Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Fair
48°F
9°C
| Humidity | 89% |
| Wind Speed | N 7 mph |
| Barometer | 30.19 in (1022.3 mb) |
| Dewpoint | 45°F (7°C) |
| Visibility | 10.00 mi |
| Wind Chill | 45°F (7°C) |
| Last update | 20 Oct 12:56 am EDT |
Extended Forecast for
Port Jefferson NY
Overnight
Low: 50 °F
Partly Cloudy
Tuesday
High: 65 °F
Mostly Sunny
Tuesday Night
Low: 47 °F
Partly Cloudy
Wednesday
High: 59 °F
Mostly Sunny
Wednesday Night
Low: 45 °F
Partly Cloudy
Thursday
High: 63 °F
Sunny
Thursday Night
Low: 45 °F
Mostly Clear
Friday
High: 56 °F
Sunny
Friday Night
Low: 44 °F
Mostly Clear
Detailed Forecast
Overnight
Partly cloudy, with a low around 50. North wind around 10 mph.
Tuesday
Mostly sunny, with a high near 65. North wind around 14 mph, with gusts as high as 25 mph.
Tuesday Night
Partly cloudy, with a low around 47. Northeast wind 10 to 16 mph.
Wednesday
Mostly sunny, with a high near 59. Northeast wind 13 to 17 mph.
Wednesday Night
Partly cloudy, with a low around 45. North wind 11 to 14 mph.
Thursday
Sunny, with a high near 63.
Thursday Night
Mostly clear, with a low around 45.
Friday
Sunny, with a high near 56.
Friday Night
Mostly clear, with a low around 44.
Saturday
Sunny, with a high near 56.
Saturday Night
Mostly clear, with a low around 47.
Sunday
Sunny, with a high near 61.
Sunday Night
Mostly clear, with a low around 49.
Monday
Sunny, with a high near 64.
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)
2:29 pm EDT Oct 19, 2026
1am EDT Oct 20, 2026-6pm EDT Oct 26, 2026
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