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Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Partly Cloudy
75°F
24°C
| Humidity | 54% |
| Wind Speed | SE 10 mph |
| Barometer | 29.95 in (1014.3 mb) |
| Dewpoint | 57°F (14°C) |
| Visibility | 10.00 mi |
| Last update | 3 Sep 12:56 pm EDT |
Extended Forecast for
Port Jefferson NY
This Afternoon
High: 74 °F
Sunny
Tonight
Low: 63 °F
Mostly Clear
Thursday
High: 76 °F
Sunny
Thursday Night
Low: 69 °F
Chance
ShowersFriday
High: 79 °F
Sunny
Friday Night
Low: 72 °F
Partly Cloudy
Saturday
High: 80 °F
Mostly Sunny
then Chance
ShowersSaturday Night
Low: 64 °F
Showers
LikelySunday
High: 72 °F
Chance
Showers
Detailed Forecast
This Afternoon
Sunny, with a high near 74. East wind around 6 mph.
Tonight
Mostly clear, with a low around 63. South wind 3 to 7 mph.
Thursday
Sunny, with a high near 76. South wind 5 to 13 mph.
Thursday Night
A 40 percent chance of showers. Increasing clouds, with a low around 69. South wind 13 to 15 mph.
Friday
Sunny, with a high near 79. South wind 10 to 15 mph.
Friday Night
Partly cloudy, with a low around 72.
Saturday
A 40 percent chance of showers after 2pm. Mostly sunny, with a high near 80.
Saturday Night
Showers likely, mainly between 8pm and 2am. Mostly cloudy, with a low around 64. Chance of precipitation is 60%.
Sunday
A 30 percent chance of showers before 2pm. Partly sunny, with a high near 72.
Sunday Night
Partly cloudy, with a low around 61.
Monday
Sunny, with a high near 73.
Monday Night
Partly cloudy, with a low around 62.
Tuesday
Mostly sunny, with a high near 71.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Port Jefferson NY
40.96°N 73.08°W (Elev. 3 ft)
40.96°N 73.08°W (Elev. 3 ft)
7:34 am EDT Sep 3, 2025
1pm EDT Sep 3, 2025-6pm EDT Sep 9, 2025
Additional Resources
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