Fishers Island Weather Forecast

    • 66
    • 74

    Chance Rain Showers

    • 67
    • 77

    Mostly Sunny

    • 69
    • 76

    Mostly Sunny

    • 73
    • 80

    Mostly Sunny

    • 70
    • 83

    Partly Sunny

    • 68
    • 79

    Partly Sunny

Today 11 Jul Northeast Suffolk

Mostly cloudy. A slight chance of Showers Early, then a chance of Showers with a slight chance of Thunderstorms this afternoon. Highs in the lower 80s. Northeast Winds 5 to 10 Mph, becoming east this afternoon. Chance of rain 40 percent.

Tonight 11 Jul Northeast Suffolk

Mostly cloudy with a slight chance of Showers in the Evening, then mostly clear after midnight. Lows in the upper 60s. Northeast Winds around 5 Mph. Chance of rain 20 percent.

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Fishers Island Temperature Statistics

July Temperature

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

  • Lowest 6 July, 2026

    62.1 °F

  • Average July

    73.6 °F

  • Highest 3 July, 2026

    91 °F

Climate (2021–2026)

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

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  • Average Low 2021–2026

    45.3 °F

  • Average 2021–2026

    53.2 °F

  • Average High 2021–2026

    60.8 °F
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