Thames River - Green Harbor Weather Forecast

    • 73
    • 86

    Mostly Sunny

    • 67
    • 84

    Chance Thunderstorms

    • 60
    • 69

    Chance Rain Showers

    • 61
    • 64

    Chance Rain Showers

    • 65
    • 67

    Chance Rain Showers

    • 67
    • 74

    Mostly Cloudy

Today 24 Jun Southern New London

Patchy fog this morning. Sunny. Highs in the lower 90s. West Winds 5 to 10 Mph. Heat index Values up to 103.

Tonight 24 Jun Southern New London

Mostly clear. Humid with Lows in the mid 70s. West Winds 5 to 10 Mph.

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Thames River - Green Harbor Temperature Statistics

June Temperature

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

  • Lowest 3 June, 2025

    47.6 °F

  • Average June

    66 °F

  • Highest 5 June, 2025

    83.6 °F

Climate (2020–Present)

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

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  • Average Low 2020–2025

    45.7 °F

  • Average 2020–2025

    53.6 °F

  • Average High 2020–2025

    61.2 °F
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