South Harwich Weather Forecast

    • 64
    • 70

    Increasing Clouds

    • 66
    • 73

    Mostly Sunny

    • 67
    • 74

    Chance Rain Showers

    • 67
    • 74

    Rain Showers

    • 66
    • 75

    Chance Rain Showers

    • 68
    • 76

    Partly Sunny

    • 69
    • 77

    Partly Sunny

Today 26 Jul Barnstable

Sunny. Near steady temperature in the upper 60s. Northeast Winds 5 to 10 Mph.

Tonight 26 Jul Barnstable

Mostly cloudy. Lows in the lower 60s. North Winds 5 to 10 Mph.

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South Harwich Temperature Statistics

July Temperature

Chatham, Chatham Municipal Airport (2.5 miles)

  • Lowest 20 July, 2026

    57.9 °F

  • Average July

    71.8 °F

  • Highest 3 July, 2026

    91 °F

Climate (2021–2026)

Chatham, Chatham Municipal Airport (2.5 miles)

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  • Average Low 2021–2026

    47.4 °F

  • Average 2021–2026

    53.7 °F

  • Average High 2021–2026

    59.8 °F
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