Northwest Harwich Weather Forecast

    • 67
    • 81

    Increasing Clouds

    • 70
    • 81

    Partly Sunny

    • 72
    • 84

    Partly Sunny

    • 72
    • 84

    Partly Sunny

    • 72
    • 83

    Partly Sunny

    • 71
    • 83

    Partly Sunny

Today 4 Aug Barnstable

Mostly sunny. Highs around 80. West Winds around 5 Mph, becoming southwest in the afternoon.

Tonight 4 Aug Barnstable

Mostly cloudy. Lows in the mid 60s. Southwest Winds 5 to 10 Mph.

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Northwest Harwich Temperature Statistics

August Temperature

Chatham, Chatham Municipal Airport (5.6 miles)

  • Lowest 1 August, 2026

    68 °F

  • Average August

    72.6 °F

  • Highest 1 August, 2026

    77 °F

Climate (2021–2026)

Chatham, Chatham Municipal Airport (5.6 miles)

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  • Average Low 2021–2026

    47.4 °F

  • Average 2021–2026

    53.7 °F

  • Average High 2021–2026

    59.7 °F
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