Pleasant Bay - Sipson Island Weather Forecast

    • 59
    • 65

    Rain Showers Likely

    • 57
    • 64

    Chance Rain Showers

    • 56
    • 62

    Mostly Cloudy

    • 56
    • 62

    Mostly Cloudy

    • 59
    • 68

    Partly Sunny

    • 55
    • 68

    Mostly Cloudy

Today 27 Sep Barnstable

Showers likely with isolated Thunderstorms. Highs in the upper 60s. East Winds 15 to 20 Mph with Gusts up to 40 Mph. Chance of rain 70 percent.

Tonight 27 Sep Barnstable

Showers likely with isolated Thunderstorms in the Evening, then Showers likely after midnight. Lows in the upper 50s. East Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 70 percent.

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  • Temperature Real-Time

Pleasant Bay - Sipson Island Temperature Statistics

September Temperature

Chatham, Chatham Municipal Airport (3.7 miles)

  • Lowest 15 September, 2026

    51.1 °F

  • Average September

    64.7 °F

  • Highest 10 September, 2026

    80.1 °F

Climate (2021–2026)

Chatham, Chatham Municipal Airport (3.7 miles)

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  • Average Low 2021–2026

    47.3 °F

  • Average 2021–2026

    53.6 °F

  • Average High 2021–2026

    59.7 °F
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