Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Fair
50°F
10°C
| Humidity | 80% |
| Wind Speed | N 8 mph |
| Barometer | 30.15 in (1021.0 mb) |
| Dewpoint | 44°F (7°C) |
| Visibility | 10.00 mi |
| Wind Chill | 47°F (8°C) |
| Last update | 20 Oct 3:56 am EDT |
Extended Forecast for
Port Jefferson NY
Today
High: 65 °F
Sunny
Tonight
Low: 48 °F
Partly Cloudy
Wednesday
High: 59 °F
Mostly Sunny
and Breezy
then Mostly
SunnyWednesday Night
Low: 48 °F
Mostly Cloudy
Thursday
High: 64 °F
Mostly Sunny
Thursday Night
Low: 45 °F
Mostly Clear
and BreezyFriday
High: 56 °F
Sunny
Friday Night
Low: 46 °F
Mostly Clear
Saturday
High: 58 °F
Sunny
Detailed Forecast
Today
Sunny, with a high near 65. North wind 13 to 15 mph, with gusts as high as 25 mph.
Tonight
Partly cloudy, with a low around 48. Northeast wind 13 to 18 mph.
Wednesday
Mostly sunny, with a high near 59. Breezy, with a northeast wind 16 to 21 mph.
Wednesday Night
Mostly cloudy, with a low around 48. North wind around 17 mph.
Thursday
Mostly sunny, with a high near 64. North wind around 15 mph.
Thursday Night
Mostly clear, with a low around 45. Breezy.
Friday
Sunny, with a high near 56.
Friday Night
Mostly clear, with a low around 46.
Saturday
Sunny, with a high near 58.
Saturday Night
Mostly clear, with a low around 47.
Sunday
Sunny, with a high near 62.
Sunday Night
Mostly clear, with a low around 52.
Monday
Mostly sunny, with a high near 66.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Port Jefferson NY
40.95°N 73.05°W (Elev. 151 ft)
40.95°N 73.05°W (Elev. 151 ft)
2:20 am EDT Oct 20, 2026
4am EDT Oct 20, 2026-6pm EDT Oct 26, 2026
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