Dennis Port Weather Forecast

    • 49
    • 56

    Patchy Fog

    • 56
    • 65

    Rain Showers

    • 55
    • 76

    Rain Showers

    • 55
    • 67

    Mostly Sunny

    • 58
    • 70

    Partly Sunny

    • 56
    • 70

    Chance Rain Showers

Today 15 May Barnstable

Cloudy. Isolated Showers. Near steady temperature in the mid 50s. North Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 15 May Barnstable

Mostly cloudy. Patchy fog. Near steady temperature around 50. North Winds 5 to 10 Mph, becoming west after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Dennis Port Temperature Statistics

May Temperature

Chatham, Chatham Municipal Airport (6.8 miles)

  • Lowest 8 May, 2026

    42.1 °F

  • Average May

    52.5 °F

  • Highest 6 May, 2026

    63 °F

Climate (2021–Present)

Chatham, Chatham Municipal Airport (6.8 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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