Thames River - Green Harbor Weather Forecast

    • 65
    • 80

    Increasing Clouds

    • 69
    • 74

    Mostly Sunny

    • 65
    • 78

    Chance Rain Showers

    • 60
    • 70

    Partly Sunny

    • 61
    • 70

    Partly Sunny

    • 61
    • 70

    Slight Chance Rain Showers

    • 62
    • 72

    Mostly Sunny

Today 15 Aug Southern New London

Sunny. Highs in the mid 80s. Southeast Winds 5 to 10 Mph.

Tonight 15 Aug Southern New London

Mostly clear in the Evening, then becoming partly cloudy. Patchy fog after midnight. Lows in the lower 60s. East Winds around 5 Mph.

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Thames River - Green Harbor Temperature Statistics

August Temperature

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

  • Lowest 2 August, 2025

    57 °F

  • Average August

    73.1 °F

  • Highest 8 August, 2025

    95.6 °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

    61.1 °F
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