Bellport Bay - John Boyle Island Weather Forecast

    • 38
    • 45

    Breezy

    • 32
    • 47

    Breezy

    • 39
    • 46

    Rain

    • 37
    • 54

    Rain

    • 25
    • 44

    Breezy

    • 29
    • 37

    Partly Sunny

Today 13 Mar Southwest Suffolk

Sunny this Morning, then becoming mostly cloudy. Highs in the mid 40s. West Winds 10 to 15 Mph, becoming south 15 to 20 Mph this afternoon. Gusts up to 30 Mph.

Tonight 13 Mar Southwest Suffolk

Mostly cloudy with a slight chance of rain in the Evening, then partly cloudy after midnight. Breezy with Lows in the upper 30s. Southwest Winds 15 to 25 Mph with Gusts up to 35 Mph. Chance of rain 20 percent.

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Bellport Bay - John Boyle Island Temperature Statistics

March Temperature

Shirley, Brookhaven Airport (5.6 miles)

  • Lowest 3 March, 2026

    14 °F

  • Average March

    39.7 °F

  • Highest 9 March, 2026

    66 °F

Climate (2021–Present)

Shirley, Brookhaven Airport (5.6 miles)

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  • Average Low 2021–2026

    46.2 °F

  • Average 2021–2026

    54.6 °F

  • Average High 2021–2026

    62.6 °F
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