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Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Mostly Cloudy
50°F
10°C
| Humidity | 61% |
| Wind Speed | N 18 mph |
| Barometer | 29.92 in (1013.2 mb) |
| Dewpoint | 37°F (3°C) |
| Visibility | 10.00 mi |
| Wind Chill | 44°F (7°C) |
| Last update | 16 Oct 7:56 am EDT |
Extended Forecast for
Port Jefferson NY
Today
High: 57 °F
Sunny
Tonight
Low: 45 °F
Clear
Friday
High: 61 °F
Sunny
Friday Night
Low: 45 °F
Mostly Clear
Saturday
High: 63 °F
Sunny
Saturday Night
Low: 52 °F
Partly Cloudy
Sunday
High: 69 °F
Mostly Sunny
Sunday Night
Low: 54 °F
Showers
LikelyMonday
High: 65 °F
Chance
Showers
Detailed Forecast
Today
Sunny, with a high near 57. North wind 14 to 17 mph, with gusts as high as 28 mph.
Tonight
Clear, with a low around 45. North wind 14 to 16 mph.
Friday
Sunny, with a high near 61. North wind 10 to 13 mph.
Friday Night
Mostly clear, with a low around 45. North wind 6 to 10 mph.
Saturday
Sunny, with a high near 63. North wind around 6 mph becoming west in the afternoon.
Saturday Night
Partly cloudy, with a low around 52.
Sunday
Mostly sunny, with a high near 69.
Sunday Night
Showers likely after 8pm. Mostly cloudy, with a low around 54. Chance of precipitation is 70%.
Monday
A 50 percent chance of showers. Partly sunny, with a high near 65.
Monday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 50.
Tuesday
Mostly sunny, with a high near 66.
Tuesday Night
A 30 percent chance of showers. Partly cloudy, with a low around 53.
Wednesday
A 30 percent chance of showers. Partly sunny, with a high near 66.
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)
1:38 am EDT Oct 16, 2025
8am EDT Oct 16, 2025-6pm EDT Oct 22, 2025
Additional Resources
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Hourly Weather Forecast
