Thames River - New London Weather Forecast

    • 46
    • 56

    Rain Showers Likely

    • 31
    • 49

    Rain Showers Likely

    • 29
    • 39

    Partly Sunny

    • 38
    • 44

    Mostly Cloudy

    • 44
    • 51

    Mostly Cloudy

    • 40
    • 52

    Chance Rain

Today 26 Mar Southern New London

Mostly cloudy with a slight chance of rain Early, then partly sunny this afternoon. Highs in the upper 50s. Southwest Winds 10 to 15 Mph. Gusts up to 25 Mph. Chance of rain 20 percent.

Tonight 26 Mar Southern New London

A chance of Showers in the Evening, then Showers likely after midnight. Lows in the mid 40s. Southwest Winds 10 to 15 Mph, becoming west after midnight. Gusts up to 30 Mph. Chance of rain 70 percent.

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Thames River - New London Temperature Statistics

March Temperature

Groton / New London, Groton / New London Airport (3.1 miles)

  • Lowest 3 March, 2026

    12 °F

  • Average March

    38.2 °F

  • Highest 9 March, 2026

    63 °F

Climate (2021–Present)

Groton / New London, Groton / New London Airport (3.1 miles)

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  • Average Low 2021–2026

    45.3 °F

  • Average 2021–2026

    53.2 °F

  • Average High 2021–2026

    60.8 °F
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