Mason's Island - Peggy Bay Weather Forecast

    • 29
    • 35

    Increasing Clouds

    • 30
    • 44

    Mostly Sunny

    • 47
    • 52

    Rain Showers

    • 26
    • 52

    Chance Rain Showers

    • 33
    • 41

    Mostly Cloudy

    • 27
    • 45

    Partly Sunny

Today 16 Dec Southern New London

Sunny. Highs in the lower 30s. Southwest Winds 5 to 10 Mph.

Tonight 16 Dec Southern New London

Mostly cloudy in the Evening, then clearing. Lows in the mid 20s. Southwest Winds 5 to 10 Mph. Gusts up to 20 Mph after midnight.

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Mason's Island - Peggy Bay Temperature Statistics

December Temperature

Groton / New London, Groton / New London Airport (3.7 miles)

  • Lowest 5 December, 2025

    12.9 °F

  • Average December

    31.9 °F

  • Highest 10 December, 2025

    48.9 °F

Climate (2020–Present)

Groton / New London, Groton / New London Airport (3.7 miles)

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  • Average Low 2020–2025

    45.5 °F

  • Average 2020–2025

    53.4 °F

  • Average High 2020–2025

    61 °F
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