Niantic River Mouth Weather Forecast

    • 20
    • 44

    Gradual Clearing

    • 28
    • 35

    Partly Sunny

    • 29
    • 42

    Chance Rain

    • 21
    • 38

    Chance Snow

    • 16
    • 32

    Partly Sunny

    • 12
    • 25

    Partly Sunny

Today 15 Jan Southern New London

Mostly cloudy. A slight chance of rain Showers early. Highs in the mid 40s. South Winds 5 to 10 Mph with Gusts up to 20 Mph, becoming southwest 10 to 15 Mph with Gusts up to 30 Mph this afternoon. Chance of rain 20 percent.

Tonight 15 Jan Southern New London

Mostly cloudy. Cooler with Lows in the lower 20s. West Winds 15 to 20 Mph with Gusts up to 30 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Niantic River Mouth Temperature Statistics

January Temperature

Groton / New London, Groton / New London Airport (6.2 miles)

  • Lowest 1 January, 2026

    16 °F

  • Average January

    33.1 °F

  • Highest 8 January, 2026

    50 °F

Climate (2021–Present)

Groton / New London, Groton / New London Airport (6.2 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    45.5 °F

  • Average 2021–2026

    53.4 °F

  • Average High 2021–2026

    60.9 °F
Get WillyWeather+ to remove ads