Harwich Weather Forecast

    • 69
    • 85

    Becoming Sunny

    • 67
    • 78

    Mostly Sunny

    • 67
    • 83

    Partly Sunny

    • 67
    • 82

    Rain Showers

    • 67
    • 82

    Slight Chance Rain Showers

    • 69
    • 81

    Slight Chance Rain Showers

Today 15 Jul Barnstable

Mostly sunny. Hazy. Highs in the mid 80s. Northwest Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 15 Jul Barnstable

Partly cloudy in the Evening, then clearing. Hazy. Lows in the upper 60s. Northwest Winds around 5 Mph.

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Harwich Temperature Statistics

July Temperature

Chatham, Chatham Municipal Airport (4.3 miles)

  • Lowest 13 July, 2026

    59 °F

  • Average July

    72.1 °F

  • Highest 3 July, 2026

    91 °F

Climate (2021–2026)

Chatham, Chatham Municipal Airport (4.3 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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