Mystic River - Island End River Weather Forecast

    • 49
    • 66

    Mostly Sunny

    • 52
    • 62

    Chance Rain Showers

    • 45
    • 69

    Mostly Sunny

    • 43
    • 59

    Sunny

    • 48
    • 62

    Mostly Sunny

    • 52
    • 68

    Mostly Sunny

Today 3 Oct Suffolk

Sunny and much cooler. Near steady temperature in the mid 60s. North Winds 5 to 10 Mph, becoming east.

Tonight 3 Oct Suffolk

Mostly clear. Patchy fog after midnight. Lows around 50. Northeast Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mystic River - Island End River Temperature Statistics

October Temperature

Boston, Logan International Airport (2.5 miles)

  • Lowest 1 October, 2026

    60.1 °F

  • Average October

    67.2 °F

  • Highest 1 October, 2026

    77 °F

Climate (2021–2026)

Boston, Logan International Airport (2.5 miles)

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  • Average Low 2021–2026

    46.6 °F

  • Average 2021–2026

    53.6 °F

  • Average High 2021–2026

    60.9 °F
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