Niantic Weather Forecast

    • 59
    • 65

    Rain

    • 53
    • 68

    Mostly Cloudy

    • 48
    • 66

    Chance Rain Showers

    • 51
    • 66

    Mostly Cloudy

    • 51
    • 64

    Chance Rain Showers

    • 51
    • 64

    Chance Rain Showers

Today 20 Sep Southern New London

Rain. Highs in the mid 60s. Southeast Winds 5 to 10 Mph. Gusts up to 20 Mph this afternoon. Chance of rain near 100 percent.

Tonight 20 Sep Southern New London

Periods of rain. Lows in the upper 50s. Southeast Winds 5 to 10 Mph, becoming northeast with Gusts up to 20 Mph after midnight. Chance of rain near 100 percent.

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Niantic Temperature Statistics

September Temperature

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

  • Lowest 15 September, 2026

    50 °F

  • Average September

    68 °F

  • Highest 4 September, 2026

    82 °F

Climate (2021–2026)

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

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  • Average Low 2021–2026

    45.2 °F

  • Average 2021–2026

    53.2 °F

  • Average High 2021–2026

    60.8 °F
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