Boston Harbor Islands State Park Weather Forecast

    • 38
    • 49

    Mostly Sunny

    • 48
    • 60

    Chance Rain Showers

    • 41
    • 54

    Mostly Sunny

    • 47
    • 55

    Mostly Cloudy

    • 60
    • 64

    Slight Chance Rain Showers

    • 58
    • 75

    Chance Rain Showers

Today 9 Apr Eastern Plymouth

Sunny. Not as cool with Highs in the lower 50s. Southeast Winds 10 to 15 Mph.

Tonight 9 Apr Eastern Plymouth

Mostly clear. Patchy fog after midnight. Lows in the lower 30s. South Winds 5 to 10 Mph. Gusts up to 20 Mph in the evening.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Boston Harbor Islands State Park Temperature Statistics

April Temperature

Boston, Logan International Airport (5.6 miles)

  • Lowest 2 April, 2026

    37.7 °F

  • Average April

    48.2 °F

  • Highest 1 April, 2026

    71.7 °F

Climate (2021–Present)

Boston, Logan International Airport (5.6 miles)

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  • Average Low 2021–2026

    46.8 °F

  • Average 2021–2026

    53.6 °F

  • Average High 2021–2026

    61 °F
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