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Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Overcast
53°F
12°C
| Humidity | 77% |
| Wind Speed | S 10 mph |
| Barometer | 30.05 in (1017.4 mb) |
| Dewpoint | 46°F (8°C) |
| Visibility | 10.00 mi |
| Wind Chill | 50°F (10°C) |
| Last update | 13 May 4:56 am EDT |
Extended Forecast for
Islip NY
Today
High: 66 °F
Mostly Cloudy
then Partly
Sunny and
BreezyTonight
Low: 53 °F
Slight Chance
Showers then
Showers
LikelyThursday

High: 65 °F
Showers
Thursday Night

Low: 51 °F
Chance
ShowersFriday

High: 68 °F
Chance
ShowersFriday Night

Low: 53 °F
Partly Cloudy
Saturday

High: 74 °F
Sunny
Saturday Night

Low: 58 °F
Partly Cloudy
Sunday

High: 81 °F
Sunny
Detailed Forecast
Today
Cloudy, then gradually becoming mostly sunny, with a high near 66. Breezy, with a south wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 36 mph.
Tonight
Showers likely, mainly after 2am. Mostly cloudy, with a low around 53. South wind 7 to 14 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.
Thursday
Showers and possibly a thunderstorm before 11am, then showers between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. High near 65. Southeast wind 5 to 7 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 51. Calm wind becoming northwest around 5 mph after midnight.
Friday
A 40 percent chance of showers, mainly before 2pm. Partly sunny, with a high near 68. North wind 6 to 8 mph.
Friday Night
Partly cloudy, with a low around 53.
Saturday
Sunny, with a high near 74.
Saturday Night
Partly cloudy, with a low around 58.
Sunday
Sunny, with a high near 81.
Sunday Night
Partly cloudy, with a low around 58.
Monday
Mostly sunny, with a high near 77.
Monday Night
Partly cloudy, with a low around 58.
Tuesday
Mostly sunny, with a high near 79.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Islip NY
40.73°N 73.25°W (Elev. 13 ft)
40.73°N 73.25°W (Elev. 13 ft)
2:29 am EDT May 13, 2026
5am EDT May 13, 2026-6pm EDT May 19, 2026


