Mastic Beach Weather Forecast

    • 38
    • 54

    Rain Showers

    • 33
    • 51

    Chance Rain Showers

    • 39
    • 50

    Partly Sunny

    • 43
    • 56

    Partly Sunny

    • 44
    • 61

    Partly Sunny

    • 44
    • 57

    Partly Sunny

Today 19 Apr Southeast Suffolk

Patchy fog this morning. A chance of Showers this Morning, then Showers this afternoon. Highs in the lower 50s. South Winds 10 to 15 Mph, becoming northwest 15 to 20 Mph this afternoon. Gusts up to 30 Mph. Chance of rain 90 percent.

Tonight 19 Apr Southeast Suffolk

Partly cloudy with rain Showers likely in the Evening, then clear after midnight. Lows in the upper 30s. West Winds 10 to 15 Mph. Gusts up to 25 Mph in the evening. Chance of rain 70 percent.

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Mastic Beach Temperature Statistics

April Temperature

Shirley, Brookhaven Airport (3.7 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 (3.7 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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