Niantic Weather Forecast

    • 37
    • 56

    Mostly Cloudy

    • 35
    • 53

    Rain

    • 27
    • 44

    Chance Rain/Snow

    • 32
    • 45

    Partly Sunny

    • 33
    • 49

    Mostly Cloudy

    • 36
    • 47

    Rain Likely

Today 21 Mar Southern New London

Sunny. Highs in the mid 50s. Northwest Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 21 Mar Southern New London

Mostly cloudy. A slight chance of rain after midnight. Lows in the upper 30s. North Winds around 5 Mph, becoming southeast after midnight. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Niantic Temperature Statistics

March Temperature

Groton / New London, Groton / New London Airport (6.8 miles)

  • Lowest 3 March, 2026

    12 °F

  • Average March

    37.3 °F

  • Highest 9 March, 2026

    63 °F

Climate (2021–Present)

Groton / New London, Groton / New London Airport (6.8 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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