Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
A Few Clouds
82°F
28°C
| Humidity | 31% |
| Wind Speed | N 8 mph |
| Barometer | 30.17 in (1021.5 mb) |
| Dewpoint | 48°F (9°C) |
| Visibility | 10.00 mi |
| Heat Index | 81°F (27°C) |
| Last update | 3 Aug 11:56 am EDT |
Extended Forecast for
Port Jefferson NYSimilar City Names
This Afternoon
High: 83 °F
Sunny
Tonight
Low: 65 °F
Mostly Clear
Monday
High: 87 °F
Sunny
Monday Night
Low: 68 °F
Mostly Clear
Tuesday
High: 85 °F
Mostly Sunny
Tuesday Night
Low: 69 °F
Mostly Cloudy
Wednesday
High: 82 °F
Partly Sunny
Wednesday Night
Low: 68 °F
Mostly Cloudy
Thursday
High: 81 °F
Mostly Sunny
Detailed Forecast
This Afternoon
Sunny, with a high near 83. East wind around 5 mph.
Tonight
Mostly clear, with a low around 65. South wind 5 to 7 mph becoming calm after midnight.
Monday
Sunny, with a high near 87. Light and variable wind.
Monday Night
Mostly clear, with a low around 68. South wind around 6 mph becoming calm after midnight.
Tuesday
Mostly sunny, with a high near 85. Northeast wind around 7 mph.
Tuesday Night
Mostly cloudy, with a low around 69.
Wednesday
Partly sunny, with a high near 82.
Wednesday Night
Mostly cloudy, with a low around 68.
Thursday
Mostly sunny, with a high near 81.
Thursday Night
Partly cloudy, with a low around 66.
Friday
Mostly sunny, with a high near 81.
Friday Night
Partly cloudy, with a low around 67.
Saturday
Sunny, with a high near 84.
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)
9:48 am EDT Aug 3, 2025
12pm EDT Aug 3, 2025-6pm EDT Aug 9, 2025
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