Thames River - Green Harbor Weather Forecast

    • 56
    • 77

    Becoming Sunny

    • 54
    • 71

    Sunny

    • 60
    • 71

    Mostly Sunny

    • 62
    • 72

    Chance Rain Showers

    • 65
    • 86

    Slight Chance Thunderstorms

    • 65
    • 84

    Partly Sunny

Today 7 Jun Southern New London

Sunny. Highs in the lower 80s. West Winds around 10 Mph with Gusts up to 20 Mph.

Tonight 7 Jun Southern New London

Partly cloudy with a 20 percent chance of Showers. Lows in the mid 50s. North Winds 5 to 10 Mph. Gusts up to 20 Mph in the evening.

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Thames River - Green Harbor Temperature Statistics

June Temperature

Groton / New London, Groton / New London Airport (2.5 miles)

  • Lowest 2 June, 2026

    42.1 °F

  • Average June

    60.4 °F

  • Highest 5 June, 2026

    80.1 °F

Climate (2021–Present)

Groton / New London, Groton / New London Airport (2.5 miles)

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  • Average Low 2021–2026

    45.3 °F

  • Average 2021–2026

    53.2 °F

  • Average High 2021–2026

    60.7 °F
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