Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Fog/Mist
51°F
11°C
| Humidity | 96% |
| Wind Speed | S 7 mph |
| Barometer | 29.61 in (1002.4 mb) |
| Dewpoint | 50°F (10°C) |
| Visibility | 5.00 mi |
| Wind Chill | 48°F (9°C) |
| Last update | 12 Mar 2:56 am EDT |
Extended Forecast for
Islip, Long Island Mac Arthur Airport NY
Overnight

Low: 49 °F
Chance Rain
and Patchy
FogThursday
High: 54 °F⇓
Rain and
Patchy Fog
then
Rain/Snow and
BreezyThursday Night
Low: 29 °F
Rain/Snow
then Mostly
ClearFriday

High: 45 °F
Increasing
CloudsFriday Night

Low: 36 °F
Decreasing
CloudsSaturday

High: 50 °F
Sunny
Saturday Night

Low: 32 °F
Increasing
CloudsSunday

High: 47 °F
Cloudy
Sunday Night
Low: 41 °F
Chance Rain
then Rain
Detailed Forecast
Overnight
A 40 percent chance of rain. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 49. Southwest wind around 9 mph.
Thursday
Rain before 3pm, then snow, possibly mixed with rain. Patchy fog before 7am. Temperature rising to near 54 by 8am, then falling to around 39 during the remainder of the day. Breezy, with a northwest wind 15 to 24 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Thursday Night
Snow, possibly mixed with rain before 8pm. Low around 29. Northwest wind 9 to 11 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Friday
Increasing clouds, with a high near 45. Wind chill values between 25 and 35 early. West wind 5 to 10 mph becoming south 12 to 17 mph in the afternoon.
Friday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 36. South wind 14 to 16 mph, with gusts as high as 26 mph.
Saturday
Sunny, with a high near 50.
Saturday Night
Increasing clouds, with a low around 32.
Sunday
Cloudy, with a high near 47.
Sunday Night
Rain, mainly after 2am. Low around 41. Chance of precipitation is 80%.
Monday
Rain. High near 57. Breezy. Chance of precipitation is 90%.
Monday Night
Rain likely. Mostly cloudy, with a low around 34. Chance of precipitation is 70%.
Tuesday
A 30 percent chance of rain. Mostly sunny, with a high near 41.
Tuesday Night
Partly cloudy, with a low around 24.
Wednesday
Mostly sunny, with a high near 38.
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)
2:50 am EDT Mar 12, 2026
3am EDT Mar 12, 2026-6pm EDT Mar 18, 2026


