Hazardous Weather Conditions
Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Mostly Cloudy
36°F
2°C
| Humidity | 64% |
| Wind Speed | NE 12 mph |
| Barometer | 30.10 in (1019.2 mb) |
| Dewpoint | 25°F (-4°C) |
| Visibility | 10.00 mi |
| Wind Chill | 28°F (-2°C) |
| Last update | 15 Feb 9:56 am EST |
Extended Forecast for
Port Jefferson NY
Today
High: 36 °F
Mostly Cloudy
Tonight
Low: 28 °F
Chance Snow
then Snow
LikelyWashington's Birthday
High: 36 °F
Decreasing
CloudsMonday Night
Low: 28 °F
Mostly Cloudy
then Slight
Chance
Rain/SnowTuesday
High: 40 °F
Gradual
ClearingTuesday Night
Low: 31 °F
Increasing
CloudsWednesday
High: 39 °F
Mostly Cloudy
then Rain
LikelyWednesday Night
Low: 31 °F
Rain Likely
Thursday
High: 40 °F
Mostly Cloudy
Detailed Forecast
Today
Mostly cloudy, with a high near 36. Northeast wind 3 to 6 mph.
Tonight
Snow likely, mainly after 1am. Cloudy, with a low around 28. East wind 5 to 7 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.
Washington's Birthday
Cloudy, then gradually becoming mostly sunny, with a high near 36. Wind chill values between 20 and 30. Northeast wind 5 to 9 mph.
Monday Night
A slight chance of rain and snow showers after 1am. Mostly cloudy, with a low around 28. Calm wind. Chance of precipitation is 20%.
Tuesday
Cloudy through mid morning, then gradual clearing, with a high near 40. Calm wind becoming southwest 5 to 7 mph in the morning.
Tuesday Night
Increasing clouds, with a low around 31.
Wednesday
Rain likely after 1pm. Cloudy, with a high near 39. Chance of precipitation is 60%.
Wednesday Night
Rain likely, mainly before 1am. Cloudy, with a low around 31. Chance of precipitation is 70%.
Thursday
Mostly cloudy, with a high near 40.
Thursday Night
A 30 percent chance of rain after 1am. Mostly cloudy, with a low around 30.
Friday
Rain likely. Mostly cloudy, with a high near 42. Chance of precipitation is 60%.
Friday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 31.
Saturday
A chance of rain and snow. Mostly cloudy, with a high near 40. Chance of precipitation is 40%.
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)
1:46 am EST Feb 15, 2026
10am EST Feb 15, 2026-6pm EST Feb 21, 2026
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