • 48
    • 65

    Rain Showers

    • 46
    • 53

    Sunny

    • 50
    • 58

    Mostly Sunny

    • 54
    • 62

    Partly Sunny

Today 6 Oct Eastern Plymouth

Sunny. Highs in the upper 70s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 6 Oct Eastern Plymouth

Mostly clear in the Evening, then becoming partly cloudy. Patchy fog after midnight. Lows in the upper 50s. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Boston Harbor Islands State Park Temperature Statistics

October Temperature

Boston, Logan International Airport (5.6 miles)

  • Lowest 2 October, 2025

    46.9 °F

  • Average October

    60.2 °F

  • Highest 4 October, 2025

    79 °F

Climate (2020–Present)

Boston, Logan International Airport (5.6 miles)

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  • Average Low 2020–2025

    47 °F

  • Average 2020–2025

    53.8 °F

  • Average High 2020–2025

    61.2 °F
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