Fishers Island Weather Forecast

    • 50
    • 67

    Rain Showers

    • 40
    • 52

    Rain Likely

    • 46
    • 53

    Mostly Sunny

    • 50
    • 58

    Slight Chance Rain Showers

    • 53
    • 61

    Breezy

    • 51
    • 61

    Chance Rain Showers

    • 51
    • 59

    Slight Chance Rain Showers

Today 16 Oct Northeast Suffolk

Mostly sunny. Highs in the lower 60s.

Tonight 16 Oct Northeast Suffolk

Showers with a chance of Thunderstorms this Evening, then rain likely after midnight. Some Thunderstorms may produce gusty Winds this evening. Breezy with Lows in the lower 50s. Southwest Winds 15 to 20 Mph, becoming northwest 20 to 25 Mph after midnight. Chance of rain 90 percent.

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Fishers Island Temperature Statistics

October Temperature

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

  • Lowest 7 October, 2026

    36 °F

  • Average October

    59.1 °F

  • Highest 14 October, 2026

    75 °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

    60.7 °F
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