Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Fair
75°F
24°C
| Humidity | 69% |
| Wind Speed | W 6 mph |
| Barometer | 30.15 in (1021.0 mb) |
| Dewpoint | 64°F (18°C) |
| Visibility | 10.00 mi |
| Last update | 4 Aug 8:56 am EDT |
Extended Forecast for
Port Jefferson NYSimilar City Names
Today
High: 87 °F
Haze
Tonight
Low: 67 °F
Haze then
Partly CloudyTuesday
High: 85 °F
Mostly Sunny
Tuesday Night
Low: 68 °F
Mostly Cloudy
Wednesday
High: 82 °F
Partly Sunny
Wednesday Night
Low: 68 °F
Mostly Cloudy
Thursday
High: 80 °F
Mostly Sunny
Thursday Night
Low: 66 °F
Mostly Clear
Friday
High: 81 °F
Sunny
Detailed Forecast
Today
Widespread haze. Sunny, with a high near 87. Light and variable wind.
Tonight
Widespread haze before midnight. Partly cloudy, with a low around 67. South wind 3 to 6 mph.
Tuesday
Mostly sunny, with a high near 85. Northeast wind 5 to 7 mph becoming east in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 68. East wind around 7 mph.
Wednesday
Partly sunny, with a high near 82. Northeast wind around 9 mph.
Wednesday Night
Mostly cloudy, with a low around 68.
Thursday
Mostly sunny, with a high near 80.
Thursday Night
Mostly clear, with a low around 66.
Friday
Sunny, with a high near 81.
Friday Night
Mostly clear, with a low around 66.
Saturday
Sunny, with a high near 83.
Saturday Night
Partly cloudy, with a low around 69.
Sunday
Mostly sunny, with a high near 85.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Port Jefferson NYSimilar City Names
40.95°N 73.05°W (Elev. 151 ft)
40.95°N 73.05°W (Elev. 151 ft)
1:58 am EDT Aug 4, 2025
9am EDT Aug 4, 2025-6pm EDT Aug 10, 2025
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