Bellport Bay - John Boyle Island Weather Forecast

    • 35
    • 37

    Partly Sunny

    • 41
    • 45

    Rain Likely

    • 39
    • 49

    Partly Sunny

    • 39
    • 48

    Rain Likely

    • 31
    • 47

    Mostly Sunny

    • 35
    • 40

    Mostly Cloudy

    • 34
    • 43

    Mostly Cloudy

Today 19 Mar Southwest Suffolk

Partly sunny. Near steady temperature around 40. South Winds 5 to 10 Mph.

Tonight 19 Mar Southwest Suffolk

Partly cloudy this Evening, then becoming mostly cloudy. Lows in the mid 30s. Southwest Winds 5 to 10 Mph.

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  • Temperature Real-Time

Bellport Bay - John Boyle Island Temperature Statistics

March Temperature

Shirley, Brookhaven Airport (5.6 miles)

  • Lowest 3 March, 2026

    14 °F

  • Average March

    40.4 °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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