Hazardous Weather Conditions
Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Overcast
48°F
9°C
| Humidity | 80% |
| Wind Speed | SW 8 mph |
| Barometer | 30.06 in (1018.1 mb) |
| Dewpoint | 42°F (6°C) |
| Visibility | 10.00 mi |
| Wind Chill | 44°F (7°C) |
| Last update | 11 Apr 3:56 am EDT |
Extended Forecast for
Port Jefferson NY
Today
High: 59 °F
Sunny and
BreezyTonight
Low: 38 °F
Clear
Sunday
High: 55 °F
Increasing
CloudsSunday Night
Low: 45 °F
Mostly Cloudy
Monday
High: 64 °F
Partly Sunny
then Slight
Chance
ShowersMonday Night
Low: 54 °F
Decreasing
CloudsTuesday
High: 76 °F
Partly Sunny
Tuesday Night
Low: 57 °F
Mostly Cloudy
Wednesday
High: 80 °F
Partly Sunny
Detailed Forecast
Today
Sunny, with a high near 59. Breezy, with a northwest wind 9 to 14 mph increasing to 15 to 20 mph in the morning.
Tonight
Clear, with a low around 38. North wind 5 to 10 mph.
Sunday
Increasing clouds, with a high near 55. Calm wind becoming south 5 to 7 mph in the afternoon.
Sunday Night
Mostly cloudy, with a low around 45. South wind 6 to 9 mph.
Monday
A 20 percent chance of showers after 2pm. Mostly cloudy, with a high near 64. Southwest wind 10 to 14 mph.
Monday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 54.
Tuesday
Partly sunny, with a high near 76.
Tuesday Night
Mostly cloudy, with a low around 57.
Wednesday
Partly sunny, with a high near 80.
Wednesday Night
Mostly cloudy, with a low around 58.
Thursday
Partly sunny, with a high near 78.
Thursday Night
Mostly cloudy, with a low around 54.
Friday
Mostly cloudy, with a high near 67.
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)
4:11 am EDT Apr 11, 2026
4am EDT Apr 11, 2026-6pm EDT Apr 17, 2026
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