Bellport Bay - John Boyle Island Weather Forecast

    • 42
    • 44

    Increasing Clouds

    • 46
    • 50

    Mostly Cloudy

    • 48
    • 54

    Slight Chance Rain

    • 40
    • 55

    Rain Likely

    • 37
    • 43

    Rain/Snow Likely

    • 39
    • 43

    Rain Likely

Today 29 Mar Southwest Suffolk

Sunny. Highs in the upper 40s. Southwest Winds 5 to 10 Mph, increasing to 15 to 20 Mph with Gusts up to 30 Mph in the afternoon.

Tonight 29 Mar Southwest Suffolk

Partly cloudy in the Evening, then becoming mostly cloudy. Lows around 40. Southwest Winds 15 to 20 Mph with Gusts up to 30 Mph.

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  • Temperature Forecast NOAA

  • 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

    40.5 °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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