Mason's Island Weather Forecast

    • 54
    • 63

    Increasing Clouds

    • 45
    • 65

    Mostly Sunny

    • 48
    • 57

    Mostly Cloudy

    • 53
    • 63

    Chance Rain Showers

    • 47
    • 63

    Chance Rain Showers

    • 47
    • 60

    Partly Sunny

Today 29 Apr Southern New London

Sunny. Highs in the upper 60s. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph, increasing to 15 to 20 Mph with Gusts up to 30 Mph this afternoon.

Tonight 29 Apr Southern New London

Partly cloudy in the Evening, then mostly cloudy with a slight chance of Showers after midnight. Lows in the mid 50s. Southwest Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain 20 percent.

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Mason's Island Temperature Statistics

April Temperature

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

  • Lowest 10 April, 2025

    27.8 °F

  • Average April

    48.1 °F

  • Highest 4 April, 2025

    70.6 °F

Climate (2020–Present)

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

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  • Average Low 2020–2025

    45.6 °F

  • Average 2020–2025

    53.4 °F

  • Average High 2020–2025

    61.1 °F
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