Boston Harbor Islands State Park Weather Forecast

    • 67
    • 74

    Mostly Sunny

    • 70
    • 82

    Increasing Clouds

    • 67
    • 82

    Rain Showers Likely

    • 66
    • 75

    Partly Sunny

    • 66
    • 72

    Mostly Sunny

    • 69
    • 80

    Mostly Sunny

    • 72
    • 84

    Mostly Sunny

Today 8 Jul Eastern Plymouth

Sunny. Near steady temperature in the upper 70s. Northeast Winds 5 to 10 Mph.

Tonight 8 Jul Eastern Plymouth

Mostly clear. Lows in the mid 60s. Southwest Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Boston Harbor Islands State Park Temperature Statistics

July Temperature

Boston, Logan International Airport (5.6 miles)

  • Lowest 6 July, 2026

    66 °F

  • Average July

    82.2 °F

  • Highest 2 July, 2026

    101.6 °F

Climate (2021–2026)

Boston, Logan International Airport (5.6 miles)

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  • Average Low 2021–2026

    46.7 °F

  • Average 2021–2026

    53.6 °F

  • Average High 2021–2026

    61 °F
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