Niantic River Mouth Weather Forecast

    • 60
    • 75

    Increasing Clouds

    • 65
    • 77

    Rain Showers Likely

    • 62
    • 80

    Mostly Sunny

    • 59
    • 78

    Mostly Sunny

    • 61
    • 77

    Rain Showers Likely

    • 62
    • 75

    Rain Showers Likely

    • 62
    • 79

    Partly Sunny

Today 17 Jun Southern New London

Sunny. Highs in the mid 70s. South Winds around 10 Mph.

Tonight 17 Jun Southern New London

Partly cloudy in the Evening, then becoming mostly cloudy. Lows around 60. South Winds around 5 Mph.

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Niantic River Mouth Temperature Statistics

June Temperature

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

  • Lowest 2 June, 2026

    42.1 °F

  • Average June

    65.9 °F

  • Highest 11 June, 2026

    87.1 °F

Climate (2021–2026)

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

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  • Average Low 2021–2026

    45.3 °F

  • Average 2021–2026

    53.2 °F

  • Average High 2021–2026

    60.7 °F
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