Sippican Harbor - Stewart Island Weather Forecast

    • 58
    • 72

    Increasing Clouds

    • 59
    • 71

    Partly Sunny

    • 62
    • 70

    Chance Rain Showers

    • 63
    • 73

    Chance Rain Showers

    • 55
    • 75

    Mostly Sunny

    • 52
    • 65

    Mostly Sunny

Today 15 Sep Southern Plymouth

Mostly sunny. Highs in the mid 70s. Northeast Winds 5 to 10 Mph.

Tonight 15 Sep Southern Plymouth

Partly cloudy in the Evening, then becoming mostly cloudy. Lows in the upper 40s. Northeast Winds 5 to 10 Mph.

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Sippican Harbor - Stewart Island Temperature Statistics

September Temperature

New Bedford, New Bedford Regional Airport (9.9 miles)

  • Lowest 13 September, 2025

    43 °F

  • Average September

    63 °F

  • Highest 6 September, 2025

    79 °F

Climate (2020–Present)

New Bedford, New Bedford Regional Airport (9.9 miles)

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  • Average Low 2020–2025

    43.7 °F

  • Average 2020–2025

    53.2 °F

  • Average High 2020–2025

    62.4 °F
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