Boston Harbor Islands State Park Weather Forecast

    • 55
    • 69

    Chance Rain Showers

    • 54
    • 62

    Sunny

    • 56
    • 64

    Mostly Sunny

    • 62
    • 66

    Rain Showers Likely

    • 58
    • 66

    Slight Chance Rain Showers

    • 48
    • 61

    Chance Rain Showers

Today 8 Oct Eastern Plymouth

Partly sunny. A slight chance of Showers in the Morning, then a chance of Showers in the afternoon. Highs in the lower 70s. Southwest Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 30 percent.

Tonight 8 Oct Eastern Plymouth

Mostly clear. Lows in the upper 40s. West Winds 5 to 10 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 4 October, 2026

    50 °F

  • Average October

    65.3 °F

  • Highest 2 October, 2026

    87.7 °F

Climate (2021–2026)

Boston, Logan International Airport (5.6 miles)

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  • Average Low 2021–2026

    46.6 °F

  • Average 2021–2026

    53.6 °F

  • Average High 2021–2026

    61 °F
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