Mystic Weather Forecast

    • 51
    • 68

    Rain Showers

    • 49
    • 65

    Mostly Sunny

    • 51
    • 68

    Mostly Sunny

    • 56
    • 73

    Partly Sunny

    • 60
    • 75

    Partly Sunny

    • 62
    • 77

    Chance Rain Showers

Today 31 May Southern New London

Cloudy with Showers with a chance of Thunderstorms in the Morning, then partly sunny with a chance of Showers in the afternoon. Some Thunderstorms may produce heavy rainfall in the morning. Highs in the upper 60s. South Winds 5 to 10 Mph, becoming west 10 to 15 Mph in the afternoon. Gusts up to 25 Mph. Chance of rain 90 percent.

Tonight 31 May Southern New London

Showers with a slight chance of Thunderstorms. Areas of fog. Near steady temperature in the upper 50s. Southeast Winds around 5 Mph. Chance of rain near 100 percent.

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Mystic Temperature Statistics

May Temperature

Groton / New London, Groton / New London Airport (4.3 miles)

  • Lowest 12 May, 2025

    40.6 °F

  • Average May

    58.2 °F

  • Highest 11 May, 2025

    75.7 °F

Climate (2020–Present)

Groton / New London, Groton / New London Airport (4.3 miles)

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  • Average Low 2020–2025

    45.7 °F

  • Average 2020–2025

    53.6 °F

  • Average High 2020–2025

    61.2 °F
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