Hazardous Weather Conditions
Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Fog
53°F
12°C
| Humidity | 100% |
| Wind Speed | S 16 G 31 mph |
| Barometer | 29.70 in (1005.9 mb) |
| Dewpoint | 53°F (12°C) |
| Visibility | 0.13 mi |
| Wind Chill | 48°F (9°C) |
| Last update | 16 Mar 12:56 pm EDT |
Extended Forecast for
Port Jefferson NY
Wind Advisory March 16, 02:00pm until March 17, 04:00am
This Afternoon
High: 58 °F
Showers and
Areas FogTonight
Low: 35 °F
Showers and
Areas FogTuesday
High: 38 °F
Mostly Sunny
Tuesday Night
Low: 25 °F
Partly Cloudy
Wednesday
High: 38 °F
Mostly Sunny
Wednesday Night
Low: 29 °F
Mostly Cloudy
Thursday
High: 43 °F
Mostly Sunny
Thursday Night
Low: 34 °F
Mostly Cloudy
Friday
High: 50 °F
Mostly Sunny
Detailed Forecast
This Afternoon
Showers and possibly a thunderstorm. Areas of fog. High near 58. Breezy, with a south wind 18 to 21 mph, with gusts as high as 36 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 35. Breezy, with a south wind 18 to 24 mph becoming west after midnight. Winds could gust as high as 47 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
Mostly sunny, with a steady temperature around 38. West wind around 15 mph, with gusts as high as 25 mph.
Tuesday Night
Partly cloudy, with a low around 25. Wind chill values between 15 and 20. West wind 9 to 11 mph, with gusts as high as 21 mph.
Wednesday
Mostly sunny, with a high near 38. Northwest wind around 7 mph.
Wednesday Night
Mostly cloudy, with a low around 29.
Thursday
Mostly sunny, with a high near 43.
Thursday Night
Mostly cloudy, with a low around 34.
Friday
Mostly sunny, with a high near 50.
Friday Night
Mostly cloudy, with a low around 34.
Saturday
A chance of rain and snow. Mostly cloudy, with a high near 47. Chance of precipitation is 40%.
Saturday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 34.
Sunday
A 30 percent chance of rain. Partly sunny, with a high near 44.
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)
11:41 am EDT Mar 16, 2026
1pm EDT Mar 16, 2026-6pm EDT Mar 22, 2026
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