South Harwich Weather Forecast

    • 54
    • 63

    Increasing Clouds

    • 49
    • 65

    Rain Showers Likely

    • 47
    • 61

    Chance Rain Showers

    • 45
    • 60

    Partly Sunny

    • 40
    • 57

    Partly Sunny

    • 41
    • 56

    Partly Sunny

Today 21 Oct Barnstable

Sunny. Highs in the lower 60s. Southwest Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 21 Oct Barnstable

Partly cloudy in the Evening, then mostly cloudy with a chance of Showers after midnight. Near steady temperature in the mid 50s. South Winds 10 to 15 Mph. Gusts up to 30 Mph, decreasing to 20 Mph after midnight. Chance of rain 50 percent.

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South Harwich Temperature Statistics

October Temperature

Chatham, Chatham Municipal Airport (2.5 miles)

  • Lowest 10 October, 2025

    39 °F

  • Average October

    57.1 °F

  • Highest 5 October, 2025

    77 °F

Climate (2020–Present)

Chatham, Chatham Municipal Airport (2.5 miles)

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  • Average Low 2020–2025

    47.7 °F

  • Average 2020–2025

    54 °F

  • Average High 2020–2025

    60.1 °F
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