Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Light Snow
29°F
-2°C
| Humidity | 54% |
| Wind Speed | NW 14 G 21 mph |
| Barometer | 29.77 in (1008.0 mb) |
| Dewpoint | 14°F (-10°C) |
| Visibility | 8.00 mi |
| Wind Chill | 18°F (-8°C) |
| Last update | 2 Jan 5:56 pm EST |
Extended Forecast for
Port Jefferson Station NY
Tonight

Low: 18 °F
Scattered
FlurriesSaturday

High: 30 °F
Increasing
CloudsSaturday Night
Low: 21 °F
Slight Chance
Snow Showers
then Chance
Light SnowSunday
High: 33 °F
Slight Chance
Light Snow
then Partly
SunnySunday Night

Low: 16 °F
Partly Cloudy
Monday

High: 31 °F
Increasing
CloudsMonday Night

Low: 23 °F
Cloudy
Tuesday

High: 41 °F
Mostly Cloudy
Tuesday Night

Low: 32 °F
Mostly Cloudy
Detailed Forecast
Tonight
Scattered flurries before 7pm. Partly cloudy, with a low around 18. Wind chill values between 10 and 15. West wind 9 to 13 mph.
Saturday
Increasing clouds, with a high near 30. Wind chill values between 10 and 20. West wind 8 to 11 mph.
Saturday Night
A slight chance of snow showers between 10pm and 1am, then a chance of light snow after 1am. Cloudy, with a low around 21. West wind 3 to 5 mph. Chance of precipitation is 50%.
Sunday
A 20 percent chance of light snow before 10am. Partly sunny, with a high near 33. Wind chill values between 20 and 25. Northwest wind 6 to 13 mph.
Sunday Night
Partly cloudy, with a low around 16. Northwest wind 7 to 14 mph.
Monday
Increasing clouds, with a high near 31.
Monday Night
Cloudy, with a low around 23.
Tuesday
Mostly cloudy, with a high near 41.
Tuesday Night
Mostly cloudy, with a low around 32.
Wednesday
Mostly cloudy, with a high near 44.
Wednesday Night
Partly cloudy, with a low around 30.
Thursday
Mostly sunny, with a high near 44.
Thursday Night
Mostly cloudy, with a low around 34.
Friday
A 30 percent chance of rain. Mostly cloudy, with a high near 47.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Port Jefferson Station NY
40.93°N 73.06°W (Elev. 161 ft)
40.93°N 73.06°W (Elev. 161 ft)
3:52 pm EST Jan 2, 2026
6pm EST Jan 2, 2026-6pm EST Jan 9, 2026


