Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Fair
53°F
12°C
| Humidity | 51% |
| Wind Speed | NW 10 mph |
| Barometer | 30.07 in (1018.3 mb) |
| Dewpoint | 35°F (2°C) |
| Visibility | 10.00 mi |
| Wind Chill | 50°F (10°C) |
| Last update | 6 Oct 2:56 am EDT |
Extended Forecast for
Port Jefferson NY
Overnight
Low: 47 °F
Clear
Tuesday
High: 63 °F
Sunny
Tuesday Night
Low: 44 °F
Mostly Clear
Wednesday
High: 66 °F
Sunny
Wednesday Night
Low: 60 °F
Mostly Clear
Thursday
High: 72 °F
Sunny
Thursday Night
Low: 59 °F
Mostly Clear
Friday
High: 68 °F
Sunny
Friday Night
Low: 56 °F
Mostly Clear
Detailed Forecast
Overnight
Clear, with a low around 47. Northwest wind around 16 mph.
Tuesday
Sunny, with a high near 63. Northwest wind 11 to 14 mph.
Tuesday Night
Mostly clear, with a low around 44. Northwest wind 5 to 7 mph becoming calm after midnight.
Wednesday
Sunny, with a high near 66. Light southwest wind increasing to 8 to 13 mph in the morning.
Wednesday Night
Mostly clear, with a low around 60. Southwest wind around 14 mph.
Thursday
Sunny, with a high near 72.
Thursday Night
Mostly clear, with a low around 59.
Friday
Sunny, with a high near 68.
Friday Night
Mostly clear, with a low around 56.
Saturday
Sunny, with a high near 66.
Saturday Night
Partly cloudy, with a low around 57.
Sunday
Mostly sunny, with a high near 67.
Sunday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 60.
Columbus Day
A 40 percent chance of showers. Mostly cloudy, with a high near 68.
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)
3:07 am EDT Oct 6, 2026
3am EDT Oct 6, 2026-6pm EDT Oct 12, 2026
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