Hazardous Weather Conditions
Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Partly Cloudy
41°F
5°C
| Humidity | 82% |
| Wind Speed | N 5 mph |
| Barometer | 29.99 in (1015.5 mb) |
| Dewpoint | 36°F (2°C) |
| Visibility | 10.00 mi |
| Wind Chill | 38°F (3°C) |
| Last update | 19 Apr 7:56 pm EDT |
Extended Forecast for
Islip, Long Island Mac Arthur Airport NY
Frost Advisory April 20, 12:00am until April 20, 08:00am
Freeze Warning April 21, 12:00am until April 21, 09:00am
Tonight
Low: 36 °F
Slight Chance
Showers then
Areas FrostMonday
High: 52 °F
Chance
ShowersMonday Night
Low: 31 °F
Partly Cloudy
Tuesday
High: 52 °F
Sunny
Tuesday Night
Low: 40 °F
Partly Cloudy
then Slight
Chance
ShowersWednesday
High: 57 °F
Decreasing
CloudsWednesday Night
Low: 44 °F
Partly Cloudy
Thursday
High: 64 °F
Mostly Sunny
Thursday Night
Low: 46 °F
Partly Cloudy
Detailed Forecast
Tonight
A 20 percent chance of showers before 10pm. Areas of frost after 4am. Otherwise, mostly clear, with a low around 36. Northwest wind 3 to 8 mph.
Monday
A 40 percent chance of showers. Areas of frost before 7am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 52. Southwest wind 5 to 11 mph becoming northwest in the morning.
Monday Night
Partly cloudy, with a low around 31. Wind chill values between 20 and 25. North wind around 11 mph.
Tuesday
Sunny, with a high near 52. Wind chill values between 25 and 35 early. North wind 5 to 9 mph becoming southwest in the afternoon.
Tuesday Night
A 20 percent chance of showers after 2am. Mostly cloudy, with a low around 40. South wind 9 to 11 mph.
Wednesday
Cloudy, then gradually becoming mostly sunny, with a high near 57.
Wednesday Night
Partly cloudy, with a low around 44.
Thursday
Mostly sunny, with a high near 64.
Thursday Night
Partly cloudy, with a low around 46.
Friday
Mostly sunny, with a high near 62.
Friday Night
A 30 percent chance of showers. Partly cloudy, with a low around 45.
Saturday
A 40 percent chance of showers. Partly sunny, with a high near 59.
Saturday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 44.
Sunday
A 30 percent chance of showers. Mostly cloudy, with a high near 59.
Additional Forecasts and Information
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Forecast AreaABOUT 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)
6:50 pm EDT Apr 19, 2026
8pm EDT Apr 19, 2026-6pm EDT Apr 26, 2026
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