Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Overcast
69°F
21°C
| Humidity | 70% |
| Wind Speed | NE 12 mph |
| Barometer | 30.14 in (1020.6 mb) |
| Dewpoint | 59°F (15°C) |
| Visibility | 10.00 mi |
| Last update | 18 Aug 10:56 am EDT |
Extended Forecast for
Port Jefferson NY
Today
High: 76 °F
Decreasing
CloudsTonight
Low: 59 °F
Mostly Clear
Tuesday
High: 76 °F
Sunny
Tuesday Night
Low: 61 °F
Partly Cloudy
Wednesday
High: 78 °F
Mostly Sunny
Wednesday Night
Low: 63 °F
Partly Cloudy
Thursday
High: 81 °F
Mostly Sunny
Thursday Night
Low: 63 °F
Partly Cloudy
Friday
High: 82 °F
Sunny
Detailed Forecast
Today
Mostly cloudy, then gradually becoming sunny, with a high near 76. East wind 14 to 17 mph.
Tonight
Mostly clear, with a low around 59. East wind around 9 mph.
Tuesday
Sunny, with a high near 76. East wind 9 to 11 mph, with gusts as high as 21 mph.
Tuesday Night
Partly cloudy, with a low around 61. East wind 5 to 7 mph.
Wednesday
Mostly sunny, with a high near 78. East wind 8 to 13 mph.
Wednesday Night
Partly cloudy, with a low around 63.
Thursday
Mostly sunny, with a high near 81.
Thursday Night
Partly cloudy, with a low around 63.
Friday
Sunny, with a high near 82.
Friday Night
Mostly clear, with a low around 65.
Saturday
Sunny, with a high near 82.
Saturday Night
Partly cloudy, with a low around 68.
Sunday
A 40 percent chance of showers. Partly sunny, with a high near 83.
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)
2:28 am EDT Aug 18, 2025
11am EDT Aug 18, 2025-6pm EDT Aug 24, 2025
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