Sumac Island Weather Forecast

    • 35
    • 53

    Becoming Sunny

    • 41
    • 56

    Mostly Sunny

    • 45
    • 60

    Mostly Cloudy

    • 48
    • 65

    Partly Sunny

    • 46
    • 62

    Slight Chance Rain Showers

    • 46
    • 60

    Slight Chance Rain Showers

Today 17 Oct Southern New Haven

Cloudy with a chance of Showers this Morning, then partly sunny this afternoon. Cooler with Highs in the lower 50s. North Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 50 percent.

Tonight 17 Oct Southern New Haven

Mostly clear. Lows in the mid 30s. North Winds 10 to 15 Mph with Gusts up to 25 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sumac Island Temperature Statistics

October Temperature

New Haven, Tweed-New Haven Airport (3.7 miles)

  • Lowest 7 October, 2026

    37 °F

  • Average October

    60.1 °F

  • Highest 2 October, 2026

    77 °F

Climate (2021–2026)

New Haven, Tweed-New Haven Airport (3.7 miles)

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  • Average Low 2021–2026

    47.1 °F

  • Average 2021–2026

    55.4 °F

  • Average High 2021–2026

    63.2 °F
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