Hammonasset River Entrance Weather Forecast

    • 62
    • 77

    Slight Chance Rain Showers

    • 54
    • 80

    Mostly Sunny

    • 53
    • 71

    Mostly Sunny

    • 56
    • 69

    Partly Sunny

    • 60
    • 73

    Partly Sunny

    • 62
    • 77

    Partly Sunny

Today 18 Sep Southern Middlesex

Patchy fog this morning. Mostly cloudy with a slight chance of Showers this Morning, then sunny this afternoon. Highs in the upper 70s. North Winds around 5 Mph, becoming west this afternoon. Chance of rain 20 percent.

Tonight 18 Sep Southern Middlesex

Clear. Lows around 60. West Winds around 5 Mph.

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Hammonasset River Entrance Temperature Statistics

September Temperature

Chester, Chester Airport (8.7 miles)

  • Lowest 8 September, 2025

    50 °F

  • Average September

    65.1 °F

  • Highest 5 September, 2025

    82.4 °F

Climate (2020–Present)

Chester, Chester Airport (8.7 miles)

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  • Average Low 2020–2025

    45.4 °F

  • Average 2020–2025

    53.7 °F

  • Average High 2020–2025

    62.6 °F
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