Fishers Island Weather Forecast

    • 68
    • 74

    Mostly Sunny

    • 68
    • 75

    Chance Rain Showers

    • 67
    • 74

    Mostly Cloudy

    • 69
    • 73

    Rain Showers Likely

    • 70
    • 75

    Chance Rain Showers

    • 68
    • 76

    Chance Rain Showers

    • 66
    • 74

    Partly Sunny

Today 29 Aug Northeast Suffolk

Sunny. Near steady temperature in the lower 70s. West Winds around 5 Mph.

Tonight 29 Aug Northeast Suffolk

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

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Fishers Island Temperature Statistics

August Temperature

Groton / New London, Groton / New London Airport (4.3 miles)

  • Lowest 5 August, 2026

    59 °F

  • Average August

    72.2 °F

  • Highest 7 August, 2026

    86 °F

Climate (2021–2026)

Groton / New London, Groton / New London Airport (4.3 miles)

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  • Average Low 2021–2026

    45.2 °F

  • Average 2021–2026

    53.2 °F

  • Average High 2021–2026

    60.8 °F
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