Fair Harbor Weather Forecast

    • 37
    • 45

    Partly Sunny

    • 47
    • 53

    Rain

    • 32
    • 54

    Breezy

    • 39
    • 44

    Chance Rain

    • 32
    • 46

    Slight Chance Rain

Today 17 Dec Southwest Suffolk

Mostly sunny. Highs in the mid 40s. Southwest Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 17 Dec Southwest Suffolk

Mostly clear in the Evening, then becoming partly cloudy. Lows in the upper 20s. West Winds 15 to 20 Mph with Gusts up to 30 Mph, becoming northwest 5 to 10 Mph after midnight.

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Fair Harbor Temperature Statistics

December Temperature

Islip, Long Island Mac Arthur Airport (11.2 miles)

  • Lowest 5 December, 2025

    21 °F

  • Average December

    34.7 °F

  • Highest 10 December, 2025

    50 °F

Climate (2020–Present)

Islip, Long Island Mac Arthur Airport (11.2 miles)

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  • Average Low 2020–2025

    47.4 °F

  • Average 2020–2025

    55.2 °F

  • Average High 2020–2025

    63.1 °F
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