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Transitioning to a New Format for the Area Forecast Discussion on January 7, 2026

Hazardous Weather Conditions

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Light Snow Fog/Mist and Windy

30°F

-1°C

Humidity	88%
Wind Speed	NW 31 G 48 mph
Barometer	29.55 in (1000.5 mb)
Dewpoint	27°F (-3°C)
Visibility	0.50 mi
Wind Chill	15°F (-9°C)
Last update	1 Jan 6:56 am EST

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Islip, Long Island Mac Arthur Airport NY

Snow Squall Warning until January 1, 08:15am

Click here for hazard details and duration

...

Snow Squall Warning until January 1, 08:15am
NOW until 8:15am Thu
Snow Squall Warning
New Year's Day
High: 27 °F
Blustery.
Chance Snow
then Mostly
Sunny
Tonight
Low: 18 °F
Increasing
Clouds
Friday
High: 32 °F
Partly Sunny
Friday Night
Low: 21 °F
Partly Cloudy
Saturday
High: 34 °F
Increasing
Clouds
Saturday Night
Low: 23 °F
Cloudy
Sunday
High: 35 °F
Decreasing
Clouds
Sunday Night
Low: 19 °F
Mostly Clear

Detailed Forecast

New Year's Day

A 40 percent chance of snow before 8am. Mostly cloudy through mid morning, then becoming sunny, with a steady temperature around 27. Wind chill values between 10 and 15. Blustery, with a northwest wind 17 to 22 mph, with gusts as high as 36 mph.

Tonight

Increasing clouds, with a low around 18. Wind chill values between 10 and 15. West wind 10 to 14 mph, with gusts as high as 24 mph.

Friday

Partly sunny, with a high near 32. Wind chill values between 10 and 20. West wind 10 to 15 mph.

Friday Night

Partly cloudy, with a low around 21. Wind chill values between 10 and 15. West wind around 9 mph.

Saturday

Increasing clouds, with a high near 34. West wind 8 to 10 mph.

Saturday Night

Cloudy, with a low around 23.

Sunday

Mostly cloudy, then gradually becoming sunny, with a high near 35.