Bellport Bay - John Boyle Island Weather Forecast

    • 43
    • 51

    Mostly Cloudy

    • 50
    • 66

    Mostly Cloudy

    • 54
    • 71

    Partly Sunny

    • 56
    • 76

    Chance Rain Showers

    • 54
    • 71

    Mostly Cloudy

    • 50
    • 66

    Partly Sunny

Today 12 Apr Southwest Suffolk

Sunny. Highs in the lower 50s. East Winds 5 to 10 Mph, becoming southeast 10 to 15 Mph this afternoon.

Tonight 12 Apr Southwest Suffolk

Mostly cloudy. Lows in the mid 40s. South Winds 10 to 15 Mph. Gusts up to 25 Mph after midnight.

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Bellport Bay - John Boyle Island Temperature Statistics

April Temperature

Shirley, Brookhaven Airport (5.6 miles)

  • Lowest 9 April, 2026

    24.1 °F

  • Average April

    45.3 °F

  • Highest 4 April, 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

    54.5 °F

  • Average High 2021–2026

    62.5 °F
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