Bellport Bay - John Boyle Island Weather Forecast

    • 30
    • 51

    Decreasing Clouds

    • 37
    • 49

    Increasing Clouds

    • 44
    • 53

    Chance Rain Showers

    • 46
    • 60

    Mostly Cloudy

    • 45
    • 53

    Chance Rain Showers

    • 45
    • 49

    Chance Rain Showers

    • 45
    • 51

    Chance Rain Showers

Today 20 Apr Southwest Suffolk

Partly sunny with scattered Showers. Near steady temperature in the lower 50s. Northwest Winds 10 to 15 Mph. Chance of rain 40 percent.

Tonight 20 Apr Southwest Suffolk

Partly cloudy this Evening, then clearing. Lows in the lower 30s. North Winds 10 to 15 Mph with Gusts up to 25 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Bellport Bay - John Boyle Island Temperature Statistics

April Temperature

Shirley, Brookhaven Airport (5.6 miles)

  • Lowest 9 April, 2026

    24.1 °F

  • Average April

    50.6 °F

  • Highest 16 April, 2026

    81 °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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