Thames River - Green Harbor Weather Forecast

    • 37
    • 39

    Chance Snow

    • 27
    • 42

    Increasing Clouds

    • 8
    • 34

    Partly Sunny

    • 10
    • 16

    Snow Likely

    • 20
    • 24

    Snow

    • 14
    • 27

    Chance Snow

    • 15
    • 24

    Mostly Sunny

Today 21 Jan Southern New London

Partly sunny. Not as cool with Highs in the upper 30s. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 21 Jan Southern New London

Cloudy. A chance of rain and Snow, mainly this evening. Not as cool with Lows in the mid 30s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of precipitation 50 percent.

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Thames River - Green Harbor Temperature Statistics

January Temperature

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

  • Lowest 1 January, 2026

    16 °F

  • Average January

    33.6 °F

  • Highest 8 January, 2026

    50 °F

Climate (2021–Present)

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

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  • Average Low 2021–2026

    45.4 °F

  • Average 2021–2026

    53.4 °F

  • Average High 2021–2026

    60.9 °F
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