Hazardous Weather Conditions
Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Mostly Cloudy
30°F
-1°C
| Humidity | 41% |
| Wind Speed | NW 18 G 26 mph |
| Barometer | 29.85 in (1010.9 mb) |
| Dewpoint | 9°F (-13°C) |
| Visibility | 10.00 mi |
| Wind Chill | 18°F (-8°C) |
| Last update | 24 Feb 2:56 pm EST |
Extended Forecast for
Port Jefferson NY
Tonight
Low: 20 °F⇑
Mostly Clear
then Snow
LikelyWednesday
High: 39 °F
Rain/Snow
then Chance
Rain/SnowWednesday Night
Low: 29 °F
Partly Cloudy
Thursday
High: 36 °F
Mostly Sunny
then Chance
SnowThursday Night
Low: 25 °F
Chance Snow
Friday
High: 36 °F
Mostly Sunny
Friday Night
Low: 27 °F
Partly Cloudy
Saturday
High: 42 °F
Mostly Sunny
Saturday Night
Low: 29 °F
Partly Cloudy
Detailed Forecast
Tonight
Snow likely after 4am. Increasing clouds, with a temperature falling to near 20 by 11pm, then rising to around 31 during the remainder of the night. West wind 5 to 11 mph becoming south in the evening. Chance of precipitation is 60%. Total nighttime snow accumulation of less than one inch possible.
Wednesday
Snow, possibly mixed with rain, mainly before 10am. High near 39. Wind chill values between 25 and 35. Southwest wind 9 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.
Wednesday Night
Partly cloudy, with a low around 29. West wind around 7 mph.
Thursday
A 30 percent chance of snow, mainly after 4pm. Partly sunny, with a high near 36. Wind chill values between 25 and 30. West wind around 6 mph.
Thursday Night
A 40 percent chance of snow, mainly before 4am. Mostly cloudy, with a low around 25. Light and variable wind becoming north around 5 mph after midnight.
Friday
Mostly sunny, with a high near 36.
Friday Night
Partly cloudy, with a low around 27.
Saturday
Mostly sunny, with a high near 42.
Saturday Night
Partly cloudy, with a low around 29.
Sunday
Partly sunny, with a high near 39.
Sunday Night
Partly cloudy, with a low around 20.
Monday
A 40 percent chance of snow. Partly sunny, with a high near 29.
Monday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 21.
Tuesday
A chance of rain and snow. Partly sunny, with a high near 35. Chance of precipitation is 30%.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Port Jefferson NY
40.93°N 73.06°W (Elev. 161 ft)
40.93°N 73.06°W (Elev. 161 ft)
1:21 pm EST Feb 24, 2026
3pm EST Feb 24, 2026-6pm EST Mar 3, 2026
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