Mount Sinai Harbor Weather Forecast

    • 62
    • 81

    Mostly Sunny

    • 66
    • 79

    Partly Sunny

    • 67
    • 78

    Rain Showers Likely

    • 67
    • 74

    Chance Rain Showers

    • 68
    • 79

    Partly Sunny

    • 69
    • 80

    Partly Sunny

Today 24 Jun Northwest Suffolk

Sunny. Highs in the lower 80s. Northwest Winds around 10 Mph. Gusts up to 20 Mph this morning.

Tonight 24 Jun Northwest Suffolk

Mostly clear. Lows in the lower 60s. Northwest Winds 5 to 10 Mph.

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Mount Sinai Harbor Temperature Statistics

June Temperature

Islip, Long Island Mac Arthur Airport (11.8 miles)

  • Lowest 2 June, 2026

    46.7 °F

  • Average June

    71.4 °F

  • Highest 12 June, 2026

    94.6 °F

Climate (2021–2026)

Islip, Long Island Mac Arthur Airport (11.8 miles)

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  • Average Low 2021–2026

    47.3 °F

  • Average 2021–2026

    55.2 °F

  • Average High 2021–2026

    63 °F
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