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Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
A Few Clouds
38°F
3°C
| Humidity | 89% |
| Wind Speed | Calm |
| Barometer | 30.26 in (1024.8 mb) |
| Dewpoint | 35°F (2°C) |
| Visibility | 10.00 mi |
| Last update | 2 Nov 6:56 am EST |
Extended Forecast for
Port Jefferson NY
Today
High: 56 °F
Sunny
Tonight
Low: 46 °F
Mostly Clear
Monday
High: 61 °F
Partly Sunny
then Chance
RainMonday Night
Low: 47 °F
Chance Rain
Tuesday
High: 59 °F
Sunny
Tuesday Night
Low: 45 °F
Mostly Clear
Wednesday
High: 61 °F
Partly Sunny
Wednesday Night
Low: 44 °F
Chance Rain
Thursday
High: 55 °F
Mostly Sunny
Detailed Forecast
Today
Sunny, with a high near 56. Northwest wind 5 to 7 mph becoming southwest in the afternoon.
Tonight
Mostly clear, with a low around 46. Southwest wind 3 to 5 mph.
Monday
A 40 percent chance of rain after 1pm. Partly sunny, with a high near 61. South wind 5 to 13 mph.
Monday Night
A 30 percent chance of rain before 1am. Mostly cloudy, then gradually becoming clear, with a low around 47. Southwest wind 11 to 15 mph becoming northwest after midnight.
Tuesday
Sunny, with a high near 59. West wind 14 to 16 mph.
Tuesday Night
Mostly clear, with a low around 45.
Wednesday
Partly sunny, with a high near 61.
Wednesday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 44.
Thursday
Mostly sunny, with a high near 55.
Thursday Night
Mostly clear, with a low around 40.
Friday
Partly sunny, with a high near 60.
Friday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 49.
Saturday
A 40 percent chance of rain. Mostly sunny, with a high near 60.
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)
4:17 am EST Nov 2, 2025
7am EST Nov 2, 2025-6pm EST Nov 8, 2025
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