Islandia Weather Forecast

    • 72
    • 84

    Partly Sunny

    • 74
    • 87

    Mostly Sunny

    • 74
    • 90

    Slight Chance Thunderstorms

    • 71
    • 88

    Chance Thunderstorms

    • 71
    • 83

    Chance Rain Showers

    • 72
    • 86

    Slight Chance Rain Showers

Today 23 Jul Southwest Suffolk

Mostly sunny. Highs in the lower 80s. Southeast Winds 5 to 10 Mph.

Tonight 23 Jul Southwest Suffolk

Partly cloudy. Lows in the lower 70s. Southwest Winds 5 to 10 Mph.

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Islandia Temperature Statistics

July Temperature

Islip, Long Island Mac Arthur Airport (3.1 miles)

  • Lowest 5 July, 2025

    64.7 °F

  • Average July

    78.3 °F

  • Highest 8 July, 2025

    92.6 °F

Climate (2020–Present)

Islip, Long Island Mac Arthur Airport (3.1 miles)

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  • Average Low 2020–2025

    47.5 °F

  • Average 2020–2025

    55.2 °F

  • Average High 2020–2025

    63 °F
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