Pattagansett Lake Weather Forecast

    • 66
    • 90

    Mostly Sunny

    • 70
    • 87

    Chance Rain Showers

    • 65
    • 87

    Slight Chance Thunderstorms

    • 66
    • 84

    Chance Rain Showers

    • 64
    • 83

    Chance Rain Showers

    • 58
    • 81

    Mostly Sunny

Today 9 Aug Southern New London

Sunny with Highs in the upper 80s. West Winds 5 to 10 Mph. Heat index Values in the mid 90s.

Tonight 9 Aug Southern New London

Mostly clear. Lows in the upper 60s. Northwest Winds around 5 Mph.

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Pattagansett Lake Temperature Statistics

August Temperature

Groton / New London, Groton / New London Airport (9.3 miles)

  • Lowest 5 August, 2026

    59 °F

  • Average August

    73 °F

  • Highest 6 August, 2026

    82.9 °F

Climate (2021–2026)

Groton / New London, Groton / New London Airport (9.3 miles)

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  • Average Low 2021–2026

    45.3 °F

  • Average 2021–2026

    53.3 °F

  • Average High 2021–2026

    60.8 °F
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