South Harwich Weather Forecast

    • 63
    • 77

    Becoming Sunny

    • 64
    • 75

    Chance Rain Showers

    • 64
    • 72

    Slight Chance Thunderstorms

    • 67
    • 77

    Mostly Sunny

    • 67
    • 80

    Mostly Sunny

    • 62
    • 76

    Partly Sunny

Today 20 Jun Barnstable

Sunny. Highs around 80. Southwest Winds 15 to 20 Mph with Gusts up to 40 Mph.

Tonight 20 Jun Barnstable

Mostly clear in the Evening, then becoming partly cloudy. Lows in the lower 60s. West Winds 10 to 15 Mph. Gusts up to 30 Mph in the evening.

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  • Temperature Real-Time

South Harwich Temperature Statistics

June Temperature

Chatham, Chatham Municipal Airport (2.5 miles)

  • Lowest 1 June, 2025

    51.7 °F

  • Average June

    62.9 °F

  • Highest 5 June, 2025

    77.6 °F

Climate (2020–Present)

Chatham, Chatham Municipal Airport (2.5 miles)

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  • Average Low 2020–2025

    47.9 °F

  • Average 2020–2025

    54.1 °F

  • Average High 2020–2025

    60.2 °F
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