Harwich Port Weather Forecast

    • 55
    • 73

    Increasing Clouds

    • 57
    • 64

    Partly Sunny

    • 60
    • 73

    Mostly Sunny

    • 54
    • 72

    Chance Rain Showers

    • 51
    • 66

    Chance Rain Showers

    • 51
    • 62

    Slight Chance Rain Showers

Today 17 May Barnstable

Sunny. Highs in the mid 70s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 17 May Barnstable

Mostly clear in the Evening, then becoming partly cloudy. Lows in the mid 50s. West Winds 10 to 15 Mph with Gusts up to 25 Mph, becoming northeast around 5 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Harwich Port Temperature Statistics

May Temperature

Chatham, Chatham Municipal Airport (4.3 miles)

  • Lowest 8 May, 2026

    42.1 °F

  • Average May

    52.4 °F

  • Highest 6 May, 2026

    63 °F

Climate (2021–Present)

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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