Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Fair
N/A
| Humidity | NA |
| Wind Speed | SW 8 mph |
| Barometer | 29.67 in |
| Dewpoint | N/A |
| Visibility | 10.00 mi |
| Last update | 14 Jan 4:56 am EST |
Extended Forecast for
Islip, Long Island Mac Arthur Airport NY
Overnight

Low: 41 °F
Isolated
ShowersWednesday

High: 49 °F
Cloudy
Wednesday Night

Low: 34 °F
Chance
ShowersThursday
High: 43 °F⇓
Slight Chance
Rain/Snow and
BreezyThursday Night

Low: 19 °F
Partly Cloudy
Friday

High: 36 °F
Sunny
Friday Night

Low: 29 °F
Mostly Cloudy
Saturday
High: 44 °F
Mostly Cloudy
then Chance
RainSaturday Night

Low: 27 °F
Mostly Cloudy
Detailed Forecast
Overnight
Isolated showers. Cloudy, with a low around 41. Southwest wind around 13 mph. Chance of precipitation is 20%.
Wednesday
Cloudy, with a high near 49. Southwest wind 8 to 11 mph.
Wednesday Night
A 50 percent chance of showers, mainly after 10pm. Cloudy, with a low around 34. South wind around 7 mph becoming west after midnight.
Thursday
A slight chance of rain and snow showers before 10am, then a slight chance of snow showers between 10am and 1pm. Cloudy, then gradually becoming mostly sunny, with a temperature falling to around 32 by 5pm. Wind chill values between 20 and 30. Breezy, with a west wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 20%.
Thursday Night
Partly cloudy, with a low around 19. West wind 15 to 17 mph, with gusts as high as 32 mph.
Friday
Sunny, with a high near 36.
Friday Night
Mostly cloudy, with a low around 29.
Saturday
A 30 percent chance of rain after 1pm. Mostly cloudy, with a high near 44.
Saturday Night
Mostly cloudy, with a low around 27.
Sunday
Partly sunny, with a high near 35.
Sunday Night
Partly cloudy, with a low around 21.
M.L.King Day
Mostly sunny, with a high near 35.
Monday Night
Mostly cloudy, with a low around 21.
Tuesday
Mostly sunny, with a high near 30.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Islip, Long Island Mac Arthur Airport NY
40.81°N 73.11°W (Elev. 98 ft)
40.81°N 73.11°W (Elev. 98 ft)
1:35 am EST Jan 14, 2026
5am EST Jan 14, 2026-6pm EST Jan 20, 2026


