Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
A Few Clouds
71°F
22°C
| Humidity | 46% |
| Wind Speed | N 20 G 33 mph |
| Barometer | 30.03 in (1017.0 mb) |
| Dewpoint | 49°F (9°C) |
| Visibility | 10.00 mi |
| Last update | 14 Sep 10:56 am EDT |
Extended Forecast for
Port Jefferson NY
Today
High: 76 °F
Sunny
Tonight
Low: 58 °F
Clear
Tuesday
High: 71 °F
Sunny
Tuesday Night
Low: 58 °F
Mostly Clear
Wednesday
High: 75 °F
Sunny
Wednesday Night
Low: 65 °F
Partly Cloudy
Thursday
High: 78 °F
Mostly Sunny
Thursday Night
Low: 68 °F
Partly Cloudy
Friday
High: 78 °F
Mostly Sunny
Detailed Forecast
Today
Sunny, with a high near 76. North wind around 16 mph, with gusts as high as 28 mph.
Tonight
Clear, with a low around 58. Northeast wind 11 to 13 mph.
Tuesday
Sunny, with a high near 71. East wind 5 to 10 mph.
Tuesday Night
Mostly clear, with a low around 58. South wind 3 to 6 mph.
Wednesday
Sunny, with a high near 75. Southwest wind 3 to 6 mph.
Wednesday Night
Partly cloudy, with a low around 65.
Thursday
Mostly sunny, with a high near 78.
Thursday Night
Partly cloudy, with a low around 68.
Friday
Mostly sunny, with a high near 78.
Friday Night
Partly cloudy, with a low around 64.
Saturday
Mostly sunny, with a high near 74.
Saturday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 64.
Sunday
A 30 percent chance of showers. Partly sunny, with a high near 73.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Port Jefferson NY
40.95°N 73.05°W (Elev. 151 ft)
40.95°N 73.05°W (Elev. 151 ft)
5:27 am EDT Sep 14, 2026
11am EDT Sep 14, 2026-6pm EDT Sep 20, 2026
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