Bellport Bay - John Boyle Island Weather Forecast

    • 41
    • 50

    Rain Showers

    • 40
    • 45

    Rain

    • 28
    • 44

    Chance Rain

    • 32
    • 39

    Partly Sunny

    • 35
    • 42

    Mostly Cloudy

    • 32
    • 44

    Chance Rain Showers

Today 9 Jan Southwest Suffolk

Partly sunny late this Morning, then mostly cloudy with isolated Showers this afternoon. Highs in the lower 50s. South Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 20 percent.

Tonight 9 Jan Southwest Suffolk

Cloudy. Numerous Showers in the evening. Lows in the lower 40s. Southwest Winds 10 to 15 Mph, becoming west after midnight. Gusts up to 30 Mph. Chance of rain 70 percent.

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Bellport Bay - John Boyle Island Temperature Statistics

January Temperature

Shirley, Brookhaven Airport (5.6 miles)

  • Lowest 5 January, 2026

    14 °F

  • Average January

    29.5 °F

  • Highest 7 January, 2026

    48 °F

Climate (2021–Present)

Shirley, Brookhaven Airport (5.6 miles)

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  • Average Low 2021–2026

    46.4 °F

  • Average 2021–2026

    54.7 °F

  • Average High 2021–2026

    62.8 °F
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