Hazardous Weather Conditions
Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Fog and Breezy
54°F
12°C
| Humidity | 97% |
| Wind Speed | S 22 G 36 mph |
| Barometer | 29.76 in (1007.8 mb) |
| Dewpoint | 53°F (12°C) |
| Visibility | 0.13 mi |
| Wind Chill | 49°F (9°C) |
| Last update | 16 Mar 10:56 am EDT |
Extended Forecast for
Port Jefferson NY
Wind Advisory March 16, 02:00pm until March 17, 04:00am
Today

High: 56 °F
Showers and
Areas FogTonight

Low: 36 °F
Showers and
Areas FogTuesday

High: 40 °F
Mostly Sunny
and BreezyTuesday Night

Low: 28 °F
Partly Cloudy
and BreezyWednesday

High: 36 °F
Mostly Sunny
Wednesday Night

Low: 31 °F
Mostly Cloudy
Thursday

High: 42 °F
Mostly Sunny
Thursday Night

Low: 37 °F
Mostly Cloudy
Friday

High: 48 °F
Mostly Sunny
Detailed Forecast
Today
Showers and possibly a thunderstorm. Areas of fog. High near 56. Windy, with a south wind 25 to 29 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
Showers and possibly a thunderstorm before 2am, then a chance of showers. Areas of fog before 2am. Low around 36. Very windy, with a south wind 32 to 41 mph becoming west after midnight. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
Mostly sunny, with a high near 40. Wind chill values between 25 and 30. Breezy, with a west wind 22 to 24 mph.
Tuesday Night
Partly cloudy, with a low around 28. Wind chill values between 15 and 20. Breezy, with a west wind 17 to 21 mph.
Wednesday
Mostly sunny, with a high near 36. Northwest wind 6 to 11 mph becoming southwest in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 31.
Thursday
Mostly sunny, with a high near 42.
Thursday Night
Mostly cloudy, with a low around 37.
Friday
Mostly sunny, with a high near 48.
Friday Night
Mostly cloudy, with a low around 36.
Saturday
A chance of rain and snow. Mostly cloudy, with a high near 45. Chance of precipitation is 40%.
Saturday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 36.
Sunday
A 30 percent chance of rain. Partly sunny, with a high near 43.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Port Jefferson NY
40.96°N 73.08°W (Elev. 3 ft)
40.96°N 73.08°W (Elev. 3 ft)
11:41 am EDT Mar 16, 2026
11am EDT Mar 16, 2026-6pm EDT Mar 22, 2026



