Mastic Beach Weather Forecast

    • 59
    • 83

    Increasing Clouds

    • 56
    • 75

    Mostly Sunny

    • 61
    • 77

    Mostly Sunny

    • 64
    • 79

    Chance Rain Showers

    • 67
    • 81

    Slight Chance Thunderstorms

    • 65
    • 83

    Slight Chance Thunderstorms

Today 7 Jun Southeast Suffolk

Sunny. Highs around 80. West Winds 10 to 15 Mph.

Tonight 7 Jun Southeast Suffolk

Partly cloudy. Lows in the upper 50s. North Winds 5 to 10 Mph. Gusts up to 20 Mph after midnight.

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Mastic Beach Temperature Statistics

June Temperature

Shirley, Brookhaven Airport (3.7 miles)

  • Lowest 2 June, 2026

    43 °F

  • Average June

    63.3 °F

  • Highest 5 June, 2026

    81 °F

Climate (2021–Present)

Shirley, Brookhaven Airport (3.7 miles)

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  • Average Low 2021–2026

    46.1 °F

  • Average 2021–2026

    54.5 °F

  • Average High 2021–2026

    62.5 °F
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