Deer Island Weather Forecast

    • 69
    • 80

    Decreasing Clouds

    • 73
    • 87

    Mostly Sunny

    • 72
    • 91

    Slight Chance Thunderstorms

    • 68
    • 79

    Chance Rain Showers

    • 69
    • 78

    Chance Rain Showers

    • 69
    • 81

    Mostly Sunny

Today 23 Jul Suffolk

Mostly sunny. Highs in the mid 80s. Southwest Winds around 5 Mph, becoming south in the afternoon.

Tonight 23 Jul Suffolk

Mostly clear. Lows in the upper 60s. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Deer Island Temperature Statistics

July Temperature

Boston, Logan International Airport (2.5 miles)

  • Lowest 10 July, 2025

    63.6 °F

  • Average July

    76.5 °F

  • Highest 16 July, 2025

    95.6 °F

Climate (2020–Present)

Boston, Logan International Airport (2.5 miles)

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  • Average Low 2020–2025

    47 °F

  • Average 2020–2025

    53.8 °F

  • Average High 2020–2025

    61.1 °F
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