Harwich Port Weather Forecast

    • 70
    • 77

    Chance Rain Showers

    • 67
    • 77

    Mostly Cloudy

    • 67
    • 73

    Partly Sunny

    • 68
    • 77

    Slight Chance Rain Showers

    • 65
    • 78

    Slight Chance Rain Showers

    • 65
    • 75

    Chance Rain Showers

Today 27 Aug Barnstable

Mostly sunny. Near steady temperature in the upper 70s. South Winds 10 to 15 Mph.

Tonight 27 Aug Barnstable

Mostly cloudy with isolated Showers. Patchy fog after midnight. Humid with Lows around 70. South Winds 5 to 10 Mph. Gusts up to 20 Mph in the evening. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Harwich Port Temperature Statistics

August Temperature

Chatham, Chatham Municipal Airport (4.3 miles)

  • Lowest 16 August, 2026

    59 °F

  • Average August

    73 °F

  • Highest 11 August, 2026

    84.9 °F

Climate (2021–2026)

Chatham, Chatham Municipal Airport (4.3 miles)

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  • Average Low 2021–2026

    47.3 °F

  • Average 2021–2026

    53.7 °F

  • Average High 2021–2026

    59.7 °F
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